Description
L-CYSTEINE HYDROCHLORIDE MONOHYDRATE 98.5% For Biochemistry
Confirms to USP (Stereospecific,irreversible inhibitor of histidene,ammonia-lyase.)
Confirms to USP (Stereospecific,irreversible inhibitor of histidene,ammonia-lyase.)
| Article No. | 03141 | Grade | For Biochemistry |
| Purity | 98.5% | CAS No. | 7048-04-6 |
| Molecular Formula | C3H8ClNO2S.H2O | Molecular Weight | 175.64 |
| H.S. Code | 2930.9040 | Shelf Life | 60 Months |
Physical Properties
| Physical state at 20 °C | Solid | Colour | Colorless crstals | ||||
| pH value | 1 – 2 | Melting point/ Freezing point [°C] | 176°C | ||||
| Solubility in water [% weight] | 100 g/l at 25 °C | ||||||
Specifications
| Appearance | White crystals or crystalline powder; soluble in water,in alcohol and in acetone | Solubility | Soluble in water, in alcohol and in acetone |
| Identification (by IR) | Passes USP test | Assay (on dried basis) | 98.5% – 101.5% |
| Residue on ignition | NMT 0.4% | Chloride and sulfate (Sulfate) | NMT 0.03% |
| Iron (Fe) | NMT 30 ppm | Related Substances ( by TLC) | – |
| Individual impurities | Max. 0.5% | Total impurities | Max. 2.0% |
| Specific optical rotation (at 589 nm) (c=8, 6 N HCl) on dried substance | +5.7° to +6.8° | Loss on Drying for (For 24 h in a vacuum desiccator using a suitable desiccant and maintaining a pressure of NMT 5 mm of mercury Hg) |