Item

Standard (USP)

Properties

white crystal powder

Specific Optical Rotation

+50°—+52°

PH (5% solution,20°C)

3.0—5.0

Iron ion

≤10PPM

Heavy Metals

≤10PPM

Loss on Drying

≤1.0%

Assay

98.0%-102.0% (as dry)

Residue on Ignition

27.0—29.0%

Chloride

11.1—12.3%

Sulfate

15.5%-16.5%

Organic volatile impurities

meets the requirements

Microbiological Test Total plate count Yeast&mold Salmonella E.Coli

MAX 500/gMAX 100/gnegative negative

Package and storage

Shelf life