Product Description

ITEMSTANDARD

AppearanceWhite or  almost  white crystal  or  crystalline powder

Identification  Positive

Melting point 191 ℃  ~  192℃ 

pH (5%,  w/v)  2.2 ~   2.5 

pH (2%,w/v)  2.4 ~   2.8 

Specific optical  rotation +20.5°  ~  +21.5°  

Clarity  of  solutionClear 

Heavy metals≤0.0003% 

Assay (as C 6H 8O6, %) 99.0  ~  100.5 

Copper≤3 mg/kg

Iron≤2 mg/kg

Mercury≤1 mg/kg 

Arsenic≤2 mg/kg 

Lead≤2 mg/kg

Oxalic acid≤0.2%

Loss   on drying≤0.1%

Sulphated ash≤ 0.1%

Residual solvents (as methanol)≤ 500  mg/kg 

Total  plate count (cfu/g)≤ 1000

Yeasts  & molds (cfu/g)≤ 100  

Escherichia.  Coli/g Absence 

Salmonella/  25g Absence 

Staphylococcus aureus/ 25g Absence

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