1. Business identity
- A legal business name, a business address and a monitored business email address.
- Written quotes before payment, with quote validity and payment terms stated in writing.
- A published research-use-only position and published policies (terms, returns, privacy).
2. Documentation for the exact lot you will receive
- A Certificate of Analysis (COA) whose lot number matches the label on the vial.
- Identity: which method confirmed it (for example, mass spectrometry) and the observed versus expected mass.
- Purity: which method (for example, HPLC) and what the percentage describes — the main peak's share of the detected peaks.
- Net peptide content versus gross weight, where reported: lyophilized powder also contains water and counter-ions.
- The date of analysis and who performed it.
3. Questions that separate suppliers
- Is the lot on the vial the lot on the document?
- Will the same lot, or a documented successor lot, be available when you reorder?
- How are quotes, reorders and documentation requests handled, and who answers them?
4. Commercial planning
- The unit of sale (at Bulk Peptide Blends: boxes of 10 vials).
- Quantities per product and the timing window you are planning for.
- Your expected reorder cadence, so continuity of supply can be planned.
5. Red flags
- Payment only in cryptocurrency, or contact only through messaging apps.
- “Guaranteed” purity marketing without lot documents.
- Any human-use, dosing or treatment claims.
- Documents that cannot be tied to a specific lot.
6. How Bulk Peptide Blends handles these
- Research use only, for qualified business buyers.
- Wholesale in boxes of 10 vials, and every order is quoted in writing.
- Formulated, Filled, Lyophilized & Tested in the USA
- Documentation is part of every sourcing conversation with qualified buyers. See the Quality page.
Printable questionnaire
| Question | Supplier answer | Verified? |
|---|---|---|
| A legal business name, a business address and a monitored business email address. | ||
| Written quotes before payment, with quote validity and payment terms stated in writing. | ||
| A published research-use-only position and published policies (terms, returns, privacy). | ||
| A Certificate of Analysis (COA) whose lot number matches the label on the vial. | ||
| Identity: which method confirmed it (for example, mass spectrometry) and the observed versus expected mass. | ||
| Purity: which method (for example, HPLC) and what the percentage describes — the main peak's share of the detected peaks. | ||
| Net peptide content versus gross weight, where reported: lyophilized powder also contains water and counter-ions. | ||
| The date of analysis and who performed it. | ||
| Is the lot on the vial the lot on the document? | ||
| Will the same lot, or a documented successor lot, be available when you reorder? | ||
| How are quotes, reorders and documentation requests handled, and who answers them? | ||
| The unit of sale (at Bulk Peptide Blends: boxes of 10 vials). | ||
| Quantities per product and the timing window you are planning for. | ||
| Your expected reorder cadence, so continuity of supply can be planned. |
Compare quotes like for like
Two quotes with the same total can describe different offers. Compare the scope before the price: put each quote in its own column and fill in every row.
| What to compare | Quote A | Quote B |
|---|---|---|
| QuantityHow many units, in what pack size? Convert both quotes to the same unit (vials or boxes) before comparing totals. | ||
| FormatWhat does each vial contain as labeled, and is the form the same (for example, lyophilized powder)? | ||
| DocumentationIs a certificate of analysis provided for the exact lot you will receive, and which methods does it report? | ||
| FulfillmentIs the product on hand or made to order, and what timing does the supplier state in writing? | ||
| Commercial termsHow long is the quote valid, what are the payment terms, and what is included in the total (for example, shipping)? |
A lower total may describe a different offer. Ask the supplier to explain differences in writing.
General procurement information for business buyers, not a statement about any specific lot. Products are for research use only and are not for human or veterinary use.
