Quality & documentation notes
Isotopic Enrichment Explained: Reading Labelled Standard Specs
Two labelled standards can both claim 98 percent and still perform very differently. How to read enrichment, isotopic purity and label position on the certificate.
13 Oct 2026 5 minQuality & documentationPurity vs Assay vs Potency: Three Numbers, Three Meanings
A material can be 99.9 percent pure by HPLC and still assay at 95 percent. What purity, assay and potency each measure, and which one to use when.
04 Oct 2026 5 minQuality & documentationHow to Qualify a Secondary Standard Against a Primary One
Pharmacopoeial standards are costly and rationed. A properly qualified secondary standard cuts that cost without weakening traceability. Here is how to do it.
22 Sep 2026 5 minQuality & documentationCertificate of Analysis Red Flags Every Buyer Should Catch
A certificate of analysis can look complete and still be weak evidence. These are the warning signs QC and procurement teams should check before releasing a lot.
13 Sep 2026 5 minReading up before you buy?
When you know what you need, add the products to your quote list or paste a CAS list. One enquiry covers price, lead time, documents and freight.