ITEM | SPECIFICATION | METHOD REFERENCE |
Appearance | White crystalline powder | Visual |
Ammonium | ≤200ppm | Glutathione USPmonograph |
Chloride | ≤200ppm | USP35<221> |
Sulfate | ≤300ppm | USP35<221> |
Arsenic | ≤2ppm | USP35<211> |
Heavy metals | ≤10ppm | USP35<231>Method I |
Loss on drying(3h at 105 ºC) | ≤0.5% | USP35<731> |
Residue on Ignition | ≤0.1% | USP35<281> |
L-glutathione oxidized | ≤1.5% | Glutathione USP |
Total impurities | ≤2.0% | Glutathione USP |
Assay(dry basis) | 98.0% to 101.0% | Glutathione USP |