Exhibit 4.3


Form of Warrant Certificate


[FACE]


 


Number


Warrants


 


THIS
WARRANT SHALL BE VOID IF NOT EXERCISED PRIOR TO


THE
EXPIRATION OF THE EXERCISE PERIOD PROVIDED FOR


IN THE
WARRANT AGREEMENT DESCRIBED BELOW


PYROPHYTE
ACQUISITION CORP.


 


Incorporated Under the Laws of the Cayman Islands


 


CUSIP G7308P 127


 


Warrant Certificate


 


This Warrant Certificate
certifies that ________________, or registered assigns, is the registered holder of warrant(s) evidenced hereby (the “Warrants”
and each, a “Warrant”) to purchase Class A Ordinary Shares, $0.0001 par value per share (the “Ordinary
Shares”), of Pyrophyte Acquisition Corp., a Cayman Islands exempted company (the “Company”). Each
whole Warrant entitles the holder, upon exercise during the period set forth in the Warrant Agreement referred to below, to receive from
the Company that number of fully paid and non-assessable Ordinary Shares as set forth below, at the exercise price (the “Warrant
Price”) as determined pursuant to the Warrant Agreement, payable in lawful money (or through “cashless exercise”
as provided for in the Warrant Agreement) of the United States of America upon surrender of this Warrant Certificate and payment of the
Warrant Price at the office or agency of the Warrant Agent referred to below, subject to the conditions set forth herein and in the Warrant
Agreement. Defined terms used in this Warrant Certificate but not defined herein shall have the meanings given to them in the Warrant
Agreement.


 


Each whole Warrant is initially
exercisable for one fully paid and non-assessable Ordinary Share. No fractional shares will be issued upon exercise of any Warrant. If,
upon the exercise of Warrants, a holder would be entitled to receive a fractional interest in an Ordinary Share, the Company will, upon
exercise, round down to the nearest whole number the number of Ordinary Shares to be issued to the Warrant holder. The number of Ordinary
Shares issuable upon exercise of the Warrants is subject to adjustment upon the occurrence of certain events set forth in the Warrant
Agreement.


 


The initial Warrant Price
per Ordinary Share for any Warrant is equal to $11.50 per share. The Warrant Price is subject to adjustment upon the occurrence of certain
events set forth in the Warrant Agreement.


 






     


     


    

 


Subject to the conditions
set forth in the Warrant Agreement, the Warrants may be exercised only during the Exercise Period and to the extent not exercised by the
end of such Exercise Period, such Warrants shall become void. The Warrants may be redeemed, subject to certain conditions, as set forth
in the Warrant Agreement.


 


Reference is hereby made to
the further provisions of this Warrant Certificate set forth on the reverse hereof and such further provisions shall for all purposes
have the same effect as though fully set forth at this place.


 


This Warrant Certificate shall
not be valid unless countersigned by the Warrant Agent, as such term is used in the Warrant Agreement.


 


This Warrant Certificate
shall be governed by and construed in accordance with the internal laws of the State of New York.


 


	 	PYROPHYTE ACQUISITION CORP.
	 	 
	 	 
	 	By:	 
	 	Name:	 
	 	Title:	 
	 	
     

     

    CONTINENTAL STOCK TRANSFER & TRUST COMPANY,

	 	as Warrant Agent
	 	 
	 	By:	 
	 	Name:	 
	 	Title:	 


 


[Signature Page to Warrant Certificate] 


 



     


     


    




 



[Form of Warrant Certificate]


 


[Reverse]


 


The Warrants evidenced by
this Warrant Certificate are part of a duly authorized issue of Warrants entitling the holder on exercise to receive Ordinary Shares and
are issued or to be issued pursuant to a Warrant Agreement dated as of _______________, 2021 (the “Warrant Agreement”),
duly executed and delivered by the Company to Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent
(the “Warrant Agent”), which Warrant Agreement is hereby incorporated by reference in and made a part of this
instrument and is hereby referred to for a description of the rights, limitation of rights, obligations, duties and immunities thereunder
of the Warrant Agent, the Company and the holders (the words “holders” or “holder”
meaning the Registered Holders or Registered Holder, respectively) of the Warrants. A copy of the Warrant Agreement may be obtained by
the holder hereof upon written request to the Company. Defined terms used in this Warrant Certificate but not defined herein shall have
the meanings given to them in the Warrant Agreement.


