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Exhibit 10.3

AMENDMENT TO INDEMNIFICATION AGREEMENT

            THIS AMENDMENT TO INDEMNIFICATION AGREEMENT (“Amendment”), dated this 1st day of August 2021, is made and entered into by and among PQ Group Holdings Inc., a Delaware corporation (the “Company”), PQ Holdings Inc., a Delaware corporation, CPQ Midco I Corporation, a Delaware corporation (together with PQ Holdings Inc., the “Intermediate Holdcos”), PQ Corporation, a Pennsylvania corporation (“Opco”), Eco Services Operations Corp., a Delaware corporation (“Eco”, and together with the Company, the Intermediate Holdcos, and Opco, the “Indemnitor Companies”), Ecovyst Catalyst Technologies LLC, a Delaware limited liability company (“Ecovyst”), and [NAME OF INDEMNITEE] (“Indemnitee”).

            WHEREAS, the Indemnitor Companies and Indemnitee entered into that certain Indemnification Agreement, dated as of September 28, 2017, as amended (the “Indemnification Agreement”); 

WHEREAS, in connection with that certain Stock Purchase Agreement, dated February 28, 2021, by and between the Company and Sparta Aggregator L.P. (the “SPA”), the Indemnitor Companies, Ecovyst and Indemnitee now desire to amend the Indemnification Agreement as set forth herein; and

            WHEREAS, pursuant to Section 18 of the Indemnification Agreement, the amendments contemplated by the Indemnitor Companies, Ecovyst, and Indemnitee must be contained in a written agreement signed by all parties to the Indemnification Agreement. 

            NOW, THEREFORE, in consideration of the foregoing and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties, intending to be bound as set forth herein, agree as follows: 

1.Definitions.  Capitalized terms used and not defined in this Amendment have the respective meanings assigned to them in the Indemnification Agreement.

2.Replacement of Defined Terms.  The defined terms PQ Company, PQ Companies, PQ Entity, and PQ Entities in the Indemnification Agreement are hereby replaced in each instance with the terms “Ecovyst Company”, “Ecovyst Companies”, “Ecovyst Entity”, and “Ecovyst Entities”, respectively.

3.Addition of Ecovyst as a Party to the Indemnification Agreement.  Ecovsyt is hereby added as a party to the Indemnification Agreement and assumes all of the rights and obligations of an Ecovyst Company under the Indemnification Agreement (as amended in accordance with Section 2 hereof).

4.Removal of Opco as a Party to the Indemnification Agreement Contingent Upon the Closing. 

            (a)        Effective as of the Closing (as defined in the SPA), without any further action on the part of any party hereto, the Indemnification Agreement shall be amended by removing Opco as a party thereto and, for the avoidance of doubt, Opco shall have no rights, benefits, liabilities or obligations under the Indemnification Agreement, whether to (i) the Indemnitee or (ii) the Company, the Intermediate Holdcos, Eco and/or Ecovyst (collectively, the “Remaining Indemnitors”).  Further, the Remaining Indemnitors and Indemnitee each agree that, effective automatically upon the Closing, without any further action on the part of any party hereto, Opco shall be released and discharged from any and all liabilities or obligations under the Indemnification Agreement.  In connection with the release and discharge of Opco provided for in this Section 4(a), the Remaining Indemnitors agree that Indemnitee may seek to enforce the Indemnification Agreement solely and exclusively against the Remaining Indemnitors and not against Opco, and the Indemnitee agrees that he or she shall not seek to enforce the Indemnification Agreement against Opco and shall seek to enforce the Indemnification Agreement only against the Remaining Indemnitors.  

            (b)        Notwithstanding anything to the contrary set forth in this Amendment, the parties hereto acknowledge and agree that the effectiveness of Section 4 of this Amendment is contingent upon the Closing and that Section 4 of this Amendment shall automatically be null, void and of no force and effect in the event that the SPA is terminated prior to the Closing in accordance with Section 10.1 of the SPA. 

5.Confirmation; Full Force and Effect.  The Remaining Indemnitors and Indemnitee each acknowledge and agree that the removal of Opco from the Indemnification Agreement shall have no effect on their respective liabilities or obligations thereunder except as specifically set forth herein.  In addition, the Indemnification Agreement, as amended hereby, shall remain binding upon each of the parties thereto and shall remain in full force and effect in accordance with its 

terms. Each of the Remaining Indemnitors and Indemnitee expressly ratifies and reaffirms their respective obligations under the Indemnification Agreement as amended hereby.

6.Insurance Not Affected.  For the avoidance of doubt, the parties hereto agree that nothing in this Amendment is intended to, or shall, affect the rights of Indemnitee under any applicable director and officer liability insurance policy maintained by any Ecovyst Company. 

7.Entire Agreement.  The Indemnification Agreement, as amended hereby, constitutes the entire understanding agreement among the parties with respect to the subject matter hereof and supersedes any prior written or oral agreements or understandings of the parties hereto with respect to such matter. 

8.Counterparts.  This Amendment may be executed in counterparts, each of which is deemed an original, but all of which constitute one and the same agreement.  Delivery of an executed counterpart of this Amendment electronically or by facsimile shall be effective as delivery of an original executed counterpart of this Amendment.

9.Governing Law.  This Amendment shall be governed by, and construed and enforced in accordance with, the laws of the State of Delaware, without regard to its conflict of laws rules.

[Remainder of the Page Intentionally Left Blank]

IN WITNESS WHEREOF, the parties have executed this Amendment as of the date first written above.

									
	The Company:		PQ GROUP HOLDINGS INC.
			By: ____________________________________
			Name: Joseph S. Koscinski
			Title: Vice President and General Counsel
			
			
	Intermediate Holdcos:
		PQ HOLDINGS INC.
			By: ____________________________________
			Name: Joseph S. Koscinski
			Title: Vice President and General Counsel
			
			CPQ MIDCO I CORPORATION
			By: ____________________________________
			Name: Joseph S. Koscinski
			Title: Vice President
			
			
	Opco:		PQ CORPORATION
			By: ____________________________________
			Name: Joseph S. Koscinski
			Title: Vice President and General Counsel
			
			
	Eco:
		ECO SERVICES OPERATIONS CORP.
			By: ____________________________________
			Name: Joseph S. Koscinski
			Title: Vice President and General Counsel
			
			
	Ecovyst:
		ECOVYST CATALYST TECHNOLOGIES LLC
			By: ____________________________________
			Name: Joseph S. Koscinski
			Title: Vice President and General Counsel
			
			
	Indemnitee:		________________________________________
			Name: [NAME OF INDEMNITEE]Document

Exhibit 10.4

INDEMNIFICATION AGREEMENT

This Indemnification Agreement (“Agreement”) is made and entered into as of [●] by and among Ecovyst Inc., a Delaware corporation (the “Company”), Ecovyst Holdings Inc., a Delaware corporation, Ecovyst Midco I Inc., a Delaware corporation, Ecovyst Midco II Inc. (together with Ecovyst Holdings Inc. and Ecovyst Midco I Inc., the “Intermediate Holdcos”), Ecovyst Catalyst Technologies LLC, a Delaware limited liability company (“Opco”), Eco Services Operations Corp., a Delaware corporation (“Eco”, and together with the Company, the Intermediate Holdcos, and Opco, the “Ecovyst Companies” and each an “Ecovyst Company”), and [●] (“Indemnitee”).

