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L-Cysteine
产品价格查看更多规格...
| 产品编号 | 包装单位 | 单价(元) | 国内现货 | 国外库存 | 询价单 |
| 4058988 | 25 G | 871 | |||
| 4058988 | 100 G | 1138 | |||
| 4058988 | 1 KG | 4810 | |||
| 4058988 | 10 KG | 30160 |
产品别名
52-90-4
L-Cysteine
α-Amino-в-mercapto propionic acid, αlpha-Amino-в-mercapto propionic acid, Cys, αlpha-Amino-beta-mercapto propionic acid
基本信息
| Empirical Formula【经验(实验)分子式】 | C3H7NO2S |
| Molecular weight | 121.16 |
| MDL number | MFCD00064306 |
| EC Index Number【EC索引号】 | 200-158-2 |
| Analysis Note【分析说明】 | Assay (perchloric acid titration, calculated on dried substance): ≥ 99.0 Identity (IR-spectrum): passes test Appearance: colorless to white, needle-shaped crystals Appearance of solution (100 g/l, hydrochloric acid 2 mol/l): clear and colorless Spec. rotation (α 20/D, 80 g/l, hydrochloric acid 1 mol/l, calc.on dried substance): +8.3 to +9.5 pH (25 g/l; CO₂-free water): 4.5 - 5.5 Chloride (Cl): ≤ 0.04 % Sulfate (SO₄): ≤ 0.03 % Heavy metals (as Pb): ≤ 0.001 % As (Arsenic): ≤ 0.0001 % Ca (Calcium): ≤ 0.001 % Co (Cobalt): ≤ 0.0005 % Fe (Iron): ≤ 0.0010 % K (Potassium): ≤ 0.0005 % Mg (Magnesium): ≤ 0.0005 % Na (Sodium): ≤ 0.01 % NH₄ (Ammonium): ≤ 0.02 % Zn (Zinc): ≤ 0.0005 % Foreign amino acids: ≤ 0.5 % Other ninhydrine positive substances: ≤ 0.1 % Loss on drying (105 °C; 3 h): ≤ 0.5 % |
产品性质
| Quality Level【质量水平】 | 100 |
| form【形式】 | solid |
| autoignition temp.【自燃温度】 | 420 ℃ |
| potency【效能】 | 1890 mg/kg LD50, oral (Rat) |
| pH【pH值(酸碱度)】 | 4.5-5.5 (20 ℃, 100 g/L in H2O) |
| mp | 220-228 ℃ |
| solubility【溶解性】 | 280 g/L |
| bulk density【堆积密度】 | 300 kg/m3 |
| storage temp.【储存温度】 | 2-30℃ |
| InChI | 1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6) |
| InChI key | XUJNEKJLAYXESH-UHFFFAOYSA-N |
安全信息
| Storage Class Code【储存分类代码】 | 13 - Non Combustible Solids |
| WGK | WGK 1 |
