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Cystine represents the oxidized dimer variant of the amino acid cysteine, bearing the chemical formula (SCH₂CH(NH₂)CO₂H)₂. It manifests as a white solid with slight solubility in water. Cystine fulfills two pivotal biological roles: acting as a locus for redox reactions and providing a mechanical linkage that aids proteins in maintaining their three-dimensional conformation. Furthermore, it serves as the primary raw material for the synthesis of l-cysteine hydrochloride. As a crucial constituent of keratin, it finds extensive application in formulations pertaining to hair, skin, and nails.

Product: L-Cystine

CAS NO.: 56-89-3

Quality standard: AJI92, EP6, USP34, industrial grade

Chemical formula: C₆H₁₂N₂O₄S

Average Molar mass: 240.30 g/mol

Melting point: 476.60°F (247°C)

 

Main Functions

  • Constituent of keratin, support healthy hair, nail and skin
  • Antioxidant, help maintain cellular antioxidant defense
  • Detoxification support in human body
  • Promote wound healing

Applications
✅ Dietary supplements (hair & nail health capsules / tablets)
✅ Cosmetic raw materials (hair care, skincare products)
✅ Pharmaceutical raw material
✅ Food additive, nutrition fortifier

Package
25kg fiber drum, or customized packing.

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.