Research peptide manufacturer · Guangzhou, China
Synthesis, purification, lyophilization, QC and packaging under one roof. Start with one kit, read the batch COA before you pay, then scale to bulk or your own label.
Our facility
Three ways to buy
Sample kit
1 kit10 vials, most catalog compounds
Bulk & wholesale
10 · 100 · 1,000kit price steps
Private label
100 kits1,000 vials minimum run
Catalog
Most requested
How an order runs
Batch records
53 current batch records, open to anyone: no login and no WhatsApp request. Each one shows:
Supplier due diligence
What is public, which documents follow an RFQ, and how to check who you contract with, who you pay, who makes it and who tests it.
The factory
SeqLine Bio is a peptide manufacturer in Guangzhou. We sell direct to laboratories, distributors and brands, and we do not sell to consumers or give dosing advice.
| Location | Science City, Huangpu District, Guangzhou, China |
|---|---|
| We make | Research-grade raw powder and lyophilized vials |
| Packaging | Neutral label by default; private label from 100 kits |
| We sell to | Qualified B2B buyers, research use only |
| Check us | Company fact sheet · Supplier verification · Compliance |
Where we ship
DDP shipping is available for eligible products and destinations, with clearance, duties and import taxes confirmed in the written quote. Shipping & DDP terms → Product eligibility and local requirements are checked for each order.
FAQ
Research laboratories, raw-material distributors, formulation teams and brands launching private-label peptide lines. We sell B2B only.
Yes. Synthesis, purification, lyophilization, QC testing and packaging run on our own line in Guangzhou. The production site and the releasing QC for your lot are named in the quotation.
One kit (10 vials) for most catalog compounds. It comes with the batch COA showing HPLC purity and MS identity, so you can test the material before ordering more.
We reply within 4 hours during business hours. Confirmed ready-to-ship orders, including samples from released stock, dispatch within 3 business days after written payment confirmation. Samples requiring preparation: 3–7 business days; production and private label: 7–15 business days after the agreed conditions are complete. Private label also requires artwork approval. Transit and customs are additional.
Our release specification is NLT 98.0% by HPLC. The actual result for each lot is printed on its public COA, together with MS identity.
Yes, from 100 kits (1,000 vials): your label, carton and insert on our vials. Send artwork or a short brief with your RFQ.
We reply with price, lead time and a COA preview. No payment link is sent until your company details, destination and research use are confirmed.
Guides: Reading a COA, HPLC and MS · Independent testing · Manufacturer vs reseller · Bulk supply terms
Next step
List the compound, quantity, format, destination and the documents you need. Price, lead time and batch records come back within four business hours.