 


Warrants may be exercised
at any time during the Exercise Period set forth in the Warrant Agreement. The holder of Warrants evidenced by this Warrant Certificate
may exercise them by surrendering this Warrant Certificate, with the form of election to purchase set forth hereon properly completed
and executed, together with payment of the Warrant Price as specified in the Warrant Agreement (or through “cashless exercise”
as provided for in the Warrant Agreement) at the principal corporate trust office of the Warrant Agent. In the event that upon any exercise
of Warrants evidenced hereby the number of Warrants exercised shall be less than the total number of Warrants evidenced hereby, there
shall be issued to the holder hereof or his, her or its assignee, a new Warrant Certificate evidencing the number of Warrants not exercised.


 


Notwithstanding anything else
in this Warrant Certificate or the Warrant Agreement, no Warrant may be exercised unless at the time of exercise (i) a registration statement
covering the Ordinary Shares to be issued upon exercise is effective under the Securities Act and (ii) a prospectus thereunder relating
to the Ordinary Shares is current, except through “cashless exercise” as provided for in the Warrant Agreement. In addition,
and notwithstanding anything else in this Warrant Certificate or the Warrant Agreement, to the extent that the holder of a Warrant has
delivered a notice contemplated by subsection 3.5.5 of the Warrant Agreement, neither the Company nor the Warrant Agent shall issue to
Holder, and Holder may not acquire, any right it might have to acquire, a number of shares of Common Stock upon exercise of any Warrant
to the extent that, upon such exercise, the number of shares of Common Stock then beneficially owned by Holder would exceed the Maximum
Percentage of shares of Common Stock outstanding immediately after giving effect to such exercise as determined in accordance with subsection
3.3.5. of the Warrant Agreement.


 






     


     


    

 


The Warrant Agreement provides
that upon the occurrence of certain events the number of Ordinary Shares issuable upon exercise of the Warrants set forth on the face
hereof may, subject to certain conditions, be adjusted. If, upon exercise of a Warrant, the holder thereof would be entitled to receive
a fractional interest in an Ordinary Share, the Company shall, upon exercise, round down to the nearest whole number of Ordinary Shares
to be issued to the holder of the Warrant.


 


Warrant Certificates, when
surrendered at the principal corporate trust office of the Warrant Agent by the Registered Holder thereof in person or by legal representative
or attorney duly authorized in writing, may be exchanged, in the manner and subject to the limitations provided in the Warrant Agreement,
but without payment of any service charge, for another Warrant Certificate or Warrant Certificates of like tenor evidencing in the aggregate
a like number of Warrants.


 


Upon due presentation for
registration of transfer of this Warrant Certificate at the office of the Warrant Agent a new Warrant Certificate or Warrant Certificates
of like tenor and evidencing in the aggregate a like number of Warrants shall be issued to the transferee(s) in exchange for this Warrant
Certificate, subject to the limitations provided in the Warrant Agreement, without charge except for any tax or other governmental charge
imposed in connection therewith.


 


The Company and the Warrant
Agent may deem and treat the Registered Holder(s) hereof as the absolute owner(s) of this Warrant Certificate (notwithstanding any notation
of ownership or other writing hereon made by anyone), for the purpose of any exercise hereof, of any distribution to the holder(s) hereof,
and for all other purposes, and neither the Company nor the Warrant Agent shall be affected by any notice to the contrary. Neither the
Warrants nor this Warrant Certificate entitles any holder hereof to any rights of a shareholder of the Company.


