Terms of Sale

These Terms of Sale govern all sales of materials by Kathors Peptides LLC doing business as Kathors Peptides ("Seller") to any purchaser ("Buyer"). They apply to every quotation, order, acknowledgment, and invoice.

These Terms govern purchases. Use of our website is governed separately by our Terms of Use.

Incorporated by reference and forming part of these Terms: the Research Use Disclaimer, Documentation Policy, Safety Information Policy, and Privacy Policy.

1. Definitions

Materials means any product supplied by Seller. Order means a request to purchase. Documentation means analytical or safety information Seller provides for a lot. Lot means a uniquely numbered production batch.

2. Formation of contract

Orders are placed by email or direct correspondence. No Order is binding until accepted in writing by Seller. Seller's quotation together with these Terms constitutes the offer; Buyer's Order constitutes acceptance.

Acceptance is expressly conditional on Buyer's assent to these Terms. Any additional or different terms in a Buyer purchase order, vendor portal, or other Buyer document are expressly rejected. If a Buyer document differs from these Terms, Seller's response shall be construed as a counter-offer and shall not operate as acceptance of the Buyer document. Seller's failure to object to any Buyer communication is not a waiver. Shipment does not constitute acceptance of any Buyer terms.

3. Eligibility and research use only

Materials are supplied for laboratory research use only. Materials are not drugs, supplements, foods, cosmetics, or medical devices, are not FDA-approved for any use, and may not be administered to or used in or on any human or animal, or used for any clinical, diagnostic, therapeutic, veterinary, or compounding purpose.

Buyer represents with each Order that it is 21 or older, is lawfully able to receive Materials, is acquiring them for laboratory research use, and will not permit any prohibited use. Buyer shall not resell, redistribute, repackage, relabel, dilute, or transfer Materials without Seller's prior written consent.

Seller may decline, suspend, or cancel any Order or account where Seller has reason to believe Materials may be used for a prohibited purpose, in its sole discretion, without liability beyond refund of the cancelled portion.

4. Pricing, payment, taxes

Prices are exclusive of taxes, duties, shipping, and handling; all amounts in U.S. Dollars. Quotations valid thirty (30) days. Payment terms as stated on the invoice. Past-due amounts accrue interest at one and one-half percent (1.5%) per month or the maximum permitted by law, whichever is less, plus costs of collection including attorneys' fees. Seller may require prepayment, suspend shipment, or stop delivery in transit on nonpayment. Buyer is responsible for all sales, use, and excise taxes except taxes on Seller's net income, and must provide a valid exemption certificate where claimed.

5. Shipping, title, risk of loss

Shipment is FOB Seller's facility. Title and risk of loss pass to Buyer upon delivery of Materials to the carrier. Delivery dates are estimates only. Seller may make partial shipments and invoice separately. Buyer is responsible for providing an address capable of receiving research materials.

6. Inspection and claims

Buyer must inspect promptly upon receipt. If external damage or shortage is visible, Buyer must note it on the delivery receipt before accepting from the carrier, retain all packaging, and submit photographs. Buyer must notify Seller in writing of any shortage, damage, or non-conformance within ten (10) business days of delivery; failure to notify constitutes acceptance. Seller may inspect before determining resolution. Seller's sole obligation is, at its election, replacement or refund of the purchase price.

7. Returns

Materials are non-returnable. Once Materials leave Seller's custody, storage conditions and chain of custody cannot be verified. This protects subsequent purchasers and is not waived. This does not limit Buyer's remedy under Section 6. Orders already picked, staged, or shipped may not be cancelled.

8. Documentation

Analytical documentation is provided as described in the Documentation Policy; requests should include the lot number. Documentation describes analytical properties of a lot. It is not a representation that Materials are safe, effective, or suitable for any application, and is not a warranty of fitness for any use in or on the body.

9. Safety and handling

Buyer is solely responsible for safe handling, storage, and disposal, for ensuring Materials are handled only by trained personnel with appropriate controls and protective equipment, and for compliance with applicable safety obligations including OSHA hazard communication. Research materials may present hazards that are not fully characterized. Absence of a stated hazard is not a representation that no hazard exists. See our Safety Information Policy.

10. Limited warranty and disclaimer

Seller warrants solely that, at time of shipment, Materials conformed to the identity and purity described in Documentation issued for the applicable lot.

THIS IS THE ONLY WARRANTY SELLER PROVIDES. SELLER DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT. SELLER MAKES NO WARRANTY OF RESULTS, SAFETY, STABILITY UNDER BUYER'S CONDITIONS, OR SUITABILITY FOR ANY RESEARCH APPLICATION OR FOR ANY USE IN OR ON THE BODY.

Determining suitability is Buyer's sole responsibility.

