[Triamcinolone Reference Standard (Control 981) of National Institute of Health Sciences]

The raw material of triamcinolone was examined for preparation of the "Triamcinolone Reference Standard (Control 981)". The analytical data obtained were: melting point, 246 degrees C (decomposition); UV spectrum, lambda max of 239 nm and specific absorbance in methanol at 289 nm of 394; IR spectrum, specific absorptions at 3462, 1716, 1659, 1615, 1604, 1132 and 1061 cm-1; optical rotation, [alpha]D20 = +69.7 degrees; high-performance liquid chromatography, five impurities detected and amount of each impurity estimated to be less than 0.6% and total amount of impurities less than 1.4%; loss on drying, 0.24%. Based on the above results, the raw material was authorized as the Triamcinolone Reference Standard (Control 981) of the National Institute of Health Sciences.