Every dye marketed by PROIMAGING is accurately manufactured and analyzed in order to comply with strict specifications of quality and purity.

A certificate of analysis is available on the website www.proimaging.fr for every delivered dye. This certificate summarizes the analytical data obtained by elaborated techniques used by PROIMAGING :

• Nuclear magnetic resonance used to determine the chemical structure of the dye. Proton and 13C NMR are used routinely and 2D-NMR is also used for obtaining a more accurate information on the heterocycles structures of the dye molecule.

• High pressure liquid chromatography with diode array detection (HPLC-DAD) or coupled with mass spectrometry (HPLC-MS) is used for determination of the purity and also confirmation of the dye structure as the elucidation of its potential impurities.

• Quality Assurance: every dye is manufactured and analyzed according to a system of documentation allowing a good traceability and a good consistency of the chemical quality and activity of our dyes.

 • Tests of activity: the efficiency of our dyes is checked on various substrates in order to guarantee the best satisfaction to our customers.