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LC1775 L-Cysteine for biochemistry Order number Packaging Quantity Price AC28775 Glass bottle 25 g 18.23 AC28775 Glass bottle 100 g 51.3 AC28775 Glass bottle 1 kg 378 AC28775 Glass bottle 10 kg Inquire Product information Synonyms a-Amino--mercapto propionic acid Hill Formula C3H7NO2S HS Code 2930 90 13 EC number 200-158-2 Molar mass 121.16g/mol CAS number 52-90-4 Chemical and physical data Ignition temperature 420C Solubility 160g/l (20C) Melting point 220-228C Molar mass 121.16g/mol Bulk density 300kg/m3 pH value 4.5-5.5 (100g/l, H2O, 20C) Safety information according to GHS Hazard Statement(s) H302: Harmful if swallowed. Signal Word Warning Hazard Pictogram(s) RTECS HA1600000 Storage class 10 - 13 Other liquids and solids WGK WGK 1 slightly water endangering Disposal 3Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C. Safety information R Phrase R 22Harmful if swallowed. श्रेणियाँ of danger harmful Hazard Symbol Harmful Toxicological data LD 50 oral LD50 rat 1890 mg/kg Specifications Assay(perchloric acid titration, calculated on dried substance) 99.0% Identity(IR-spectrum) passes test Appearance White, crystalline powder or colorless crystals. Appearance of solution(0.5mol/l, hydrochloric acid 1mol/l) Clear and colorless. Spec. rotation( 20/D, 50g/l, hydrochloric acid 1 mol/l, calc. on dried substance) +8.0 to +9.0 UV-Absorption(280nm, 0.5mol/l, 1cm, hydrochloric acid 1mol/l) 0.5 Chloride (Cl) 0.02% Sulfate (SO4) 0.01% Heavy metals(as Pb) 0.001% As (Arsenic) 0.0005% Ca (Calcium) 0.001% Co (Cobalt) 0.0005% Fe (Iron) 0.0005% K (Potassium) 0.0005% Mg (Magnesium) 0.0005% Na (Sodium) 0.01% NH4 (Ammonium) 0.01% Zn (Zinc) 0.0005% Foreign amino acids 0.5% Other ninhydrine positive substances 0.1% Loss on drying(105C; 3h) 0.3%