Check Item

Specification

Identification

In accordance with the IR absorption spectrum of the standard

Appearance

  White Crystals or  

White Crystalline Powder

 Particle size (mesh)

Through 20mesh

Specific rotation

-27.0~ -29.0

pH

2.3~2.6

Loss on drying

≤0.50%

Residue on ignition

≤0.50%

Assay

98.0%～102.0％

Heavy metal

≤10ppm

Lead （Pb） 

≤3ppm

Cadmium (Cd)

≤1ppm

 Mercury （Hg） 

≤0.1ppm

Arsenic (As)

≤1ppm

TPC

≤1000Cfu/g

Yeast & Mold

≤100Cfu/g

E.Coli

Negative 

Salmonella

Negative