Item

Limit

Appearance

 White or colorless

crystal

Particle Size

20-80MESH 

Assay

65% to 99.99%

state of solution

(transmittance)

Clear and colorless not less than 65.0%

chloride (cl)

Not more than 0.039%

Ammonium(NH4)

Not more than0.02%

Sulfate(so4)

not more than 0.028%

Iron (Fe)

Not more than 5PPM

Heavy metals (pb)

Not more than 5 PPM

Arsenic (ASO3)

Not more than 0.5PPM

Other amino acids

Conforms

Loss on drying

Not more than 0.31%

specific rotation (a)20

+24.4 ~+25.3

PH

6.7~7.2