L-Glutamic acid

Item
Standard

Appearance
White crystals or crystalline powder

Specific rotation[α]20/D
(C=10 in 2N HCl)
+31.5 to +32.4°

State of solution

(Transmittance)
Clear and colorless not less than 98.0%

Chloride (Cl)
Not more than 0.020%

Ammonium (NH4)
Not more than 0.02%

Sulfate (SO4)
Not more than 0.020%

Iron (Fe)
Not more than 10ppm

Heavy metal(Pb)
Not more than 10ppm

Arsenic(As2O3)
Not more than 1ppm

Other Amino Acids
Chromatographically

Not detectable

Loss on drying
Not more than 0.10%

Residue on ignition(sulfated)
Not more than 0.10%

Assay
99.0% to 100.5%

pH
3.0 to 3.5