The lab, in plain words.

A unique registry number assigned to a chemical substance by the Chemical Abstracts Service.

The lab report for one lot. It lists every test run on that lot, the method, the result and the release limit.

Fragments of bacterial cell walls. Screened by the LAL assay and reported against a release limit.

High-performance liquid chromatography. Separates a sample into its components so the target peptide's share can be measured as purity.

Inductively coupled plasma mass spectrometry. Detects trace metals such as lead, arsenic, cadmium and mercury.

A titration that measures residual water in a dry sample.

Limulus amebocyte lysate test, the standard screen for bacterial endotoxin.

One batch of a compound, synthesised and filled together. Every vial in a lot shares one certificate.

Freeze-dried. Water is removed under vacuum, leaving a dry cake that is stable to ship and store.

Measures molecular weight. Used to confirm identity: the measured mass must match the compound's theoretical mass.

The mass of one molecule in daltons (Da), calculated from its formula.

How much peptide is actually in the vial, as opposed to purity, which is a share of what is there.

The percentage of the sample that is the target compound, measured by HPLC peak area.

Sold for in-vitro laboratory research. Not for human or animal use, and not evaluated by the FDA.

One amino acid unit within a peptide chain. A 15-residue peptide has fifteen amino acids.

The order of residues in a peptide, read from the N-terminus to the C-terminus.

A test that incubates the sample to confirm no microbial growth.