Colour and appearance

White crystalline needles

Solubility

Freely soluble in Methanol, Ethanol, and Acetone

Solubility in water

Insoluble in water

Ash content

Less than 0.5%

Moisture content

Less than 1%

Melting Point

141-143 °C

Heavy metals

Less than 20 ppm

Assay

By HPLC, Not less than 98%

Method of analysis

AOAC Official methods of analysis 1990