COA & testing
Third-Party HPLC and Mass Spec Testing: Why Both Are Required
2026-05-12 · 5 min read
Purity and identity are two different questions, and one assay cannot answer both.
What HPLC tells you
Chromatographic separation quantifies the main peak against everything else in the sample. It is the source of the purity percentage — but a very pure sample of the wrong molecule still reads high.
What mass spectrometry tells you
Observed molecular mass compared against the theoretical mass confirms the compound is what the label says. It is the only defense against substitution.
Why independence matters
In-house data from the manufacturer is a process control, not a release criterion. Independent assay is what makes the number auditable.
Ordering, minimums, and pricing
Every SKU is priced per vial and sold in sealed ten-vial kits with a one-kit minimum. Volume tiers: 1 kit at list, 2 kits at 5% off, 3 kits at 7% off, 5 kits at 12% off, and 10 kits at 20% off. Domestic orders received by 2PM PT dispatch the same business day, and freight is free above $2,500.
All compounds are sold as chemical reagents for laboratory research use only — not for human or veterinary use.
Frequently asked
- What is the minimum order?
- One ten-vial kit of any in-stock SKU. Mix compounds freely to reach a volume tier.
- Do orders include a certificate of analysis?
- Yes — lot-specific, with third-party HPLC purity and mass-spec identity.