WHEREAS, in light of the litigation costs and risks to directors and officers resulting from their service to companies, and the desire of the Ecovyst Companies to attract and retain qualified individuals to serve as directors and officers, it is reasonable, prudent and necessary for each of the Ecovyst Companies to indemnify and advance expenses on behalf of its and the other Ecovyst Companies’ directors and officers to the fullest extent permitted under Applicable Law so that they will serve or continue to serve the Ecovyst Companies free from undue concern regarding such risks;

WHEREAS, the Ecovyst Companies have requested that Indemnitee serve or continue to serve as a director and/or an officer of one or more of the Ecovyst Companies and may have requested or may in the future request that Indemnitee serve one or more Ecovyst Entities (as hereinafter defined) as a director or an officer or in other capacities;

WHEREAS, one of the conditions that Indemnitee requires in order to serve as a director and/or an officer of one or more of the Ecovyst Companies is that Indemnitee be so indemnified; and

WHEREAS, Indemnitee may have certain rights to indemnification, advancement of expenses and/or insurance provided by one or more of the Designating Stockholders (as hereinafter defined) (or their affiliates) and/or any insurer providing insurance coverage under any policy purchased or maintained by such Designating Stockholders  (or their affiliates), which Indemnitee, the Ecovyst Companies and the Designating Stockholders (or their affiliates) intend to be secondary to the primary obligation of the Ecovyst Companies to indemnify Indemnitee as provided herein, with the Ecovyst Companies’ acknowledgement of and agreement to the foregoing being a material condition to Indemnitee’s willingness to serve as a director and/or officer of one or more of the Ecovyst Companies.

NOW, THEREFORE, in consideration of the premises and the covenants contained herein, the Ecovyst Companies and Indemnitee do hereby covenant and agree as follows: 

1.Services by Indemnitee.  Indemnitee agrees to serve as a director and/or an officer of one or more of the Ecovyst Companies.  Indemnitee may at any time and for any reason resign from such position (subject to any contractual obligation the Indemnitee may have under any other agreement).

2.Indemnification - General.  On the terms and subject to the conditions of this Agreement, the Ecovyst Companies shall, to the fullest extent permitted under Applicable Law, indemnify Indemnitee with respect to, and hold Indemnitee harmless from and against, all losses, damages, liabilities, judgments, fines, penalties, costs, amounts paid in settlement, Expenses (as hereinafter defined) and other amounts that Indemnitee reasonably incurs and that result from, arise in connection with or are by reason of Indemnitee’s Corporate Status (as hereinafter defined), including all interest, assessments and other charges paid or payable in connection therewith, and shall advance Expenses to Indemnitee.  The obligations of the Ecovyst Companies under this Agreement (a) are joint and several obligations of each Ecovyst Company, (b) shall continue after such time as Indemnitee ceases to serve as a director or an officer of the Ecovyst Companies or in any other Corporate Status and (c) include, without limitation, claims for monetary damages against Indemnitee in respect of any actual or alleged liability or other loss of Indemnitee, to the fullest extent permitted under Applicable Law.  A limitation under law of any Ecovyst Company on providing indemnification or an advance of expenses to Indemnitee shall not limit the indemnification and advancement obligations of any Ecovyst Company not so limited.

3.Proceedings Other Than Proceedings by or in the Right of the Ecovyst Companies.  If in connection with or by reason of Indemnitee’s Corporate Status, Indemnitee was, is, or is threatened to be made, a party to or a participant in any Proceeding (as hereinafter defined) other than a Proceeding by or in the right of any of the Ecovyst Companies to procure a judgment in its favor, the Ecovyst Companies shall, to the fullest extent permitted under Applicable Law, indemnify Indemnitee with respect to, and hold Indemnitee harmless from and against, all losses, damages, liabilities, judgments, fines, penalties, costs, amounts paid in settlement, Expenses and other amounts that Indemnitee reasonably incurs in connection with such Proceeding or any claim, issue or matter therein, including all interest, assessments and other charges paid or payable in connection therewith.

4.Proceedings by or in the Right of the Ecovyst Companies.  If in connection with or by reason of Indemnitee’s Corporate Status, Indemnitee was, is, or is threatened to be made, a party to or a participant in any Proceeding by or in the right of any of the Ecovyst Companies to procure a judgment in such Ecovyst Company’s favor, the Ecovyst Companies shall, to the fullest extent permitted under Applicable Law, indemnify Indemnitee with respect to, and hold Indemnitee harmless from and against, all Expenses reasonably incurred by Indemnitee or on behalf of Indemnitee in connection with such Proceeding or any claim, issue or matter therein.

5.Mandatory Indemnification in Case of Successful Defense.  Notwithstanding any other provision of this Agreement, to the extent that Indemnitee is, by reason of Indemnitee’s Corporate Status, a party to (or a participant in) and is successful, on the merits or otherwise, in defense of any Proceeding (including, without limitation, any Proceeding brought by or in the right of any Ecovyst Company), the Ecovyst Companies shall, to the fullest extent permitted under Applicable Law, indemnify Indemnitee with respect to, and hold Indemnitee harmless from and against, all Expenses reasonably incurred by Indemnitee or on behalf of Indemnitee in connection therewith.  If Indemnitee is not wholly successful in defense of such Proceeding but is successful, on the merits or otherwise, as to one or more but less than all claims, issues or matters in such Proceeding, the Ecovyst Companies shall, to the fullest extent permitted under Applicable Law, indemnify Indemnitee against all Expenses reasonably incurred by Indemnitee or on behalf of Indemnitee in connection with each successfully resolved claim, issue or matter.  For purposes of this Section 5 and without limitation, the termination of any claim, issue or matter in such a Proceeding by dismissal, with or without prejudice, on substantive or procedural grounds, or settlement of any such claim prior to a final judgment by a court of competent jurisdiction with respect to such Proceeding, shall be deemed to be a successful result as to such claim, issue or matter; provided, however, that any settlement of any claim, issue or matter in such a Proceeding shall not be deemed to be a successful result as to such claim, issue or matter if such settlement is effected by Indemnitee without the Ecovyst Companies’ prior written consent, which consent shall not be unreasonably withheld, delayed or conditioned.

6.Partial Indemnification.  If Indemnitee is entitled under any provision of this Agreement or otherwise to indemnification by any of the Ecovyst Companies for some or a portion of the losses, damages, liabilities, judgments, fines, penalties, costs, amounts paid in settlement, and Expenses, including all interest, assessments and other charges paid or payable in connection therewith, incurred by Indemnitee or on behalf of Indemnitee in connection with a Proceeding or any claim, issue or matter therein, in whole or in part, the Ecovyst Companies shall, to the fullest extent permitted under Applicable Law, indemnify Indemnitee to the fullest extent to which Indemnitee is entitled to such indemnification. 