Warranty exclusions. Seller has no obligation for any claim arising from accident, disaster, or force majeure; misuse, fault, or negligence of Buyer; use for an unintended purpose; causes external to the Materials; improper storage or handling including any temperature excursion after delivery; or repackaging, relabeling, dilution, reconstitution, or alteration by anyone other than Seller. Non-conforming Materials do not include Materials that fail to meet Buyer's particular fitness of use or research application.

Third-party materials. Materials obtained from a third-party manufacturer are not warranted by Seller. Seller assigns to Buyer any warranty rights it holds, to the extent assignment is permitted.

11. Limitation of liability

TO THE MAXIMUM EXTENT PERMITTED BY LAW, SELLER'S TOTAL AGGREGATE LIABILITY ARISING FROM OR RELATED TO ANY ORDER, WHETHER IN CONTRACT, TORT, INDEMNIFICATION, OR OTHERWISE, SHALL NOT EXCEED THE AMOUNT PAID BY BUYER FOR THE SPECIFIC MATERIALS GIVING RISE TO THE CLAIM.

IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL, EXEMPLARY, OR PUNITIVE DAMAGES, OR FOR LOST PROFITS, LOST DATA, LOST OR INVALIDATED RESEARCH, EXPERIMENTAL LOSS, OR BUSINESS INTERRUPTION, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

SELLER SHALL HAVE NO LIABILITY WHATSOEVER ARISING FROM ANY USE OF MATERIALS IN OR ON ANY HUMAN OR ANIMAL, OR FROM ANY OTHER PROHIBITED USE.

These limitations apply regardless of the failure of any limited remedy of its essential purpose. Nothing here limits liability that cannot be limited under applicable law.

12. Indemnification

Buyer shall indemnify, defend, and hold harmless Seller and its owners, officers, employees, and agents from any claim, loss, liability, damage, cost, or expense including reasonable attorneys' fees arising from: Buyer's use, handling, storage, transfer, or disposal of Materials; any administration of Materials to or use in or on any human or animal; any resale, repackaging, or relabeling by Buyer; Buyer's breach of these Terms; or Buyer's violation of any law. Buyer's duty to defend arises at first notice of a claim and extends to fees incurred by Seller in enforcing this Section.

13. Compliance and export

Buyer is responsible for compliance with all applicable federal, state, local, and institutional requirements governing receipt, possession, use, storage, transport, and disposal, including any institutional approval required.

Buyer represents it is not a denied, debarred, blocked, or restricted party under any list maintained by the U.S. Departments of Commerce, State, or Treasury; is not owned or controlled by or acting on behalf of any such party; and will not export, re-export, or transfer Materials in violation of U.S. export control or sanctions law.

Seller reserves the right to screen any Buyer against U.S. government restricted party lists at any time, to request additional information regarding the Buyer or end use, and to decline, suspend, or cancel any Order or account on that basis. Seller reserves the right to decline any Order to any destination.

14. California Proposition 65

Buyers who resell or redistribute Materials in California, where permitted under Section 3, are responsible for their own Proposition 65 compliance.

15. Confidentiality

Pricing, discounts, quotations, and technical information provided by Seller are Seller's confidential and proprietary information. Buyer shall not disclose them to any third party and shall use them solely for Buyer's internal purposes. This does not restrict information available to the general public.

16. Force majeure

Neither party is liable for failure or delay in performance, other than payment obligations, caused by conditions beyond its reasonable control, including natural disaster, fire, flood, epidemic, war, terrorism, civil unrest, labor action, governmental or regulatory action, carrier failure, supply chain disruption, utility failure, or network disruption.

17. Governing law and venue

These Terms are governed by the laws of the State of California, without regard to conflict-of-laws principles. The U.N. Convention on Contracts for the International Sale of Goods does not apply. The parties consent to the exclusive jurisdiction of the state and federal courts located in California.

JURY WAIVER. IN ANY PROCEEDING BETWEEN THE PARTIES RELATING TO THESE TERMS, EACH PARTY WAIVES ANY RIGHT TO TRIAL BY JURY IT MAY OTHERWISE HAVE.

LIMITATIONS PERIOD. REGARDLESS OF ANY CONTRARY STATUTE, ANY SUIT ARISING OUT OF THESE TERMS MUST BE FILED WITHIN ONE (1) YEAR FROM THE DATE THE CAUSE OF ACTION AROSE.

18. General

Entire agreement. These Terms, the incorporated policies, any executed End User Statement, and the applicable order acknowledgment constitute the entire agreement. Assignment. Neither party may assign without the other's written consent, except to a parent, subsidiary, or successor. Severability. If any provision is unenforceable, the remainder continues. Waiver. No waiver is effective unless in writing. Survival. Sections 3, 6–17 survive termination. Amendment. Seller may revise prospectively; the version in effect when an Order is accepted governs that Order. Superseded versions are archived.

19. Contact

Kathors Peptides · California, USA. Questions about these Terms? Use the contact form on our website.

Version 1.0 · Effective August 14, 2026