<PAGE>

                                                                   EXHIBIT 10.24













Pages where confidential treatment has been requested are stamped "Confidential
Treatment Requested.  The redacted material has been separately filed with the
Commission."  The appropriate section has been marked at the appropriate place
with a star [*].


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                                                                   EXHIBIT 10.24

                                        "Confidential Treatment Requested.  The
                                        redacted material has been separately
                                        filed with the Commission."

                                DISTRIBUTOR AGREEMENT


This agreement is entered into this 1st day of June, 1997 by and between Alcide
Corporation, a Delaware corporation whose offices are located at 8561 154th Ave.
N.E., Redmond, Washington (hereinafter "Supplier") and Ingenieursbureau lr. P.C.
Heemskerk b.v. (hereinafter "Distributor").


NOW, THEREFORE, in consideration of the mutual covenants contained herein, the
parties agree as follows:

     1.   Definitions

          As used herein, the term
     
          1.1  "Contract Term" shall mean that period stated on Schedule A
attached hereto.

          1.2  "Products" shall mean Alcide-Registered Trademark- external udder
care products including UDDERgold-Registered Trademark- Germicidal Barrier Teat
Dip, 4XLA-Registered Trademark- Pre- and Post-Milking Teat Dip and 
Pre-Gold-Registered Trademark- Pre-Dip.  Products shall include any refinements
or improvements to the existing udder care product line and any new teat dips
introduced into the Territories by Alcide Corporation during the term of this
Agreement.

          1.3  "Territories" shall be as defined by the attached Schedule B.

     2.   Appointment of Distributor

          2.1  Subject to the terms and conditions of this Agreement, Supplier
hereby appoints Distributor as exclusive distributor of the Products for the
Territories.  Distributor hereby accepts said appointment and agrees to actively
promote and sell the Products.

          2.2  In accepting this appointment, Distributor agrees that it and its
affiliates shall not, directly or indirectly, sell or distribute:

               (a)  Any other external udder care product/teat dip [*].


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                                   "Confidential Treatment Requested.  The
                                   redacted material has been separately filed
                                   with the Commission."

               (b)  Any product containing acidified chlorite as its active
ingredient [*].

          2.3  Distributor may appoint agents, dealers or sales representatives
to act on Distributor's behalf for sales of the Products in the Territories,
provided that any compensation to such agents, dealers or representatives shall
be solely Distributor's responsibility.

          2.4  Subject to the terms and conditions of this Agreement,
Distributor is authorized to sell the Products purchased from Supplier in such
manner, at such prices and upon such terms as Distributor shall determine. 
Distributor is an independent contractor, not an agent or representative of
Supplier.  Distributor shall not assume or create any obligation in the name of
Supplier or make any representation, warranty or guarantee on behalf of or in
the name of Supplier.

          2.5  Labeling of the Products shall be determined exclusively by
Supplier.

               In any of the Distributor's activities relating to the promotion
and sale of the Products, Supplier's name and trademark shall always be
prominently displayed in order to protect Supplier's rights and goodwill in the
same.  Whenever Supplier's name and trademark are used in advertising and
promotional programs, Supplier retains the right to review and approve same.  

          2.6  All registrations, trade names, trademarks and product names
under which the Products are sold shall be the property of Supplier.  In the
event any registrations (e.g., Product registrations) are taken or issued in the
name of Distributor, Distributor shall, upon request, but in no event later than
upon termination of this Agreement, transfer such registrations to Supplier or
Supplier's designee and provide any documents and assistance reasonably required
in connection therewith.

          2.7  This Agreement shall not be construed as establishing a
franchise.

          2.8  Supplier and Distributor each represent and warrant to the other
that it is authorized to enter into and perform this Agreement and that this
Agreement does not and shall not conflict with any other agreements it may have.

     3.   Terms and Conditions of Sale

          3.1  All of Distributor's orders for the Products shall be subject to
the terms and conditions set forth in this Section 3 and in the attached
Schedule D which provides product pricing and discounts; no additional or
different terms set forth in Distributor's or Supplier's purchase order,
acknowledgment or other forms or correspondence (other than an amendment to


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                                   "Confidential Treatment Requested.  The
                                   redacted material has been separately filed
                                   with the Commission."


this Agreement pursuant to Section 8.1 hereof) shall govern any sales of the
Products by Supplier to Distributor.

          3.2  Supplier shall be responsible for labeling, packing and shipping
all Products ordered in a form agreed upon between Supplier and Distributor as
being appropriate for the Territory and suitable for ready sale to the end user
in the Territories.  All deliveries shall be [*].

