Items

Quality index

Results

Appearance

white or off-white crystal or crystalline solid

      white crystalline solid

M.P.

171－175℃

      174.5－175.2℃

Relative matter

meet the standard

meet the standard

Assay

98.5－101%

99.87％

Residue on ignition

＜0.2％

0.050％

Loss on drying

＜0.5％

0.05％

Chloride

＜0.03％

＜0.03％

UV（λmax ）

248nm

       max 247nm

IR

Complies with control atlas

     Complies

Heavy metals

≤10ppm

meet the standard