【CAS No.】616-91-1
【Molecular formula】C5H9NO3S
【Molecular weight】163.20
【Appearance】White crystals or crystalline powder with a garlic-like odor and sour taste.
【Solubility】easily soluble in water or ethanol, insoluble in chloroform. Acidic in aqueous solution (pH2-2.75 in 10g/L H2O), mp 101-107℃
| Item of Test | Limits of Test | Results of Test |
| Appearance | White crystalline or crystalline powder | White crystalline or crystalline powder |
| Assay(HPLC) | >99% | 90.66% |
| Sieve analysis | 100% pass 80 mesh | Conforms |
| Specific optical rotation | ‘+5.6 °- +8.9 ° | ’+5.5 °- +7.0 ° |
| State of solution (Transmittance) | --- | >= 98.0% clear and colorless |
| Chloride (Cl) | --- | 19.89-20.29% |
| Ammonium(NH4) | --- | =< 0. 002% |
| Heavy Metal | <10ppm | Conforms |
| As | <2ppm | Conforms |
| Yeast & Mold | <1000cfu/g | 95cfu/g |
| E. Coli | <100cfu/g | 33cfu/g |
| S. Aureus | Negative | Absent |
| Saimonella | Negative | Absent |
| Pesticides | Negative | Absent |
| Conclusion | Conform with specification | |
| Storage | Store in 2-8℃, cool & dry place, Keep away from strong light and heat. | |