          3.3  Supplier and Distributor have agreed to goal amounts of Products
(as set forth in Schedule A attached) to be purchased by Distributor during the
Contract Term.  Goals will be [*] so that appropriate marketing strategies can
be developed and implemented to facilitate attainment of the goal.  If goal
amounts are not established for any Contract Term, such goal amounts shall be
[*] than the goal amounts for the preceding Contract Term.  [*]

          3.4  Distributor shall make payments to Supplier for Products ordered
by wire transfer within [*].

          3.5  Supplier provides the Limited Warranty as described in Schedule
C.

          3.6  Prices shown in Schedule D may be revised by Supplier at any time
during the Term of this Agreement  following sixty (60) days prior written
notice to Distributor from Supplier.

      4.  Promotional Activities

          4.1  Distributor shall undertake such advertising and promotional
activity relating to Products as is deemed appropriate by Distributor and
Supplier to actively promote sales.  Such advertising and promotional activity
shall be solely at Distributor's expense unless otherwise agreed to in writing
by Supplier.  All advertising and promotional materials developed by Distributor
shall be in accordance with descriptions of Products provided by Supplier and,
to the best of Distributor's knowledge, shall be accurate in all material
respects.  Upon request, Supplier shall have the right to review and approve all
advertising and promotional materials developed by Distributor.

          4.2  [*]  A list of major meetings, annual shows, seminars and
training programs at which Supplier's participation is desired shall be
submitted ninety (90) days in advance by Distributor.

          4.3  A tabulation of Distributor sales by Product and Territory shall
be provided by Distributor to Supplier at the end of each fiscal quarter. 


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                                   "Confidential Treatment Requested.  The
                                   redacted material has been separately filed
                                   with the Commission."


     5.   Term and Termination

          5.1  Ninety (90) days prior to expiration of this Agreement,
Distributor and Supplier shall meet to discuss their intentions regarding a new
or extended agreement.

          5.2  Distributor's exclusive rights for any Territory may be
terminated by Supplier if Distributor fails to purchase during the contract year
at least [*] for such Territory.  Supplier may then add additional distributors
for the Territory.

          5.3  This Agreement may also be terminated by either party, effective
immediately upon notice to the other, in the event the party to which such
notice is sent becomes the subject of any bankruptcy or insolvency proceedings.

          5.4  This Agreement may be terminated by either party in the event
there is a material breach of this Agreement by the other party.  The injured
party shall give written notice of the breach.  The party in breach shall then
have 60 days to cure the breach.  If the breach is not cured within 60 days,
this Agreement shall be terminated.

          5.5  The provisions of Sections 2.2(b), 2.6, and 7 and any accrued
obligations shall survive termination of this Agreement.

     6.   Applicable Law.

          This Agreement shall be governed by and construed in accordance with
the laws of the State of Washington, regardless of its or any other
jurisdiction's choice of law principles.  The 1980 U.N. Convention on Contracts
for the International Sale of Goods shall not apply to this Agreement. 
Distributor shall not make any claim or institute any litigation against
Supplier in connection with this Agreement or any invoice other than in the
courts of the State of Washington, U.S.A., King County, or the United States
District Court for the Western District of Washington.  Distributor hereby
irrevocably consents and submits to the jurisdiction of the courts of the State
of Washington and the United States District Court for the Western District of
Washington.

     7.   Confidential Information

          7.1  A.   Supplier and Distributor agree, with respect to any
confidential information received from the other and identified as confidential
information, that:

                    (a)  the receiving party shall use reasonable care to
prevent disclosure of the confidential information to any third party without
the prior written consent of the disclosing


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party, and the degree of care taken by the receiving party shall be at least as
great as the degree of care which the receiving party takes in protecting its
own confidential information; and

                    (b)  Receiving party shall not use confidential information
disclosed by the other party for any commercial purpose other than pursuant to
this Agreement, or publish or disclose it to third persons without the prior
written consent of the disclosing party.

               B.   Neither party shall have any obligation with respect to any
information disclosed by the other party:

                    (a)  which is already in the possession of the receiving
party at the time of its receipt from the disclosing party;

                    (b)  which the receiving party lawfully receives from
another person whose disclosure thereof to the receiving party does not violate
any rights of the disclosing party; or

                    (c)  which is or becomes published or otherwise publicly
available through no act or omission of the receiving party.

               C.   Upon expiration or termination of this Agreement,
Distributor and Supplier shall each, upon the written request of the other,
return or destroy all materials, copies thereof and extracts therefrom which
include any information designated as confidential by the other pursuant to
Section 7.1.A.  Each may, however, retain for legal archival purposes only, one
(1) copy of all such material.

               D.   The provisions of this Section 7.1 shall survive termination
of this Agreement and remain in full force and effect for a period of three (3)
years as to any item of confidential information.