7.Indemnification for Additional Expenses Incurred to Secure Recovery or as Witness.

(a)The Ecovyst Companies shall, to the fullest extent permitted under Applicable Law, indemnify Indemnitee with respect to, and hold Indemnitee harmless from and against, any and all Expenses and, if requested by Indemnitee, shall advance on an as-incurred basis (as provided in Section 8 of this Agreement) such Expenses to Indemnitee, which are incurred by Indemnitee in connection with any action or proceeding or part thereof brought by Indemnitee for (i) indemnification or advance payment of Expenses by the Ecovyst Companies under this Agreement, any other agreement, the Certificate of Incorporation, By-laws, limited liability company agreement or other governing document of the applicable Ecovyst Company as now or hereafter in effect; or (ii) recovery under any director and officer liability insurance policy maintained by any Ecovyst Entity.

(b)To the extent that Indemnitee is, by reason of Indemnitee’s Corporate Status, a witness (or is forced or asked to respond to discovery requests) in any Proceeding to which Indemnitee is not a party, the Ecovyst Companies shall, to the fullest extent permitted under Applicable Law, indemnify Indemnitee with respect to, and hold Indemnitee harmless from and against, and the Ecovyst Companies shall advance on an as-incurred basis (as provided in Section 8 of this Agreement), all Expenses reasonably incurred by Indemnitee or on behalf of Indemnitee in connection therewith.

8.Advancement of Expenses.  The Ecovyst Companies shall, to the fullest extent permitted under Applicable Law, pay on a current and as-incurred basis all Expenses incurred by Indemnitee in connection with any Proceeding in any way connected with, resulting from or relating to Indemnitee’s Corporate Status.  Such Expenses shall be paid in advance of the final disposition of such Proceeding, without regard to whether Indemnitee will ultimately be entitled to be indemnified for such Expenses and without regard to whether an Adverse Determination (as hereinafter defined) has been or may be made.  Upon submission of a request for advancement of Expenses pursuant to Section 9(c) of this Agreement, Indemnitee shall be entitled to advancement of Expenses as provided in this Section 8, and such advancement of Expenses shall continue until such time (if any) as there is a final non-appealable judicial determination that Indemnitee is not entitled to indemnification.  Indemnitee shall repay such amounts advanced if and to the extent that it shall ultimately be determined in a decision by a court of competent jurisdiction from which no appeal can be taken that Indemnitee is not entitled to be indemnified by the Ecovyst Companies for such Expenses.  Such repayment obligation shall be unsecured and shall not bear interest.  The Ecovyst Companies shall not impose on Indemnitee additional conditions to advancement or require from Indemnitee 

additional undertakings regarding repayment.  Indemnitee shall, in all events, be entitled to advancement of Expenses, without regard to Indemnitee’s ultimate entitlement to indemnification, until the final determination of the Proceeding.

9.Indemnification Procedures.

(a)Notice of Proceeding.  Indemnitee agrees to notify the Ecovyst Companies promptly upon being served with any summons, citation, subpoena, complaint, indictment, information or other document relating to any Proceeding or matter which may be subject to indemnification or advancement of Expenses hereunder.  Any failure by Indemnitee to notify any Ecovyst Company will not relieve the Ecovyst Companies of their advancement or indemnification obligations under this Agreement unless, and only to the extent that, the Ecovyst Companies can establish that such omission to notify resulted in actual and material prejudice to them, which prejudice cannot be reversed or otherwise eliminated without any material negative effect on the Ecovyst Companies, and the omission to notify the Ecovyst Companies will, in any event, not relieve any Ecovyst Company from any liability which it may have to indemnify Indemnitee otherwise than under this Agreement.  If, at the time of receipt of any such notice, the Ecovyst Companies have director and officer liability insurance policies in effect, the Ecovyst Companies will promptly notify the relevant insurers in accordance with the procedures and requirements of such policies.

(b)Defense; Settlement.  Indemnitee shall have the sole right and obligation to control the defense or conduct of any claim or Proceeding with respect to Indemnitee.  The Ecovyst Companies shall not, without the prior written consent of Indemnitee, which may be provided or withheld in Indemnitee’s sole discretion, effect any settlement of any Proceeding against Indemnitee or which, in the reasonable opinion of Independent Counsel (as hereinafter defined), could have been brought against Indemnitee or which potentially or actually imposes any cost, liability, exposure or burden on Indemnitee unless (i) such settlement solely involves the payment of money or performance of any obligation by persons other than Indemnitee and includes an unconditional, full release of Indemnitee by all relevant parties from all liability on any matters that are the subject of such Proceeding and an acknowledgment that Indemnitee denies all wrongdoing in connection with such matters and (ii) the Ecovyst Companies have fully indemnified the Indemnitee with respect to, and held Indemnitee harmless from and against, all Expenses and other amounts incurred by Indemnitee or on behalf of Indemnitee in connection with such Proceeding.  The Ecovyst Companies shall not be obligated to indemnify Indemnitee against amounts paid in settlement of a Proceeding against Indemnitee if such settlement is effected by Indemnitee without the Ecovyst Companies’ prior written consent, which consent shall not be unreasonably withheld, delayed or conditioned, unless such settlement solely involves the payment of money or performance of any obligation by persons other than the Ecovyst Companies and includes an unconditional release of the Ecovyst Companies by any party to such Proceeding other than the Indemnitee from all liability on any matters that are the subject of such Proceeding and an acknowledgment that the Ecovyst Companies deny all wrongdoing in connection with such matters.

(c)Request for Advancement; Request for Indemnification.  

(i)           To obtain advancement of Expenses under this Agreement, Indemnitee shall submit to the Ecovyst Companies a written request therefor, together with such invoices or other supporting information as may be reasonably requested by the Ecovyst Companies and reasonably available to Indemnitee, and an unsecured written undertaking to repay amounts advanced only to the extent that it is ultimately determined that Indemnitee is not entitled to be indemnified by any of the Ecovyst Companies.  The Ecovyst Companies shall make advance payment of Expenses to Indemnitee no later than five (5) business days after receipt of the written request for advancement (and each subsequent request for advancement) by Indemnitee.  If, at the time of receipt of any such written request for advancement of Expenses, the Ecovyst Companies have director and officer insurance policies in effect, the Ecovyst Companies shall promptly notify the relevant insurers in accordance with the procedures and requirements of such policies.  The Ecovyst Companies shall thereafter keep such director and officer insurers informed of the status of the Proceeding or other claim (with assistance from the Indemnitee as reasonably required) and take such other actions, as appropriate to secure coverage of Indemnitee for such claim.

