Description References
ChemicalBook > CAS DataBase List > L-Cystine

L-Cystine

Description References
L-Cystine Structure
L-Cystine
  • CAS No.56-89-3
  • Chemical Name:L-Cystine
  • CBNumber:CB6394079
  • Molecular Formula:C6H12N2O4S2
  • Formula Weight:240.3
  • MOL File:56-89-3.mol
L-Cystine Property
  • Melting point: :>240 °C (dec.) (lit.)
  • alpha  :-224 º(c=2 in 1M HCl)
  • Boiling point: :468.2±45.0 °C(Predicted)
  • Density  :1.68
  • refractive index  :-222.5 ° (C=1, 1mol/L HCl)
  • storage temp.  :2-8°C
  • solubility  :1 M HCl: 100 mg/mL
  • form  :Powder/Solid
  • pka :1.0, 2.1, 8.02, 8.71(at 25℃)
  • color  :White
  • optical activity :[α]20/D 219±5°, c = 1% in 1 M HCl
  • Water Solubility  :0.112 g/L (25 ºC)
  • Merck  :14,2782
  • BRN  :1728094
  • Stability: :Stable. Incompatible with strong oxidizing agents.
  • InChIKey :LEVWYRKDKASIDU-IMJSIDKUSA-N
  • Substances Added to Food (formerly EAFUS) :L-CYSTINE
  • FDA 21 CFR :172.320
  • CAS DataBase Reference :56-89-3(CAS DataBase Reference)
  • NIST Chemistry Reference :L-Cystine(56-89-3)
  • EPA Substance Registry System :L-Cystine (56-89-3)
Safety
  • Hazard Codes  :Xi,Xn
  • Risk Statements  :36/37/38-22
  • Safety Statements  :26-36-24/25
  • RIDADR  :2811
  • WGK Germany  :3
  • RTECS  :HA2690000
  • Hazard Note  :Irritant
  • TSCA  :Yes
  • PackingGroup  :III
  • HS Code  :29309014
  • NFPA 704:
    1
    2 0
Hazard and Precautionary Statements (GHS)
  • Symbol(GHS)
  • Signal word
  • Hazard statements
  • Precautionary statements
L-Cystine Price More Price(47)
  • Brand: Sigma-Aldrich
  • Product number: 30200
  • Product name : L-Cystine
  • Purity: ≥99.7% (TLC)
  • Packaging: 25g
  • Price: $34.8
  • Updated: 2021/03/22
  • Buy: Buy
  • Brand: Sigma-Aldrich
  • Product number: 1.02836
  • Product name : L-Cystine
  • Purity: suitable for biopharmaceutical production FCC
  • Packaging: 1 kg
  • Price: $280
  • Updated: 2021/03/22
  • Buy: Buy
  • Brand: Sigma-Aldrich
  • Product number: SAB1305544
  • Product name : MONOCLONAL ANTI-NEPHRIN antibody produced in mouse
  • Purity: clone 174CT2.1.1, crude ascites, buffered aqueous solution
  • Packaging: 100 μL
  • Price: $377
  • Updated: 2021/03/22
  • Buy: Buy
  • Brand: Sigma-Aldrich
  • Product number: SAB1306092
  • Product name : ANTI-NEPHRIN (Y1210) antibody produced in rabbit
  • Purity: affinity isolated antibody, buffered aqueous solution
  • Packaging: 40TST
  • Price: $385
  • Updated: 2021/03/22
  • Buy: Buy
  • Brand: Sigma-Aldrich
  • Product number: SAB1305596
  • Product name : ANTI-PHOSPHO-NEPHRIN(Y1193)) antibody produced in rabbit
  • Purity: affinity isolated antibody, buffered aqueous solution
  • Packaging: 400UL
  • Price: $389
  • Updated: 2021/03/22
  • Buy: Buy

