L-Pyroglutamic Acid
CAS: 98-79-3
Molecular formula: C5H7NO3
Molecular weight: 129.11
Appearance: White crystalline powder
Specific Rotation(α)D20 (C=2,H2O): -11.0° to -12.0°
Transmittance: Not less than 98.0%
Melting Point (°C): 158°C to 161°C
Chloride (C1): ≤ 0.02%
Ammonium (NH4): ≤ 0.02%
Sulfate (SO4): ≤ 0.02%
Heavy Metals (Pb): ≤ 10 ppm
Iron (Fe): ≤ 10 ppm
Arsenic (As2O3): ≤ 1 ppm
Loss on Drying: ≤ 0.50%
Residue on Ignition: ≤ 0.1%
Assay: 98.5-101.0%