(ii)        To obtain indemnification under this Agreement, at any time before or after submission of a request for advancement pursuant to Section 9(c)(i) of this Agreement, Indemnitee may submit a written request for indemnification hereunder.  The time at which Indemnitee submits a written request for indemnification shall be determined by the Indemnitee in the Indemnitee’s sole discretion.  Once Indemnitee submits such a written request for indemnification (and only at such time that Indemnitee submits such a written request for indemnification), a Determination (as hereinafter defined) shall thereafter be made, as provided in and only to the extent required by Section 9(d) of this Agreement.  In no event shall a Determination be made, or required to be made, as a condition to or otherwise in connection with any advancement of Expenses pursuant to Section 8 and Section 9(c)(i) of this Agreement.  If, at the time of receipt of any such request for indemnification, the Ecovyst Companies have director and officer insurance policies in effect, the Ecovyst Companies shall promptly notify the relevant insurers and take such other actions as necessary or appropriate to secure coverage of Indemnitee for such claim in accordance with the procedures and requirements of such policies.

(d)Determination.  The Ecovyst Companies agree that Indemnitee shall be indemnified to the fullest extent permitted under Applicable Law and that no Determination shall be required in connection with such indemnification unless specifically required by Applicable Law which cannot be waived.  In no event shall a Determination be required in connection with indemnification for Expenses pursuant to Section 7 of this Agreement or incurred in connection with any Proceeding or portion thereof with respect to which Indemnitee has been successful on the merits or otherwise.  Any decision that a Determination is required by Applicable Law in connection with any other indemnification of Indemnitee, and any such Determination, shall be made within twenty (20) days after receipt of Indemnitee’s written request for indemnification pursuant to Section 9(c)(ii) of this Agreement and such Determination shall be made either (i) by the Disinterested Directors (as hereinafter defined), even though less than a quorum, so long as Indemnitee does not request that such Determination be made by Independent Counsel (as hereinafter defined), or (ii) if so requested by Indemnitee, in Indemnitee’s sole discretion, by Independent Counsel in a written opinion to the Ecovyst Companies and Indemnitee.  If a Determination is made that Indemnitee is entitled to indemnification, payment to Indemnitee shall be made within five (5) business days after such Determination.  Indemnitee shall reasonably cooperate with the person, persons or entity making such determination with respect to Indemnitee’s entitlement to indemnification, including providing to such person, persons or entity upon reasonable advance request any documentation or information which is not privileged or otherwise protected from disclosure and which is reasonably available to Indemnitee and reasonably necessary to such Determination.  Any Expenses incurred by Indemnitee in so cooperating with the Disinterested Directors or Independent Counsel, as the case may be, making such determination shall be advanced and borne by the Ecovyst Companies (irrespective of the Determination as to Indemnitee’s entitlement to indemnification) and each Ecovyst Company is liable to indemnify and hold Indemnitee harmless therefrom.  If the person, persons or entity empowered or selected under this Section 9(d) to determine whether Indemnitee is entitled to indemnification shall not have made a determination within twenty (20) days after receipt by the Ecovyst Companies of the request therefor, the requisite determination of entitlement to indemnification shall, to the fullest extent not prohibited by Applicable Law, be deemed to have been made and Indemnitee shall be entitled to such indemnification, absent (i) a misstatement by Indemnitee of a material fact or an omission of a material fact necessary to make Indemnitee’s statement not materially misleading in connection with the request for indemnification that actually prejudices the Ecovyst Companies, or (ii) a prohibition of such indemnification under Applicable Law; provided, however, that such twenty (20) day period may be extended for a reasonable time, not to exceed an additional twenty (20) days, if the person, persons or entity making the determination with respect to entitlement to indemnification in good faith requires such additional time for the obtaining or evaluating of documentation and/or information relating thereto; and provided, further, that the foregoing provisions of this Section 9(d) shall not apply if the determination of entitlement to indemnification is to be made by Independent Counsel pursuant to Section 9(e) of this Agreement.

(e)Independent Counsel.  In the event Indemnitee requests that the Determination be made by Independent Counsel pursuant to Section 9(d) of this Agreement, the Independent Counsel shall be selected as provided in this Section 9(e).  The Independent Counsel shall be selected by Indemnitee (unless Indemnitee shall request that such selection be made by the Board of Directors, in which event the Board of Directors shall make such selection on behalf of the Ecovyst Companies, subject to the remaining provisions of this Section 9(e)), and Indemnitee or the Ecovyst Companies, as the case may be, shall give written notice to the other, advising the Ecovyst Companies or Indemnitee of the identity of the Independent Counsel so selected.  The Ecovyst Companies or Indemnitee, as the case may be, may, within five (5) days after such written notice of selection shall have been received, deliver to Indemnitee or the Ecovyst Companies, as the case may be, a written objection to such selection; provided, however, that such objection may be asserted only on the ground that the Independent Counsel so selected does not meet the requirements of “Independent Counsel” as defined in Section 15 of this Agreement, and the objection shall set forth with particularity the factual basis of such assertion.  Absent a proper and timely objection, the person so selected shall act as Independent Counsel.  If a written objection is so made and substantiated, the Independent Counsel so selected may not serve as Independent Counsel unless and until such objection is withdrawn or a court of competent jurisdiction has determined that such objection is without merit.  If, within ten (10) days after submission by Indemnitee of a written request for indemnification pursuant to Section 9(c)(ii) of this Agreement and after a request for the appointment of Independent Counsel has been made, no Independent Counsel shall have been selected and not objected to, either the Ecovyst Companies or Indemnitee may petition a court of competent jurisdiction for resolution of any objection which shall have been made by the Ecovyst Companies or Indemnitee to the other’s selection of Independent Counsel and/or for the appointment as Independent Counsel of a person selected by the court or by such other person as the court shall designate, and the person with respect to whom all objections are so resolved or the person so appointed shall act as Independent Counsel under Section 9(d) of this Agreement.  Upon the due commencement of any judicial proceeding or arbitration pursuant to Section 9(f) of this Agreement, Independent Counsel shall be discharged and relieved of any further responsibility in such capacity (subject to the applicable standards of professional conduct then prevailing).  Any expenses incurred by or in connection with the appointment of Independent Counsel shall be borne by the Ecovyst Companies (irrespective of the Determination of Indemnitee’s entitlement to indemnification) and not by Indemnitee.

(f)Consequences of Determination; Remedies of Indemnitee.  The Ecovyst Companies shall be bound by and shall have no right to challenge a Favorable Determination.  If an Adverse Determination is made, or if for any other reason the Ecovyst Companies do not make timely indemnification payments or advances of Expenses, Indemnitee shall have the 

right to commence a Proceeding before a court of competent jurisdiction to challenge such Adverse Determination and/or to require the Ecovyst Companies to make such payments or advances (and the Company shall have the right to defend its position in such Proceeding and to appeal any adverse judgment in such Proceeding).  Indemnitee shall be entitled to be indemnified for all Expenses incurred in connection with such a Proceeding and to have such Expenses advanced by the Company in accordance with Section 8 of this Agreement.  If Indemnitee fails to challenge an Adverse Determination within twenty (20) business days, or if Indemnitee challenges an Adverse Determination and such Adverse Determination has been upheld by a final judgment of a court of competent jurisdiction from which no appeal can be taken, then, to the extent and only to the extent required by such Adverse Determination or final judgment, the Ecovyst Companies shall not be obligated to indemnify Indemnitee under this Agreement.

