The directory is the front door, but a large part of lab procurement runs through requests for quote. An RFQ lets a verified buyer describe the peptide, purity floor, form, pack size and quantity once, and have multiple verified sellers respond on price and lead time.
Responses arrive as quotes that the buyer can compare in a single view - no email chains, no re-typing specifications. When a quote is accepted it flows straight into the same order pipeline as a catalogue purchase, with the same attestation and COA gates applied.
For institutions with established credit relationships, NET terms add a payable layer on top of the standard checkout. Eligibility is managed on the account page, and every transaction remains logged for compliance review.