【CAS】63-68-3
【Properties】Colorless or white glossy flaky crystals or white crystalline powder, with a slightly special smell and slightly bitter taste.
【Appearance】White flake crystal or powder
【Purity】99.93%
【PH】5.95 (1% aqueous solution)
【Loss on drying】≤0.05%
【Heavy metal (calculated as Pb)】≤0.001%
【Scope of application】It is used for biochemical research and nutritional supplements, and can be used as food and feed additives.
【Storage】Store in a cool, dry, clean and shading environment. It is strictly forbidden to mix with toxic and harmful substances to avoid pollution.
| Specification | Standard | Test results |
| Appearance | White crystals or crystalline powder | Conform |
| Specific optical rotation | +23.0°~+24.5° | Conform |
| State of solution | ≧98% | 98.5 |
| Chloride(CL) | ≦0.020% | 0.00% |
| Ammonium | ≦0.02% | 0.01% |
| Sulphate(SO4) | ≦0.02% | 0.02% |
| Iron(Fe) | ≦10ppm | 2ppm |
| Heavy metals(Pb) | ≦10ppm | 1ppm |
| Arsenic salt | Not more than 1ppm | 0.1ppm |
| Organic volatile impurities | Meets the requirements | Conforms |
| Loss on drying | ≦0.4% | 0.15% |
| Residue on ignition | ≦0.1% | 0.07% |
| Assay | 99.0%-100.5% | 99.50% |
| pH | 5.6-6.1 | 5.9 |
| Conclusion: | The above specifications meet the requirements of USP36 | |