(g)Presumptions; Burden and Standard of Proof.  The parties intend and agree that, to the extent permitted under Applicable Law, in connection with any Determination with respect to Indemnitee’s entitlement to indemnification hereunder by any person, including a court:

(i)     it will be presumed that Indemnitee is entitled to indemnification under this Agreement (notwithstanding any Adverse Determination), and the Ecovyst Entities or any other person or entity challenging such right will have the burden of proof to overcome that presumption in connection with the making by any person, persons or entity of any determination contrary to that presumption;

(ii)   the termination of any action, suit or proceeding by judgment, order, settlement, conviction, or upon a plea of nolo contendere or its equivalent, shall not, of itself, create a presumption that Indemnitee did not act in good faith and in a manner which Indemnitee reasonably believed to be in or not opposed to the best interests of the applicable Ecovyst Entity, and, with respect to any criminal action or proceeding, had reasonable cause to believe that Indemnitee’s conduct was unlawful;

(iii)    Indemnitee will be deemed to have acted in good faith if Indemnitee’s action is based on the records or books of account of the applicable Ecovyst Entity, including financial statements, or on information supplied to Indemnitee by the officers, employees or committees of the board of directors of the applicable Ecovyst Entity, or on the advice of legal counsel or other advisors (including financial advisors and accountants) for the applicable Ecovyst Entity or on information or records given in reports made to the applicable Ecovyst Entity by an independent certified public accountant or by an appraiser or other expert or advisor selected by the applicable Ecovyst Entity; and

(iv)    the knowledge and/or actions, or failure to act, of any director, officer, agent or employee of any of the Ecovyst Entities or relevant enterprises will not be imputed to Indemnitee in a manner that limits or otherwise adversely affects Indemnitee’s rights hereunder.

The provisions of this Section 9(g) shall not be deemed to be exclusive or to limit in any way the other circumstances in which Indemnitee may be deemed to have met the applicable standard of conduct set forth in this Agreement.

10.Remedies of Indemnitee.

(a)In the event that (i) a determination is made pursuant to Section 9(d) of this Agreement that Indemnitee is not entitled to indemnification under this Agreement, (ii) advancement of Expenses is not timely made pursuant to Section 8 and Section 9(c)(i) of this Agreement, (iii) no determination of entitlement to indemnification shall have been made pursuant to Section 9(d) of this Agreement within twenty (20) days after receipt by the Ecovyst Companies of the request for indemnification, (iv) payment of indemnification is not made pursuant to Section 5, 6 or 7 of this Agreement within five (5) business days after receipt by the Ecovyst Companies of a written request therefor, (v) payment of indemnification pursuant to Section 3, 4 or 7 of this Agreement is not made within five (5) business days after a determination has been made that Indemnitee is entitled to indemnification or (vi) the Ecovyst Companies or any other person takes or threatens to take any action to declare this Agreement void or unenforceable, or institutes any litigation or other action or Proceeding designed to deny, or to recover from, the Indemnitee the benefits provided or intended to be provided to the Indemnitee hereunder, Indemnitee shall be entitled to an adjudication by a court of his entitlement to such indemnification or advancement of Expenses.  Alternatively, Indemnitee, at his option, may seek an award in arbitration to be conducted by a single arbitrator pursuant to the Commercial Arbitration Rules of the American Arbitration Association.  The Ecovyst Companies shall not oppose Indemnitee’s right to seek any such adjudication or award in arbitration.

(b)In the event that a determination shall have been made pursuant to Section 9(d) of this Agreement that Indemnitee is not entitled to indemnification, any judicial proceeding or arbitration commenced pursuant to this Section 10 shall be conducted in all respects as a de novo trial, or arbitration, on the merits, in which (i) Indemnitee shall not be 

prejudiced by reason of that adverse determination, and (ii) the Ecovyst Companies shall bear the burden of establishing that Indemnitee is not entitled to indemnification.

(c)If a determination shall have been made pursuant to Section 9(d) of this Agreement that Indemnitee is entitled to indemnification, the Ecovyst Companies shall be bound by such determination in any judicial proceeding or arbitration commenced pursuant to this Section 10, absent (i) a misstatement by Indemnitee of a material fact or an omission of a material fact necessary to make Indemnitee’s statement not materially misleading in connection with the request for indemnification that actually prejudices the Ecovyst Companies, or (ii) a prohibition of such indemnification under Applicable Law.

(d)The Ecovyst Companies shall, to the fullest extent not prohibited by Applicable Law, be precluded from asserting in any judicial proceeding or arbitration commenced pursuant to this Section 10 that the procedures and presumptions of this Agreement are not valid, binding and enforceable and shall stipulate in any such court or before any such arbitrator that the Ecovyst Companies are bound by all the provisions of this Agreement.
  
11.Insurance; Subrogation; Other Rights of Recovery, etc.

(a)Each Ecovyst Company shall use its reasonable best efforts to purchase and maintain a policy or policies of insurance with reputable insurance companies with A.M. Best ratings of “A” or better, providing Indemnitee with coverage for any liability asserted against, and incurred by, Indemnitee or on Indemnitee’s behalf by reason of Indemnitee’s Corporate Status, or arising out of Indemnitee’s status as such, whether or not any such Ecovyst Company would have the power to indemnify Indemnitee against such liability.  Such insurance policies shall have coverage terms and policy limits at least as favorable to Indemnitee as the insurance coverage provided to any other director or officer of the Ecovyst Companies.  If any Ecovyst Company has such insurance in effect at the time it receives from Indemnitee any notice of the commencement of an action, suit, proceeding or other claim, such Ecovyst Company shall give prompt notice of the commencement of such action, suit, proceeding or other claim to the insurers and take such other actions in accordance with the procedures set forth in the policy as required or appropriate to secure coverage of Indemnitee for such action, suit, proceeding or other claim.  Such Ecovyst Company shall thereafter take all necessary or desirable action to cause such insurers to pay, on behalf of Indemnitee, all amounts payable as a result of such action, suit, proceeding or other claim in accordance with the terms of such policy.  Such Ecovyst Company shall continue to provide such insurance coverage to Indemnitee for a period of at least ten (10) years after Indemnitee ceases to serve as a director or an officer or in any other Corporate Status.

(b)In the event of any payment by any Ecovyst Company under this Agreement, such Ecovyst Company shall be subrogated to the extent of such payment to all of the rights of recovery of Indemnitee against any other Ecovyst Entity, and Indemnitee hereby agrees, as a condition to obtaining any advancement or indemnification from the Ecovyst Companies, to assign to such Ecovyst Company all of Indemnitee’s rights to obtain from such other Ecovyst Entity such amounts to the extent that they have been paid by such Ecovyst Company to or for the benefit of Indemnitee as advancement or indemnification under this Agreement and are adequate to indemnify Indemnitee with respect to the costs, Expenses or other items to the full extent that Indemnitee is entitled to indemnification or other payment hereunder; and Indemnitee will (upon request by the Ecovyst Companies) execute all papers required and use reasonable best efforts to take all action reasonably necessary to secure such rights, including execution of such documents as are necessary to enable such Ecovyst Company to bring suit or enforce such rights.

