Raw powder
For buyers who fill, formulate or repackage in their own facility. Quantity, container and documents are set in the quotation. Raw peptide materials →
SeqLine Bio · Bulk peptides
Bulk and wholesale
Bulk research peptides: raw powder or lyophilized vials.
We make bulk lots on our own line in Guangzhou and sell direct to laboratories, distributors and brands. Unit price steps down at 10, 100 and 1,000 kits. Production lots ship 7–15 business days after specification and payment confirmation, each with its own COA.
Terms
Bulk supply at a glance.
Most buyers start with a 1-kit sample, check it against its COA, then order the production lot.
The quotation names the contracting entity, payee, production site and releasing QC. See supplier verification.
| Formats | Raw powder, or lyophilized vials (1 kit = 10 vials) |
|---|---|
| Price steps | 10, 100 and 1,000 kits |
| Lead time | Production lots 7–15 business days after specification and payment are confirmed |
| Sample first | Samples from 1 kit for eligible products. Confirmed stock: within 3 business days after written payment confirmation; samples requiring preparation: 3–7 business days after specification and payment confirmation. Stock and the dispatch date are confirmed before payment. |
| Labels | Neutral by default; private label from 100 kits (1,000 vials) |
| Documents | COA for each lot, published in the COA library |
| Delivery terms | DDP for eligible products and destinations, confirmed in writing with the named place and included costs. Shipping & DDP → |
Formats
Raw powder or finished vials.
Lyophilized vials
Sealed vials, 10 per kit, under neutral label or your own label from 100 kits. Lyophilized vials → · Packaging details →
Documents per lot
What comes with every production lot.
COA
HPLC purity against our release specification of NLT 98.0%, MS molecular-weight identity, lot number, and manufacturing and test dates.
Public record
The COA is published in the COA library under the lot number on your vials or containers.
Your own testing
Independent testing is welcome. A confirmed quality issue is replaced or refunded under the quality policy.
RFQ checklist
What to include in a bulk RFQ.
| Compounds | Each peptide and the strength or amount you need |
|---|---|
| Format | Raw powder or lyophilized vials; neutral or private label |
| Quantity | Number of kits, or amount of raw powder |
| Documents | Any tests or paperwork you need beyond the COA |
| Destination | Country, city, postcode, consignee, company type and research use; DDP or other delivery term requested |
FAQ
Bulk order questions.
Can a bulk order start with a sample?
Yes. A sample starts at 1 kit (10 vials) for eligible products, with the COA for the lot supplied. Confirmed stock: within 3 business days after written payment confirmation; samples requiring preparation: 3–7 business days after specification and payment confirmation. Stock and the dispatch date are confirmed before payment.
Where do bulk prices step down?
At 10, 100 and 1,000 kits. The quotation shows the unit price at each step.
How long does a production lot take?
7–15 business days after specification and payment are confirmed.
Can bulk orders carry our own label?
Yes, from 100 kits (1,000 vials): your label, carton and insert. Otherwise vials ship under our neutral label.
Related: Quantity tiers · Private-label OEM · About our manufacturing
Next step
Send your compound list and target quantity.
We reply within 4 business hours with unit prices at each step, lead time and the documents for the lot.