Premium Research Peptides

"Premium" is an overused word in the research-peptide space — used loosely by suppliers whose actual QC would not survive an independent audit. At BioInfinity we treat "premium" as a specification, not marketing copy. It means: ≥99% HPLC purity, ESI-MS identity confirmation within ±0.5 Da, endotoxin below 0.5 EU/mg by LAL, and a batch-matched third-party COA from Verum Analytics in Switzerland. Every batch. Every peptide. Every time.

Every peptide is synthesized in-house at our Manhattan, New York facility using Fmoc solid-phase peptide synthesis (SPPS). Crude products are cleaved from resin with a TFA/scavenger cocktail, precipitated with cold ether, and purified on a preparative reverse-phase C18 column. Only fractions ≥99% area-under-peak at 214 nm are pooled; the final pool is desalted and lyophilized to a fluffy white powder.

Retained samples of every batch are sent to Verum Analytics for independent verification. The resulting Certificate of Analysis is signed, dated, matched by lot number to the vial you receive, and — this is the important part — publicly browsable in our /coa-library with no login required. This transparency is the entire reason serious research groups have made BioInfinity a repeat supplier.

Every premium research peptide ships in cold-chain packaging when the transit route requires it, in a discreet plain unbranded outer box with only the address on the label. Orders in by 3 PM ET Monday–Friday leave our facility the same afternoon.