(c)Each of the Ecovyst Companies hereby unconditionally and irrevocably waives, relinquishes and releases, and covenants and agrees not to exercise (and to cause each of the other Ecovyst Entities not to exercise), any rights that such Ecovyst Company may now have or hereafter acquire against any Designating Stockholder (or former Designating Stockholder), insurer of such Designating Stockholder (or former Designating Stockholder) or Indemnitee that arise from or relate to the existence, payment, performance or enforcement of the Ecovyst Companies’ obligations under this Agreement or under any other indemnification agreement (whether pursuant to contract, by-laws or charter) with any person or entity, including, without limitation, any right of subrogation (whether pursuant to contract or common law), reimbursement, exoneration, contribution or indemnification, or to be held harmless, and any right to participate in any claim or remedy of Indemnitee against any Designating Stockholder (or former Designating Stockholder) or Indemnitee, whether or not such claim, remedy or right arises in equity or under contract, statute or common law, including, without limitation, the right to take or receive from any Designating Stockholder (or former Designating Stockholder), insurer of such Designating Stockholder (or former Designating Stockholder) or Indemnitee, directly or indirectly, in cash or other property or by set-off or in any other manner, payment or security on account of such claim, remedy or right.

(d)The Ecovyst Companies shall not be liable to pay or advance to Indemnitee any amounts otherwise indemnifiable under this Agreement or under any other indemnification agreement if, and to the extent that, Indemnitee has otherwise actually received such payment under any insurance policy, contract, agreement or otherwise; provided, however, that (i) the Ecovyst Companies hereby agree that they are the indemnitors of first resort under this Agreement and under any 

other indemnification agreement (i.e., their obligations to Indemnitee under this Agreement or any other agreement or undertaking to provide advancement and/or indemnification to Indemnitee are primary and any obligation of any Designating Stockholder (or any affiliate thereof other than any Ecovyst Entity) and/or any obligation of any insurer providing insurance coverage under any policy purchased or maintained by such Designating Stockholders (or by any affiliate thereof, other than any Ecovyst Entity) to provide advancement or indemnification for the same Expenses, liabilities, judgments, penalties, fines and amounts paid in settlement (including all interest, assessments and other charges paid or payable in connection with or in respect of such Expenses, liabilities, judgments, penalties, fines and amounts paid in settlement) incurred by Indemnitee are secondary, (ii) the Ecovyst Companies shall be required to advance the full amount of expenses incurred by any such Indemnitee and shall be liable for the full amount of all liability and loss suffered by such Indemnitee (including, but not limited to, Expenses, judgments, fines and amounts paid in settlement actually and reasonably incurred by such Indemnitee in connection with such Proceeding), without regard to any rights any such Indemnitee may have against any Designating Stockholder or against any insurance carrier providing insurance coverage to Indemnitee under any insurance policy issued to a Designating Stockholder and (iii) if any Designating Stockholder (or any affiliate thereof other than any Ecovyst Entity) pays or causes to be paid, for any reason, any amounts otherwise indemnifiable hereunder or under any other indemnification agreement (whether pursuant to contract, by-laws or charter) with Indemnitee, then (x) such Designating Stockholder (or such affiliate, as the case may be) shall be fully subrogated to all rights of Indemnitee with respect to such payment and (y) the Ecovyst Companies shall fully indemnify, reimburse and hold harmless such Designating Stockholder (or such other affiliate) for all such payments actually made by such Designating Stockholder (or such other affiliate).

(e)The Ecovyst Companies’ obligation to indemnify or advance Expenses hereunder to Indemnitee in respect of or relating to Indemnitee’s service at the request of any of the Ecovyst Companies as a director, officer, employee, fiduciary, trustee, representative, partner or agent of any other Ecovyst Entity shall be reduced by any amount Indemnitee has actually received as payment of indemnification or advancement of Expenses from such other Ecovyst Entity, except to the extent that such indemnification payments and advance payment of Expenses when taken together with any such amount actually received from other Ecovyst Entities or under director and officer insurance policies maintained by one or more Ecovyst Entities are inadequate to fully pay all costs, Expenses or other items to the full extent that Indemnitee is otherwise entitled to indemnification or other payment hereunder.

(f)Except as provided in Sections 11(c), 11(d) and 11(e) of this Agreement, the rights to indemnification and advancement of Expenses as provided by this Agreement shall not be deemed exclusive of, and shall be considered supplemental to, any other rights to which Indemnitee may at any time, whenever conferred or arising, be entitled under Applicable Law, under the Ecovyst Entities’ Certificates of Incorporation or By-Laws, or under any other agreement, vote of stockholders or resolution of directors of any Ecovyst Entity, or otherwise.  Indemnitee’s rights under this Agreement are present contractual rights that fully vest upon Indemnitee’s first service as a director or an officer of any of the Ecovyst Companies.  The Parties hereby agree that Sections 11(c), 11(d) and 11(e) of this Agreement shall be deemed exclusive and shall be deemed to modify, amend and clarify any right to indemnification or advancement provided to Indemnitee under any other contract, agreement or document with any Ecovyst Entity.

(g)No amendment, alteration or repeal of this Agreement or of any provision hereof shall limit or restrict any right of Indemnitee under this Agreement in respect of any action taken or omitted by such Indemnitee in Indemnitee’s Corporate Status prior to such amendment, alteration or repeal.  To the extent that a change in the General Corporation Law of the State of Delaware (or other Applicable Law), whether by statute or judicial decision, permits greater indemnification or advancement of Expenses than would be afforded currently under the Ecovyst Entities’ Certificates of Incorporation or By-Laws and this Agreement, it is the intent of the parties hereto that Indemnitee enjoy by this Agreement the greater benefits so afforded by such change.  The assertion or employment of any right or remedy hereunder, or otherwise, shall not prevent the concurrent assertion or employment of any other right or remedy.

12.Employment Rights; Successors; Third Party Beneficiaries.

(a)This Agreement shall not be deemed an employment contract between the Ecovyst Companies and Indemnitee.  This Agreement shall continue in force as provided above after Indemnitee has ceased to serve as a director or an officer of the Ecovyst Companies or any other Corporate Status.

(b)This Agreement shall be binding upon each of the Ecovyst Companies and their successors and assigns and shall inure to the benefit of Indemnitee and Indemnitee’s heirs, executors and administrators.  If any of the Ecovyst Companies or any of their respective successors or assigns shall (i) consolidate with or merge into any other corporation or entity and shall not be the continuing or surviving corporation or entity of such consolidation or merger or (ii) transfer all or substantially all of its properties and assets to any individual, corporation or other entity, then, and in each such case, proper provisions shall be made so that the successors and assigns of the Ecovyst Companies shall assume all of the obligations set forth in this Agreement.

