BioxPeptidex peptides are released to a specification of ≥99% purity. Purity is measured by reverse-phase HPLC (High-Performance Liquid Chromatography) and confirmed by mass spectrometry. A lot-specific Certificate of Analysis documenting the measured purity is posted on each product page.

A Certificate of Analysis is a document issued by our quality control lab confirming the identity, purity, and concentration of the compound in a specific production lot. It includes the lot number, HPLC purity percentage, mass spec confirmation of molecular weight, and testing date. Each CoA is lot-specific and traceable.

Lyophilized peptides must be brought back into solution before analytical work. A 10mL bottle of reconstitution solution is included free with every order, calibrated to the compounds purchased. We do not provide reconstitution volumes, concentrations, or protocols. Determining the appropriate diluent and volume for a given experiment is the responsibility of the researcher.

Lyophilized (freeze-dried) peptides should be stored at -20°C in a sealed container, protected from light and moisture. Reconstituted peptides should be stored at 4°C and used within 28 days. Avoid repeated freeze-thaw cycles, which can degrade peptide integrity.

Lyophilized peptides stored correctly at -20°C are stable for 24 months or longer. Stability varies by sequence — peptides containing cysteine, methionine, or glutamine may have shorter shelf lives. Once reconstituted, stability is typically 4 weeks refrigerated.

Orders with all items in-stock ship within 24 hours of being placed. Because our peptides are lyophilized, cold shipping is not required for standard transit times. For longer transit or warmer climates, cold pack shipping is available at checkout to ensure stability across Mexico.

We currently ship nationwide across Mexico utilizing secure logistical networks optimized for research materials.

Yes. We offer preferred pricing for qualified businesses and academic institutions that order in volume. There are no strict minimum order quantities for standard purchases, but tiered discounts apply at higher volumes. Contact us directly for preferred pricing and discounts — we'll work with you to set up a professional account.

All sales are final. However, if a product arrives damaged or tests below its stated purity specification upon independent verification by the customer, we will reship the product. Please contact us with your order number and documentation and we will take care of it.

You can reach our team through the Contact page on this website. We respond to all inquiries within one business day. For order-related questions, please have your order number ready.