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| Quantity: | |
|---|---|
52-90-4
Futurechemical
52-90-4
| L-Cysteine Basic information | |
| Product Name: | L-Cysteine |
| CAS: | 52-90-4 |
| MF: | C3H7NO2S |
| MW: | 121.16 |
| EINECS: | 200-158-2 |
| Mol File: | 52-90-4.mol |
| L-Cysteine Chemical Properties | |
| Melting point | 240 °C (dec.) (lit.) |
| alpha | 8.75 º (c=12, 2N HCl) |
| Boiling point | 293.9±35.0 °C(Predicted) |
| bulk density | 300kg/m3 |
| density | 1.197 (estimate) |
| FEMA | 3263 | L-CYSTEINE |
| refractive index | 8.8 ° (C=8, 1mol/L HCl) |
| storage temp. | Store below +30°C. |
| solubility | H2O: 25 mg/mL |
| pka | 1.92(at 25℃) |
| form | Solid |
| color | White |
| PH | 4.5-5.5 (100g/l, H2O, 20℃) |
| Odor | sulfury |
| Odor Type | sulfurous |
| optical activity | Optical rotation: +8° to +9° (c = 5, 1 N HCl, 20°C). |
| biological source | non-animal source |
| Water Solubility | 280 g/L (25 ºC) |
| λmax | λ: 260 nm Amax: 1.5 |
| λ: 280 nm Amax: 0.2 | |
| Sensitive | Air Sensitive |
| Merck | 142,781 |
| JECFA Number | 1419 |
| BRN | 1721408 |
| Stability: | Stability Stable, but may be air sensitive. Incompatible with oxidizing agents, bases. |
| LogP | -2.49 |
| CAS DataBase Reference | 52-90-4(CAS DataBase Reference) |
| NIST Chemistry Reference | L-Cysteine(52-90-4) |
| EPA Substance Registry System | L-Cysteine (52-90-4) |
Item | Standard | Result |
Appearance | Colorless to light yellow clear liquid | Colorless liquid |
Assay | 99-101% | 99.34% |
PH | 4.5-5.5 | 4.8 |
Specific Rotation （α） D20 | +8.3°~ +9.5° | +8.8° |
Transmittance T430 | ≥98.0% | 98.8% |
Chloride(CI) | ≤0.1% | ＜0.1% |
Ammonium(NH4) | ≤0.02% | ＜0.02% |
Sulfate(SO4) | ≤0.02% | ＜0.02% |
Iron (Fe) | ≤10ppm | ＜10ppm |
Heavy Metals(Pb) | ≤10ppm | ＜10ppm |
Arsenic AB2O3 | ≤1ppm | ＜1ppm |
Loss on drying | ≤0.50% | 0.24% |
Residue on Ignition | ≤0.1% | 0.04% |
Conclusion | Qualified | |
| L-Cysteine Basic information | |
| Product Name: | L-Cysteine |
| CAS: | 52-90-4 |
| MF: | C3H7NO2S |
| MW: | 121.16 |
| EINECS: | 200-158-2 |
| Mol File: | 52-90-4.mol |
| L-Cysteine Chemical Properties | |
| Melting point | 240 °C (dec.) (lit.) |
| alpha | 8.75 º (c=12, 2N HCl) |
| Boiling point | 293.9±35.0 °C(Predicted) |
| bulk density | 300kg/m3 |
| density | 1.197 (estimate) |
| FEMA | 3263 | L-CYSTEINE |
| refractive index | 8.8 ° (C=8, 1mol/L HCl) |
| storage temp. | Store below +30°C. |
| solubility | H2O: 25 mg/mL |
| pka | 1.92(at 25℃) |
| form | Solid |
| color | White |
| PH | 4.5-5.5 (100g/l, H2O, 20℃) |
| Odor | sulfury |
| Odor Type | sulfurous |
| optical activity | Optical rotation: +8° to +9° (c = 5, 1 N HCl, 20°C). |
| biological source | non-animal source |
| Water Solubility | 280 g/L (25 ºC) |
| λmax | λ: 260 nm Amax: 1.5 |
| λ: 280 nm Amax: 0.2 | |
| Sensitive | Air Sensitive |
| Merck | 142,781 |
| JECFA Number | 1419 |
| BRN | 1721408 |
| Stability: | Stability Stable, but may be air sensitive. Incompatible with oxidizing agents, bases. |
| LogP | -2.49 |
| CAS DataBase Reference | 52-90-4(CAS DataBase Reference) |
| NIST Chemistry Reference | L-Cysteine(52-90-4) |
| EPA Substance Registry System | L-Cysteine (52-90-4) |
Item | Standard | Result |
Appearance | Colorless to light yellow clear liquid | Colorless liquid |
Assay | 99-101% | 99.34% |
PH | 4.5-5.5 | 4.8 |
Specific Rotation （α） D20 | +8.3°~ +9.5° | +8.8° |
Transmittance T430 | ≥98.0% | 98.8% |
Chloride(CI) | ≤0.1% | ＜0.1% |
Ammonium(NH4) | ≤0.02% | ＜0.02% |
Sulfate(SO4) | ≤0.02% | ＜0.02% |
Iron (Fe) | ≤10ppm | ＜10ppm |
Heavy Metals(Pb) | ≤10ppm | ＜10ppm |
Arsenic AB2O3 | ≤1ppm | ＜1ppm |
Loss on drying | ≤0.50% | 0.24% |
Residue on Ignition | ≤0.1% | 0.04% |
Conclusion | Qualified | |