(c)The Designating Stockholders are express third party beneficiaries of this Agreement, are entitled to rely upon this Agreement, and may specifically enforce the Ecovyst Companies’ obligations hereunder (including but not limited to the obligations specified in Section 11 of this Agreement) as though a party hereunder.

13.Severability.  If any provision or provisions of this Agreement shall be held to be invalid, illegal or unenforceable for any reason whatsoever:  (i) the validity, legality and enforceability of the remaining provisions of this Agreement (including without limitation, each portion of any Section of this Agreement containing any such provision held to be invalid, illegal or unenforceable, that is not itself invalid, illegal or unenforceable) shall not in any way be affected or impaired thereby; (ii) such provision or provisions shall be deemed reformed to the extent necessary to conform to Applicable Law and to give the maximum effect to the intent of the parties hereto; and (iii) to the fullest extent possible, the provisions of this Agreement (including, without limitation, each portion of any Section of this Agreement containing any such provision held to be invalid, illegal or unenforceable, that is not itself invalid, illegal or unenforceable) shall be construed so as to give effect to the intent manifested thereby.

14.Exception to Right of Indemnification or Advancement of Expenses.  Notwithstanding any other provision of this Agreement and except as provided in Section 7(a) of this Agreement or as may otherwise be agreed by any Ecovyst Company, Indemnitee shall not be entitled to indemnification or advancement of Expenses under this Agreement with respect to any Proceeding brought by Indemnitee (other than a Proceeding by Indemnitee (i) by way of defense or counterclaim or other similar portion of a Proceeding, (ii) to enforce Indemnitee’s rights under this Agreement or (iii) to enforce any other rights of Indemnitee to indemnification, advancement or contribution from the Ecovyst Companies under any other contract, by-laws or charter or under statute or other law, including any rights under Section 145 of the Delaware General Corporation Law), unless the bringing of such Proceeding or making of such claim shall have been approved by the board of directors of the applicable Ecovyst Company.

15.Definitions.  For purposes of this Agreement:

(a)“Applicable Law” means, as applied to each Ecovyst Company, any law applicable to such Ecovyst Company as in existence on the date hereof and as amended from time to time; provided, however, that under all circumstances Applicable Law shall be construed assuming that Indemnitee is a director or officer of the indemnifying corporation for purposes of determining the availability and scope of any indemnification right afforded to Indemnitee under this Agreement; provided, further, that as applied to each of Opco and Potters, Applicable Law shall be construed to treat Section 145 of the Delaware General Corporation Law (as in existence on the date hereof and as amended from time to time, including any successor provision thereto) as if it was applicable to each of Opco and Potters.

(b)“Board of Directors” means the board of directors of the Company.

(c)“By-laws” means, in each case, the bylaws or similar governing document of the relevant company as amended from time to time.

(d)[“CCMP Entities” means investment funds affiliated with CCMP Capital Advisors, LP, including CCMP Capital Investors III, L.P., CCMP Capital Investors III (Employee), L.P., CCMP Capital Investors III (AV-7), L.P., CCMP Capital Investors III (AV-8), L.P., CCMP Capital Investors III (AV-9), L.P., CCMP Capital Investors III (AV-10), L.P. and Quartz Co-Invest, L.P., and any related investment adviser or management company, any investment fund, managing member or general partner that is an affiliate of any of the foregoing entities (other than any Ecovyst Entity) or that is advised by the same investment adviser as any of the foregoing entities or by an affiliate of such investment adviser.]

(e)“Certificate of Incorporation” means, in each case, the certificate of incorporation, articles of incorporation or similar constituting document of the relevant company as amended from time to time.

(f)“Corporate Status” describes the status of a person by reason of such person’s past, present or future service as a director, officer, employee, fiduciary, trustee, or agent of any of the Ecovyst Companies (including, without limitation, one who serves at the request of any of the Ecovyst Companies as a director, officer, employee, fiduciary, trustee or agent of any other Ecovyst Entity).

(g)“Designating Stockholder” means any of the [CCMP Entities / INEOS Entities], in each case so long as an individual designated (directly or indirectly) by the [CCMP Entities / INEOS Entities] or any of their respective affiliates serves or has served as a director and/or officer of any Ecovyst Entity.

(h)“Determination” means a determination that either (i) there is a reasonable basis for the conclusion that indemnification of Indemnitee is proper in the circumstances because Indemnitee met a/the particular standard(s) of conduct (a “Favorable Determination”) or (ii) there is no reasonable basis for the conclusion that indemnification of Indemnitee is 

proper in the circumstances because Indemnitee met a/the particular standard(s) of conduct (an “Adverse Determination”).  An Adverse Determination shall include the decision that a Determination was required in connection with indemnification and the decision as to the applicable standard of conduct.

(i)“Disinterested Director” means a director of the Company (or, if a Determination is necessary with respect to a Ecovyst Company other than the Company, a director of such Ecovyst Company) who is not and was not a party to the Proceeding in respect of which indemnification is sought by Indemnitee and does not otherwise have an interest materially adverse to any interest of the Indemnitee.

(j)“Expenses” shall mean all direct and indirect costs, fees and expenses of any type or nature whatsoever and shall specifically include, without limitation, all reasonable attorneys’ fees, retainers, court costs, transcript costs, fees and costs of experts, witness fees and costs, travel expenses, duplicating costs, printing and binding costs, telephone charges, postage, delivery service fees, any federal, state, local or foreign taxes imposed on Indemnitee as a result of the actual or deemed receipt of any payments under this Agreement, ERISA excise taxes and penalties, and all other disbursements or expenses of the types customarily incurred in connection with prosecuting, defending, preparing to prosecute or defend, investigating, being or preparing to be a witness, in, or otherwise participating in, a Proceeding or an appeal resulting from a Proceeding, including, but not limited to, the premium for appeal bonds, attachment bonds or similar bonds and all interest, assessments and other charges paid or payable in connection with or in respect of any such Expenses, and shall also specifically include, without limitation, all reasonable attorneys’ fees and all other expenses incurred by or on behalf of Indemnitee in connection with preparing and submitting any requests or statements for indemnification, advancement, contribution or any other right provided by this Agreement.  Expenses, however, shall not include amounts of judgments or fines against Indemnitee.

(k)“Independent Counsel” means, at any time, any law firm, or a member of a law firm, that (a) is experienced in matters of corporation law and (b) is not, at such time, or has not been in the five years prior to such time, retained to represent: (i) any Ecovyst Entity or Indemnitee in any matter material to either such party (other than with respect to matters concerning Indemnitee under this Agreement, or of other indemnities under similar indemnification agreements), or (ii) any other party to the Proceeding giving rise to a claim for indemnification hereunder.  Notwithstanding the foregoing, the term “Independent Counsel” shall not include any person who, under the applicable standards of professional conduct then prevailing, would have a conflict of interest in representing either the Ecovyst Companies or Indemnitee in an action to determine Indemnitee’s rights under this Agreement.  The Ecovyst Companies agree to pay the reasonable fees and expenses of the Independent Counsel referred to above and to fully indemnify such counsel against any and all Expenses, claims, liabilities and damages arising out of or relating to this Agreement or its engagement pursuant hereto and to be jointly and severally liable therefor.

