Quality
Purity you can verify.
Every compound released through East Coast Labs is tested to 99%+ purity by HPLC and identity-confirmed by LC-MS before it ships.
99%+ purity threshold
We set a 99%+ purity floor. Any batch that does not pass testing is not released, regardless of cost or timing.
HPLC quantification
High-Performance Liquid Chromatography is used to separate and precisely quantify purity for each batch.
LC-MS identity
Liquid Chromatography–Mass Spectrometry confirms molecular identity and weight independently from purity testing.
Certificate of Analysis
Batch documentation, not marketing.
Every product on East Coast Labs carries a Certificate of Analysis (COA) generated from the actual test run on that specific batch. It captures the compound name, CAS number, purity result, test method, and the date of analysis.
COA documents are linked directly on each product page and served securely. You see the same data the lab produced — no summaries, no rounding.
Test methods
Standards we test against.
Reverse-phase HPLC
Gradient elution with UV detection at 214 nm and 254 nm. Purity reported as area-under-curve percentage against all detected peaks.
ESI-LC-MS
Electrospray ionisation mass spectrometry confirms the observed m/z matches the theoretical monoisotopic mass for the target sequence.
Release criteria
Batch purity 99%+ and confirmed molecular identity are both required before a compound is listed for sale or shipped.