Description
(R)-2-Amino-3-mercaptopropionic acid
L-CYSTEINE 99% For Biochemistry
L-CYSTEINE 99% For Biochemistry
| Article No. | 03140 | Grade | For Biochemistry |
| Purity | 99% | CAS No. | 52-90-4 |
| Molecular Formula | C3H7NO2S | Molecular Weight | 121.16 |
| H.S. Code | 2930.9040 | Shelf Life | 60 Months |
Physical Properties
| Physical state at 20 °C | Solid | Colour | Colorless crystalline | ||||
| Melting point/ Freezing point [°C] | 220 °C | Solubility in water [% weight] | Appreciable (> 10%) | ||||
Specifications
| Appearance | Colorless crystalline powder | Assay | Min. 99% |
| Specific optical rotation ([α]20/D) | +8.0° to +9.0° | UV absorbance | Max. 0.5 |
| Loss on drying (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% |