L-Cysteine hydrochloride

About This Item
Linear Formula:
HSCH2CH(NH2)COOH · HCl
CAS Number:
52-89-1
Molecular Weight:
157.62

Quality Segment: 200
Assay: ≥99.0% (RT)
Form: Powder or crystals
Optical Activity: [α]20/D +6.4±0.3°, c = 5% in 5 M HCl
Impurities: ≤0.5% foreign amino acids
Ignition Residue: ≤0.1% (as SO4)
Loss: ≤1.0% loss on drying
Color: White
Melting Point: 174.1-174.7 °C
Solubility: H2O: 1 g/10 mL, clear, colorless
Anion Traces: sulfate (SO42-): ≤100 mg/kg
Cation Traces: Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤50 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, NH4+: ≤500 mg/kg, Na: ≤50 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg
Applications: Peptide synthesis

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