     8.   Miscellaneous

          8.1  This Agreement constitutes the entire agreement between
Distributor and Supplier and may be amended only by a written document signed by
both parties hereto.

          8.2  All notices, requests or other communications under this
Agreement shall be given in the English language and will be deemed properly
given if in writing and delivered in person, sent via international courier
service or by confirmed facsimile transmission to the intended recipient at the
address specified below, or to such other address as a party may specify in
writing:


                    If to Supplier:     Alcide Corporation

                                             Attn:  Joseph A. Sasenick


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          If to Distributor:       Ingenieursbureau lr. P.C.
                                   Heemskerk b.v.

                                        Attn:  E.N.A. Heemskerk

          8.3  The failure by either party to enforce any term or provision of
this Agreement shall not constitute a waiver of the same.

          8.4  This Agreement may be executed in any number of counterparts,
each of which shall be deemed an original and one and the same document.

          8.5  The rights of Distributor hereunder shall not be assigned or
transferred, either voluntarily or by operation of law, without the prior
written consent of Supplier, nor shall the duties of Distributor hereunder be
delegated in whole or in part.  Any such assignment, transfer or delegation
shall be of no force or effect.  Any change in control of Distributor shall be
deemed an impermissible assignment and entitle Supplier to terminate this
Agreement.  This Agreement shall be binding upon and inured to the benefit of
Supplier, its successors and assigns.

          8.6  If any provision of this Agreement is or becomes invalid, illegal
or unenforceable, the remaining provisions shall remain in full force and
effect, and for the invalid, illegal or unenforceable provision shall be
substituted a valid, legal and enforceable provision which shall be as similar
as possible in economic and business objectives as intended by the parties.

          8.7  Distributor shall comply with all applicable laws and regulations
in performing under this Agreement and reselling Products, including the U.S.
Foreign Corrupt Practices Act.

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

                                   ALCIDE CORPORATION
                                   ("Supplier")

                                   By  /s/ Joseph Sasenick

                                   Ingenieursbureau lr. P.C.
                                   Heemskerk b.v.
                                   ("Distributor")

                                   By /s/ Eric N.A. Heemskerk
                                   President


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                                   "Confidential Treatment Requested.  The
                                   redacted material has been separately filed
                                   with the Commission."


                                SCHEDULE A

                                   (1) Contract Term
                                   (2) Goals

(1)  The Contract Term shall be a two year period commencing June 1, 1997, and
     ending May 31, 1999.

(2)  Goal amounts of Product to be purchased by Distributor from Supplier [*]
     after commencement of the Contract Term are as follows:

               Year 1  --     [*]
               Year 2  --     [*]



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                                      SCHEDULE B

                                     Territories




The countries of:

                                   Netherlands
                                   Denmark
                                   Belgium
                                   Germany
                                   Luxembourg
                                   Sweden
                                   Finland


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                                      SCHEDULE C





                                   Limited Warranty

Alcide Corporation warrants to all purchasers of this Product that it has been
manufactured in accordance with U.S. regulatory requirements, is free of defects
and is as described in all labeling affixed hereto.  Alcide's sole obligation
under this warranty and buyer's sole remedy for any defect or failure to meet
such requirements or labeling shall be limited to replacement without cost
(except all costs for shipping and handling which shall be Distributor's
responsibility) of any quantity of the Product sold.

THE WARRANTY PROVIDED HEREIN AND THE OBLIGATIONS AND LIABILITIES OF ALCIDE
CORPORATION HEREUNDER ARE EXCLUSIVE AND IN LIEU OF, AND BUYER HEREBY WAIVES ALL
OTHER REMEDIES, WARRANTIES, GUARANTIES OR LIABILITIES, EXPRESS OR IMPLIED,
ARISING BY LAW OR OTHERWISE (INCLUDING, WITHOUT LIMITATION, ANY IMPLIED
WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY AND ANY
REMEDIES OR LIABILITIES FOR LOST PROFITS OR CONSEQUENTIAL DAMAGES).  BUYER
ACKNOWLEDGES THAT HE IS NOT RELYING ON THE JUDGMENT OF ALCIDE CORPORATION TO
SELECT OR FURNISH COMPONENTS OR MATERIALS SUITABLE FOR ANY PARTICULAR PURPOSE
AND THAT ALCIDE CORPORATION MAKES NO WARRANTIES OTHER THAN ON THE FACE HEREOF.


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                                   "Confidential Treatment Requested.  The
                                   redacted material has been separately filed
                                   with the Commission."




                                      SCHEDULE D


                                         [*]











Discount levels determined [*] based on [*].

                                   [*] Volume/Gallons

                              Discount Rate

                                   [*]


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