Antipyrine impurity standards
For Antipyrine, the Zemixal catalogue holds 6 impurity and reference standards that support release testing, stability programmes and regulatory dossiers. Counted by type, there are 2 nitrosamines, 1 isotope-labelled standard and 1 metabolite or hydroxylated analogue.
Every standard comes with a certificate of analysis. Structure confirmation data, typically NMR, MS and chromatographic purity, is available on request. They are bought for system suitability, peak identification, quantitation against limits and the impurity justification sections of regulatory submissions. For nitrosamine risk evaluation, the N-nitroso standards allow confirmatory LC-MS testing against the acceptable intake limits.
By impurity type
Counts are based on product names. One compound can fall into more than one type.
