A fixed standard, independently measured and transparently documented.
Purity is a measurement, not a marketing claim. Every batch is analysed by an independent laboratory and released only when the result meets the criteria below — and the resulting certificate is published against the batch number printed on the vial.
Release criteria
Each batch is assessed against the same five checkpoints. A batch that fails any one of them is not listed for sale, regardless of how close the result is to threshold.
- Purity — ≥99% by reverse-phase HPLC with UV detection at 214 nm.
- Identity — confirmed by LC-MS against the expected molecular mass.
- Appearance — a correctly lyophilised white to off-white cake or powder.
- Packaging — a sealed, intact vial carrying its batch number and expiry.
- Documentation — a certificate issued by the independent testing laboratory.
Reading a certificate
Certificates are published online and can be viewed at any time; they are not printed and posted with orders. Match the batch number on your vial to the batch number on the certificate, then check the purity figure, the identity confirmation and the date of analysis.
Supplied for laboratory research use only. Not for human or veterinary use.