Northline exists because too many research peptides ship with a label and nothing else. We built the catalog around the paperwork: a matched certificate of analysis, a real spec sheet, and a team that answers questions.
Every production lot is sent to an independent lab for reverse-phase HPLC purity analysis and mass-spec sequence confirmation before it's released for sale. The resulting certificate of analysis — purity percentage, method, and lot ID — ships with your order and is available on request before you buy.
We don't blend lots to hit a marketing number, and we don't sell out-of-spec material at a discount. If a lot fails QC, it doesn't go out.
Cart or contact form — both go to the same team. Nothing here runs on an automated checkout.
A team member confirms your order, quantities, and shipping details before anything is fulfilled.
Vials are packed with ice packs in insulated shippers, matched to a tested, in-date lot.
Your certificate of analysis and handling guidance arrive alongside the shipment.
Happy to send lot-specific documentation ahead of purchase for research or institutional review.