What ‘research-grade’ actually means.

A genuine research-grade supplier publishes batch-specific HPLC chromatograms — not just a percentage. The certificate should name the analytical method, detector wavelength, and acceptance criteria. ‘≥98% pure’ on a stock template is not the same as a real chromatogram with peak data.

Verify · Look for: HPLC purity ≥ 98%, named method (e.g. RP-HPLC at 220 nm), batch-specific peak data.

Anything intended for injectable research use should have documented endotoxin testing — typically LAL (Limulus Amebocyte Lysate). The result should be expressed in EU/mg with a defined acceptance limit. Suppliers who silently omit this test are not research-grade, regardless of marketing language.

Verify · Look for: LAL endotoxin testing, result reported in EU/mg, batch-level disclosure.

A real COA names the batch, the manufacturing date, the testing date, the testing facility, the analyst, and the analytical methods. Stock COAs that show identical purity numbers across multiple batches are a red flag — they cannot be batch-specific by definition.

Verify · Look for: batch lot number, manufacture date, test date, named analyst, named lab.

Lyophilised peptides should be reconstituted with bacteriostatic water under sterile conditions. Suppliers operating at research-grade publish information on sterile filtration (typically 0.22 µm), filling environment (ISO Class, laminar flow), and bioburden testing. Silence on sterility is not neutrality — it is information about the supplier.

Verify · Look for: 0.22 µm sterile filtration, fill environment disclosure, bioburden testing.

If you cannot identify who you are dealing with, you have no recourse — regulatory, civil, or commercial. A research-grade supplier publishes a registered company name, business number (ABN, EIN, VAT, or local equivalent), and a verifiable physical address. Anonymity in this market is a structural risk, not a privacy feature.

Verify · Look for: registered company name, business number, verifiable physical address.

In-house testing is necessary but insufficient. Research-grade suppliers send batches to a named, accredited third-party laboratory (NATA, ISO 17025, or equivalent) and publish the lab's name. ‘Tested by an independent lab’ without naming the facility is functionally equivalent to no testing — it cannot be verified.

Verify · Look for: named third-party lab, accreditation status, published methodology.