Información general |
Nombre del producto:L-cisteína |
CAS NO :52-90-3 |
Nº EINECS: 200-158-2 |
Fórmula molecular: C3H7NO2S |
Peso molecular: 121.16 |
Apariencia: twin monoclinic or orthogonal crystallization, melting point 178 ℃, (a) + 26.5 (mol/L HCL), imine tastes, in neutral or slightly alkaline solution easy oxidation by air into cystine, acidic environment is stable. |
Solubilidad:soluble en agua, etanol, not soluble in ethanol, propanol, ethyl acetate, stupid, carbon disulfide, carbon tetrachloride. |
USOS: used in the treatment of skin conditions such as eczema, urticaria, pecas, the series products are widely used in medicine, food and cosmetics industries. |
Estándar: AJI92 |
ANÁLISIS BÁSICO | ||
Elemento de análisis | Especificación | Resultados |
Ensayo | 98.0%~101.0% | 98.5% |
Organoléptico | ||
Apariencia | polvo blanco | conforme |
Olor | Característica | conforme |
Gusto | Característica | conforme |
Características físicas | ||
Rotación óptica específica[a]D 20+ | + 8.3°- +9.5° | +8.7° |
State of solution (Transmitancia) | ≥95,0% | 98.5% |
Pérdida por secado | ≤0.50% | 0.32% |
Residuos en ignición | ≤0.10% | 0.06% |
pH value | 4.5 ~ 5.5 | 4.8 |
Metales pesados | ||
Metales pesados(Pb) | ≤10PPM | 3ppm |
Cloruro (cl) | ≤0.04% | 0.030% |
Arsénico (As2O3) | ≤1PPM | 0.1ppm |
Hierro (Fe) | ≤10PPM | 4ppm |
Ammonium (NH4) | ≤0.02% | 0.010% |
Sulfato (SO4) | ≤0.020% | 0.010% |
Other amino acids | Chromatographically | Calificado |