Appearance

white crystalline powder

Absorption coefficient

605-639

Clarity and colour of solution

clear and colourless

Drying Loss

≤4.0%

Residue on ignition

≤0.1%

Heavy metal

≤10ppm

Volatile organic impurity

Meets the specifications

Limit of guanine

≤0.7%

Assay

98.5%-101.0%