EDQM FAQs / EDQM FAQs in English / PRODUCTS AND SERVICES (Publications, Reference standards, CombiStats) / EDQM reference standards / General information on EDQM reference standards / Where can I find the content assigned to a reference standard used in an assay?

Answer:

When required by the prescribed test and/or assay of the corresponding Ph. Eur. text, the content a CRS is given in the leaflet available in the Ph. Eur. reference standards database .

For impurity CRSs used for quantification in the related substances test of the corresponding Ph. Eur. monograph, the content can be assumed to be 100%, unless otherwise indicated in the leaflet.

In all other cases, no value is assigned and no assumption can be made on the purity or content of the reference standard.