 






     


     


    

 


Election to Purchase


 


(To Be Executed Upon Exercise of Warrant)


 


The undersigned hereby irrevocably
elects to exercise the right, represented by this Warrant Certificate, to receive _____ Ordinary Shares and herewith tenders payment for
such Ordinary Shares to the order of Pyrophyte Acquisition Corp. (the “Company”) in the amount of $_____________
in accordance with the terms hereof. The undersigned requests that a certificate for such Ordinary Shares be registered in the name of
_____________, whose address is ______________ and that such Ordinary Shares be delivered to ______________, whose address is _______________.
If said number of Ordinary Shares is less than all of the Ordinary Shares purchasable hereunder, the undersigned requests that a new Warrant
Certificate representing the remaining balance of such Ordinary Shares be registered in the name of ___________________, whose address
is _______________ and that such Warrant Certificate be delivered to _______________, whose address is _______________.


 


In the event that the Warrant
has been called for redemption by the Company pursuant to Section 6.2 of the Warrant Agreement and a holder thereof elects to exercise
its Warrant pursuant to a Make-Whole Exercise, the number of Ordinary Shares that this Warrant is exercisable for shall be determined
in accordance with subsection 3.3.1(c) or Section 6.2 of the Warrant Agreement, as applicable.


 


In the event that the Warrant
is a Private Placement Warrant or a Working Capital Warrant that is to be exercised on a “cashless basis” pursuant to subsection
3.3.1(c) of the Warrant Agreement, the number of Ordinary Shares that this Warrant is exercisable for shall be determined in accordance
with subsection 3.3.1(c) of the Warrant Agreement.


 


In the event that the Warrant
is to be exercised on a “cashless basis” pursuant to Section 7.4 of the Warrant Agreement, the number of Ordinary Shares
that this Warrant is exercisable for shall be determined in accordance with Section 7.4 of the Warrant Agreement.


 


In the event that the Warrant
may be exercised, to the extent allowed by the Warrant Agreement, through cashless exercise (i) the number of Ordinary Shares that this
Warrant is exercisable for would be determined in accordance with the relevant section of the Warrant Agreement which allows for such
cashless exercise and (ii) the holder hereof shall complete the following: The undersigned hereby irrevocably elects to exercise the right,
represented by this Warrant Certificate, through the cashless exercise provisions of the Warrant Agreement, to receive Ordinary Shares.
If said number of Ordinary Shares is less than all of the Ordinary Shares purchasable hereunder (after giving effect to the cashless exercise),
the undersigned requests that a new Warrant Certificate representing the remaining balance of such Ordinary Shares be registered in the
name of ________________, whose address is________________ and that such Warrant Certificate be delivered to ________________, whose address
is ________________.


 






     


     


    

  


By signing this Election to
Purchase, the undersigned hereby certifies that such election will not result in the undersigned beneficially owning shares of Common
Stock in excess of the 4.9% Cap outlined in Section 3.5.5 of the Warrant Agreement.


 


[To be included in any Election
to Purchase of a holder who has provided the notice set forth in subsection 3.3.5 of the Warrant Agreement.


 


By signing this Election
to Purchase, the undersigned hereby certifies that upon after giving effect to such exercise, the undersigned (together with such person’s
affiliates) or any “group” of which holder or its affiliates is a member, would not beneficially own in excess of the Maximum
Percentage of the shares of Common Stock outstanding immediately after giving effect to such exercise as determined in accordance with
subsection 3.3.5. of the Warrant Agreement.] 


 


[Signature Page Follows]


 


	Date: ____________, 20___	 	 
	 	 	Signature
	 	 	 
	 	 	 
	 	 	 
	 	 	 
	 	 	(Address)
	 	 	 
	 	 	 
	 	 	(Tax Identification Number)
	Signature Guaranteed:	 	 
	 	 	 
	 	 	 


 


 


THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE
GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE
MEDALLION PROGRAM, PURSUANT TO S.E.C. RULE 17Ad-15 UNDER THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED (OR ANY SUCCESSOR RULE)).