L-Cystine, specified according to the requirements of Ph.Eur.

Description

CAS: 56-89-3 | C6H12N2O4S2 | 240.292 g/mol

This Thermo Scientific Chemicals brand product was originally part of the Acros Organics product portfolio. Some documentation and label information may refer to the legacy brand. The original Acros Organics product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Specifications

Chemical Identifiers

• CAS: 56-89-3
• Molecular Formula: C6H12N2O4S2
• Molecular Weight (g/mol): 240.292
• InChI Key: LEVWYRKDKASIDU-IMJSIDKUSA-N
• Synonym: l-cystine, cystine, l-dicysteine, l-cystin, cystine acid, cysteine disulfide, oxidized l-cysteine, beta,beta'-dithiodialanine, h-cys-oh 2, l-cysteine disulfide
• PubChem CID: 67678
• ChEBI: CHEBI:16283
• IUPAC Name: (2R)-2-amino-3-[[(2R)-2-amino-2-carboxyethyl]disulfanyl]propanoic acid
• SMILES: C(C(C(=O)O)N)SSCC(C(=O)O)N

• Melting Point: 260.0°C to 261.0°C
• Ammonium: 200ppm max.
• Heavy Metals (as Pb): 10ppm max.
• Infrared Spectrum: Authentic
• Iron (Fe): 10ppm max.
• Loss on Drying: 0.5% max. (1 g, 105°C)
• Linear Formula: [-SCH₂CH(NH₂)CO₂H]₂
• Specific Rotation: −224.00
• Sulfate: 300ppm max.
• Sulfated Ash: 0.1% max. (1 g)
• Solubility Information: Solubility in water: 0.112g/l(25°C), 24mg/100mL(50°C). Other solubilities: 52 mg/100mL water (75°C),114 mg/100mL water(100°C), soluble in aq. solutions <ph 2, soluble in mineral acids, alkalis, ammonium hydrox, ide,, insoluble in ethanol, diethyl ether, b
• Specific Rotation Condition: −224.00 (20.00°C c=2;1 M HCL dry.sub.)
• Quantity: 25 g
• Formula Weight: 240.3
• Chemical Name or Material: L-Cystine

Safety and Handling

SDS

RUO – Research Use Only