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Cystine is the oxidized dimer form of the amino acid cysteine and has the formula (SCH₂CH(NH₂)CO₂H)₂. It is a white solid that is slightly soluble in water. It serves two biological functions: a site of redox reactions and a mechanical linkage that allows proteins to retain their three-dimensional structure. It’s the main raw material of l-cysteine Hydrochloride.

Product: L-Cystine

CAS NO.: 56-89-3

 

  • Chemical formula: C₆H₁₂N₂O₄S₂
  • Average Molar mass: 240.30 g/mol
  • Melting point: 476.60°F (247°C)

Quality standard: AJI92, EP6, USP34, industrial grade

Product Name: (-)-Cystine Other Name: L-Cystine;Cystine,L-;Bis(β-amino-β-carboxyethyl) disulfide;Cystine acid;β,β′-Diamino-β,β′-dicarboxydiethyl disulfide;Dicysteine;3,3′-Dithiobis(2-aminopropanoic acid);β,β′-Dithiodialanine;Cystine;L-Cysteine disulfide;Propanoic acid,3,3′-dithiobis[2-amino-,[R-(R*,R*)]-;(-)-Cystine;L-Cystin;L-(-)-Cystine;Oxidized L-cysteine;[R-(R*,R*)]-3,3′-Dithiobis[2-aminopropanoic acid];l-Cystine;L-Alanine,3,3′-dithiobis-;NSC 13203;24645-67-8;154605-69-3
CAS No.: 56-89-3 Molecular Formula: C6H12N2O4S2
InChIKeys: InChIKey=LEVWYRKDKASIDU-IMJSIDKUSA-N Molecular Weight: 240.30000
Exact Mass: 240.30 EC Number: 206-486-2
UNII: 48TCX9A1VT DSSTox ID: DTXSID2046418
NCI Thesaurus Code: C29610 HScode: 2930901000
Categories: Amino Acids and Derivatives

PSA: 177.24000 XLogP3: -6.3
Appearance: DryPowder Density: 3″>1.677 g/cm3
Melting Point: 260.5 °C (decomp) Boiling Point: 468.2ºC at 760 mmHg
Flash Point: 237ºC Refractive Index: 1.653
Water Solubility: H2O: 0.112 g/L (25 ºC);1 M HCl: 100 mg/mL Storage Conditions: Store at RT.
PKA: 1None Dissociation Constants: 1
Collision Cross Section: 149.4 Ų [M+H]+ [CCS Type: DT, Method: single field calibrated with Agilent tune mix (Agilent)]|145 Ų [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine]|149.4 Ų [M+H]+ [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|151.2 Ų [M+Na]+ [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|143 Ų [M-H]- [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|147.3 Ų [M+Na-2H]- [CCS Type: DT, Method: single field calibrated with ESI Low Concentration Tuning Mix (Agilent)]|148.1 Ų [M+H]+ [CCS Type: TW, Method: calibrated with polyalanine and drug standards]|144.39 Ų [M-H]- [CCS Type: DT, Method: stepped-field]|150.08 Ų [M+H]+ [CCS Type: DT, Method: stepped-field]|151.81 Ų [M+Na]+ [CCS Type: DT, Method: stepped-field]|147.3 Ų [M-2H+Na]-

Classification of the substance or mixture

Not classified.

GHS label elements, including precautionary statements

Pictogram(s) No symbol.
Signal word

No signal word

Hazard statement(s)

none

Precautionary statement(s)
Prevention

none

Response

none

Storage

none

Disposal

none

Other hazards which do not result in classification

no data available

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.