Questions about certificates

Start with the lot code: it should match the code printed on your vial. Then check the document ID and version against this site.

Each table is one test. The specification is the limit the result is checked against; the result is what the laboratory measured; the laboratory's verdict says whether the result meets the specification.

ND means not detected. A result shown as less than a number, with "below LOQ" or "below LOD", means the laboratory found less than it can reliably measure.

Some certificates name the company they were prepared for: the seller, or a brand together with its own SKU. Other copies name no one.

Every copy of the same lot carries the same laboratory results. Only the "Prepared for" line, and a brand's name and SKU on a brand copy, differ.

Check the code as printed on the label. Lot codes are not case sensitive and usually look like ABC-7K2QM. Generated codes never use the letters I, L, O or U, so a character that looks like an O is a zero.

You can also enter the document ID printed under the QR code on the certificate (it starts with COA-).

Only released lots can be looked up. If the code still is not found, contact the seller you bought from, or write to us at contact@assaylinelabs.com with the code and where you bought the product.

A certificate reports the tests performed on a sample of one lot, and only those tests. Each test answers one question: purity by HPLC does not confirm identity, and identity by LC-MS does not measure quantity. The Testing page lists what each test tells you and what it does not.

Results describe the sample tested. A certificate makes no claim of safety or efficacy for any use, and the products it covers are for research use only.

The partner laboratory named on each certificate performs the analyses and issues its own report. AssayLine Labs prepares the certificate from that report, publishes it and keeps it verifiable here. AssayLine Labs does not perform laboratory testing.

This site. A certificate can be replaced by a corrected version, and a lot can be put on hold or recalled after its certificate was printed. The page for a certificate always shows its current status.

A newer version of the certificate was issued, for example to correct a detail. The notice links to the current version. Only the current version's PDF can be downloaded.