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.
What's included in every COA and how to request one before you order.
How every lot is verified, and what happens when one fails.
What reverse-phase HPLC actually measures, and why it's paired with mass spec.
Storage temperatures by compound, and handling notes after reconstitution.
Packaging standards and international shipping documentation.
What "research use only" means, and who our products are intended for.
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.