化学名称: | S-羧甲基-L-半胱氨基 |
INCI名称: | 羧甲司坦 |
英文名称: | S-CARBOXYMETHYL-L-CYSTEINE |
CAS号: | 638-23-3 |
HS编码 | 2930909099 |
化学式: | C5H9NO4S |
分子量: | 179.19 |
中文别名: | 3-羧甲基硫代-L-丙氨酸; 羧甲基半胱氨酸; S-羧甲基-L-半胱氨酸; S-羟甲基-L-半胱氨酸; S-(羧甲基)-L-半胱氨酸; 3-[(羧甲基)硫代]丙氨酸 羧甲司坦 |
英文别名: | S-carboxymethyl-L-cysteine; Carbocistein; S-Carboxymethyl-L-cysteine CARBOCYSTEINE |
指 标 Specification | 标 准 Standard |
外观 Appearance | 白色或类白色结晶性粉末White or almost white crystalline powder |
溶液外观 Appearance of the Solution | 透明无色至浅黄色Transparent colorless to light yellow |
pH值 pH value | 2.8~3.0 |
比旋度 Specification Rotation | -32.5°~-36.0° |
干燥失重 Loss on Drying | ≤0.5% |
灼烧残渣 Residue on Ignition | ≤0.2% |
氯化物Chloride | ≤0.15% |
硫酸盐sulfate | ≤0.03% |
重金属(铅) Heavy metal(Lead) | ≤20 ppm |
铁盐 Ironic Salt | ≤10 ppm |
半胱氨酸 Cysteine | ≤0.05% |
透光率Light transmittance | ≥95.0%(430nm) |
含量 Assay(drying basis) | 98.5~101.0% |
微生物检测 Microbial Test | |
总菌数 Total Aerobic | ≤1000cfu/g |
霉菌和酵母 Yeast & Mold | ≤100cfu/g |
大肠杆菌 E.coli | Negative |
沙门氏菌 Salmonella | Negative |
Package: In 25Kg net per fiber drum, inner polythene bags. We can provide the packing as per your request. |