L-Cystine Chemical Properties,Usage,Production

  • Description L-cystine (formula: (SCH2CH(NH2) CO2H)2), the L-form of cystine) is a covalently linked dimeric nonessential amino acid formed through the oxidation of cysteine. It is contained in many foods including eggs, meat, dairy products, and whole grains as well as in skin and hairs. L-cystine and L-methionine are the amino-acids required for wound healing and formation of epithelial tissue. It is able to stimulate the hematopoietic system and promote the formation of white and red blood cells. It can also be used as a component of parental and enteral nutrition. It can also be used for the treatment of dermatitis and protection of liver function. L-cystine is manufactured through the enzymatic conversion from DL-amino thiazoline carboxylic acid.
  • References http://www.ajiaminoscience.com/products/manufactured_products/l-amino_acids/L-Cystine.aspx
    https://pubchem.ncbi.nlm.nih.gov/compound/L-cystine#section=Pharmacology
    https://en.wikipedia.org/wiki/Cystine
  • Chemical Properties A white or almost white, crystalline powder, practically insoluble in water and in alcohol.
  • Uses L-Cystine is a non-essential amino acid for human development. L-Cystine is formed by the dimerization of two cysteines through the sulfur.
  • Safety Profile Low toxicity by ingestion. When heated to decomposition it emits toxic fumes of PO, and SOx
  • Purification Methods Cystine disulfoxide impurity is removed by treating an aqueous suspension with H2S. The cystine is filtered off, washed with distilled water and dried at 100o under a vacuum over P2O5. Crystallise it by dissolving in 1.5M HCl, then adjusting to neutral pH with ammonia. Likely impurities are D-cystine, meso-cystine and tyrosine. Also purify it by dissolving it in 10% NH3 and adding gradually dilute AcOH until the point of precipitation and cooling slowly [Dughton & Harrison Acta Cryst 12 396, 402 1959.] Alternatively dissolve it in 6N NH4OH and evaporate it at room temperature for crystallisation to occur. [Chaney & Steinrauf Acta Cryst 30 711 1974, Beilstein 4 IV 3155.]
L-Cystine Preparation Products And Raw materials
Raw materials
Preparation Products
Global(608)Suppliers
  • Supplier:
    Henan Tianfu Chemical Co.,Ltd.
  • Tel:0371-55170693
  • Fax:0371-55170693
  • Email:info@tianfuchem.com
  • Country:CHINA
  • ProdList:22607
  • Advantage:55
  • Supplier:
    ATK CHEMICAL COMPANY LIMITED
  • Tel:+86 21 5161 9050/ 5187 7795
  • Fax:+86 21 5161 9052/ 5187 7796
  • Email:ivan@atkchemical.com
  • Country:CHINA
  • ProdList:26734
  • Advantage:60
  • Supplier:
    career henan chemical co
  • Tel:+86-371-86658258
  • Fax:
  • Email:sales@coreychem.com
  • Country:CHINA
  • ProdList:29961
  • Advantage:58
  • Supplier:
    Accela ChemBio Inc.
  • Tel:(+1)-858-699-3322
  • Fax:(+1)-858-876-1948
  • Email:info@accelachem.com
  • Country:United States
  • ProdList:19969
  • Advantage:58
56-89-3, L-CystineRelated Search:
  • (r-(r*,r*))-3,3’-dithiobis(2-aminopropanoicacid)
  • 1-cystine
  • 3,3’-dithiobis(2-amino-,(r-(r*,r*))-propanoicaci
  • 3,3’-dithiobis(2-aminopropanoicacid)
  • 3,3’-dithiobis-l-alanin
  • 3,3'-Dithiobis(2-aminopropanoic acid)
  • 3,3'-Dithiodialanine
  • Alanine, 3,3'-dithiobis-
  • Alanine, 3,3'-dithiodi-
  • alpha-Diamino-beta-dithiolactic acid
  • beta,beta’-diamino-beta,beta’-dicarboxydiethyldisulfide
  • Carbocysteine Impurity 3
  • L-Cystine in stock GMP Factory
  • Acetylcysteine Impurity 1(Acetylcysteine EP Impurity A)
  • Acetylcysteine Impurity A
  • beta,beta’-dithiodialanine
  • beta,beta'-Diamino-beta,beta'-dicarboxydiethyl disulfide
  • beta,beta'-Dithiobisalanine
  • beta,beta'-Dithiodialanine
  • Bis(beta-amino-beta-carboxyethyl) disulfide
  • bis(beta-amino-beta-carboxyethyl)disulfide
  • Cysteine disulfide
  • cysteinedisulfide
  • Cystin
  • Cystine acid
  • cystineacid
  • Dicysteine
  • Gelucystine (L form)
  • L-3,3’-Dithiodialanine
  • Nephrin
  • Oxidized L-cysteine
  • oxidizedl-cysteine
  • Propanoic acid, 3,3'-dithiobis(2-amino-, (R-(R*,R*))-
  • (R)-(-)-CYSTINE
  • (R,R)-(-)-CYSTINE
  • (R,R)-3,3'-DITHIOBIS(2-AMINOPROPIONIC ACID)
  • l-cysteinedisulfide
  • l-cystin
  • L-Dicystiene
  • BETA,BETA'-DITHIOBIS-A-AMINOPROPIONIC ACID
  • CYSTINE, L-
  • (CYS)2
  • (H-CYS-OH)2
  • H-L-CYSTINE
  • L(-)-3,3'-DITHIOBIS(2-AMINOPROPANOIC ACID)
  • L-(-)-CYSTINE
  • L-CYSTINE
  • L-CYSTINE extrapure
  • gelucystine
  • L-3, 31-dithiobis (2-aminopropanoic acid)
  • L-Cystinic acid
  • L-β,β'-Dithiobis(2-amino-pro-panoic acid)
  • L-Cystine, Metal binding, protein structure, antioxidant
  • (2R)-2-Amino-3-[(2R)-2-amino-3-hydroxy-3-oxopropyl]disulfanylpropanoic acid
  • L-(-)-3,3'-Dithiobis (2-aminopropionic acid)
  • 3,3'-Dithiobis(L-alanine)
  • (2S,7S)-(-)-Cystine
  • L-CYSTINERESEARCH GRADE