Characteristics

White or almost White crystals Crystalline Powder

Identification

Positive Reaction

Melting Point

About 190℃

PH

2.4-2.8

Clarity Of Solution

Clear

Colour Of Solution

≤BY7

Loss on drying

≤0.4%

Copper

≤5ppm

Heavy Metals

≤10ppm

Iron

≤2ppm

Mercury

≤1ppm

Lead

≤2ppm

Arsenic

≤3ppm

Oxalic Acid

≤0.2%

Sulphate Ash(Residue On Ignition)

≤0.1%

Specific Optical Rotation

+20.5°–+21.5°

Organic Volatile Impurities

Pass

Assay

99.0%-100.5%