(l)“INEOS Entities” means INEOS Investments Partnership and its respective successors and affiliates (other than any Ecovyst Entity).

(m)“Ecovyst Entity” means any Ecovyst Company, any of their respective subsidiaries and any other corporation, partnership, limited liability company, joint venture, trust, employee benefit plan or other enterprise with respect to which Indemnitee serves as a director, officer, employee, partner, representative, fiduciary, trustee or agent, or in any similar capacity, at the request of any Ecovyst Company.

(n)“Proceeding” includes any actual, threatened, pending or completed action, suit, arbitration, alternate dispute resolution mechanism, investigation (formal or informal), inquiry, administrative hearing or any other actual, threatened, pending or completed proceeding, whether brought by or in the right of any Ecovyst Company or otherwise and whether civil, criminal, administrative or investigative in nature, in which Indemnitee was, is, may be or will be involved as a party, witness or otherwise, by reason of Indemnitee’s Corporate Status or by reason of any action taken by Indemnitee or of any inaction on Indemnitee’s part while acting as director, officer, employee, fiduciary, trustee or agent of any Ecovyst Entity (in each case whether or not Indemnitee is acting or serving in any such capacity or has such status at the time any liability or expense is incurred for which indemnification or advancement of Expenses can be provided under this Agreement). If Indemnitee believes in good faith that a given situation may lead to or culminate in the institution of a Proceeding, this shall be considered a Proceeding under this paragraph.

16.Construction.  Whenever required by the context, as used in this Agreement the singular number shall include the plural, the plural shall include the singular, and all words herein in any gender shall be deemed to include (as appropriate) the masculine, feminine and neuter genders.

17.Reliance.  The Ecovyst Companies expressly confirm and agree that they have entered into this Agreement and assumed the obligations imposed on each of them hereby in order to induce Indemnitee to serve as a director and/or an 

officer of one or more of the Ecovyst Companies, and the Ecovyst Companies acknowledge that Indemnitee is relying upon this Agreement in serving as a director and/or an officer of one or more of the Ecovyst Companies.

18.Modification and Waiver.  No supplement, modification or amendment of this Agreement shall be binding unless executed in a writing identified as such by all of the parties hereto.  Except as otherwise expressly provided herein, the rights of a party hereunder (including the right to enforce the obligations hereunder of the other parties) may be waived only with the written consent of such party, and no waiver of any of the provisions of this Agreement shall be deemed or shall constitute a waiver of any other provisions hereof (whether or not similar) nor shall such waiver constitute a continuing waiver.

19.Notice Mechanics.  All notices, requests, demands or other communications hereunder shall be in writing and shall be deemed to have been duly given if (i) delivered by hand and receipted for by the party to whom said notice or other communication shall have been directed, or (ii) mailed by certified or registered mail with postage prepaid, on the third business day after the date on which it is so mailed:

(a)If to Indemnitee to:
[●]

						
	(b) If to any Ecovyst Company, to:
		c/o Ecovyst Inc.
		300 Lindenwood Drive
		Valleybrooke Corporate Center 
		Malvern, Pennsylvania 19355
		Attn: Joseph S. Koscinski
		
	with a copy to: 	Ropes & Gray LLP
		Prudential Tower, 800 Boylston Street
		Boston, MA  02199-3600
		Attn:  Craig E. Marcus

or to such other address as may have been furnished (in the manner prescribed above) as follows:  (a) in the case of a change in address for notices to Indemnitee, furnished by Indemnitee to the Ecovyst Companies and (b) in the case of a change in address for notices to any Ecovyst Company, furnished by the Ecovyst Companies to Indemnitee.

20.Contribution.  To the fullest extent permissible under Applicable Law, if the indemnification provided for in this Agreement is unavailable to Indemnitee for any reason whatsoever, the Ecovyst Companies, in lieu of indemnifying Indemnitee, shall contribute to the amount incurred by Indemnitee, whether for judgments, fines, penalties, excise taxes, amounts paid or to be paid in settlement and/or for reasonably incurred Expenses, in connection with any claim relating to an indemnifiable event under this Agreement, in such proportion as is deemed fair and reasonable in light of all of the circumstances of such Proceeding in order to reflect (i) the relative benefits received by the Ecovyst Companies and Indemnitee as a result of the event(s) and/or transaction(s) giving cause to such Proceeding; and/or (ii) the relative fault of the Ecovyst Companies (and their other directors, officers, employees and agents) and Indemnitee in connection with such event(s) and/or transaction(s).

21.Governing Law; Submission to Jurisdiction; Appointment of Agent for Service of Process.  This Agreement and the legal relations among the parties shall, to the fullest extent permitted under Applicable Law, be governed by, and construed and enforced in accordance with, the laws of the State of Delaware, without regard to its conflict of laws rules.  The Ecovyst Companies and Indemnitee hereby irrevocably and unconditionally (i) agree that any action or proceeding arising out of or in connection with this Agreement shall be brought only in the Court of Chancery of the State of Delaware (the “Delaware Court”), and not in any other state or federal court in the United States of America or any court in any other country, (ii) consent to submit to the exclusive jurisdiction of the Delaware Court for purposes of any action or proceeding arising out of or in connection with this Agreement, (iii) waive any objection to the laying of venue of any such action or proceeding in the Delaware Court, and (iv) waive, and agree not to plead or to make, any claim that any such action or proceeding brought in the Delaware Court has been brought in an improper or otherwise inconvenient forum.

22.Headings.  The headings of the paragraphs of this Agreement are inserted for convenience only and shall not be deemed to constitute part of this Agreement or to affect the construction thereof.

23.Counterparts.  This Agreement may be executed in one or more counterparts, each of which shall for all purposes be deemed to be an original but all of which together shall constitute one and the same Agreement.

[Remainder of Page Intentionally Blank]

IN WITNESS WHEREOF, the parties hereto have executed this Agreement on the date first above written.

									
	The Company:		ECOVYST INC
			By: ____________________________________
			Name:
			Title:
			
			
	Intermediate Holdcos:
		ECOVYST HOLDINGS INC.
			By: ____________________________________
			Name:
			Title:
			
			ECOVYST MIDCO I INC
			By: ____________________________________
			Name:
			Title:
			
			
	Opco:		ECOVYST CATALYST TECHNOLOGIES LLC
			By: ____________________________________
			Name:
			Title:
			
			
	Eco:
		ECO SERVICES OPERATIONS CORP.
			By: ____________________________________
			Name:
			Title:
			
			
	Indemnitee:		________________________________________
			Name: [●]

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