性状
白色片状晶体,有光泽。 易溶于水,微溶于乙醇,不溶于。
熔点 220-240 °C (dec.)
溶解度 H2O: 1 M at 20 °C, clear, colorless
双甘肽 质量标准
Item
Standard
State of solution Clear and colorless
(Transmittance) Not less than 95.0%
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 30ppm
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 0.20%
Residue on ignition(sulfated) Not more than 0.15%
Assay 98.5 to100.5%