Appearance: white or almost white powder with faint characteristic odour.
Solubility: Slightly soluble in water & chloroform,soluble in alcohol.
Identification: IR of sample and standard are concordant.
Water content :not more than 6.0 %
pH-value: 6.0-8.0
Sulfated ash: not more than 1.0 %
Assay: (microbiological):
not less than 750 mcg/mg based on the anhydrous substance