L-CYSTEINE 99% FOR BIOCHEMISTRY
(R)-2-Amino-3-mercaptopropionic acid
| Product Code | B-00923 | BRAND | Bio-Chem |
|---|---|---|---|
| Grade | For Biochemistry | CAS No | 52-90-4 |
| Molecular Formula | C3H7NO2S | Molecular Weight | 121.16 |
| H.S.Code | 2930.90400 | Shelf Life | 60 Months |
| Purity | 99 % |
Physical Properties
| Physical state at 20 °C | Solid | Colour | Colorless crystalline |
|---|---|---|---|
| Solubility in water [% weight] | Appreciable (> 10%) | Melting point/ Freezing point [°C] | 220 °C |
Packaging
Specification
| Appearance | Colorless crystalline powder |
| Assay | Min. 99.0% |
| Specific optical rotation ([?]20/D) | +8.0° to +9.0° |
| UV absorbance | Max. 0.5 |
| Loss on dryig (at 105°C; 4 hrs) | Max. 0.3% |
| Chloride (Cl) | Max. 0.002% |
| Sulphate (SO4) | Max. 0.01% |
| Heavy metal (as Pb) | Max. 0.001% |
| Ammonium (NH4) | Max. 0.01% |
| Foreign amino acids | Max. 0.5% |
| Other ninhydrin positive substances (as glycine) | Max. 0.1% |
Safety Information and Hazard Symbols
Symbol: GHS05 , GHS07
Signal Word: Warning
Hazardous Statement: H302