L(+)-Cystéine 98+%
Marques : Thermo Fisher ScientificTotal Evaluation: 0
Moyenne des Notes : 0.0 sur 5
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Attention
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Synonyme(s):
H-Cys-OH, (R)-(+)-Cystéine
Formule:
HSCH₂CH(NH₂)CO₂H Poids moléculaire: 121.16 g/mol Point d'ébullition: 254 Point de fusion: 220 °C (déc.) Température de stockage: Réfrigérateur |
Numéro MDL:
MFCD00064306 Numéro CAS: 52-90-4 EINECS: 200-158-2 Indice Merck: 13,02810 |
Résultats des tests de spécification
Appearance | White to almost white Powder or crystals |
Infrared spectrum | Conforms |
Loss on drying | ≤0.5 % (105°C, 3 hrs) |
Solubility | (2.5 % in water) Clear colorless |
Residue after ignition | ≤0.1 % |
pH | 4.5 to 5.5 (2.5 % in water) |
Specific optical rotation | +7.5° to +9.5° (20°C, 589 nm) (c=8, 5N HCl) |
Titration with HClO4 | 98.0 to 102.0 % |
Chloride (Cl) | ≤0.05 % |
Sulfate (SO4) | ≤0.03 % |
Ammonium (NH4) | ≤0.02 % |
Iron (Fe) | ≤10 ppm |
Heavy metals (as Pb) | ≤10 ppm |
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