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L-Cystine Suppliers list
Company Name: Henan DaKen Chemical CO.,LTD.
Tel: +86-371-66670886
Products Intro: Product Name:L-Cystine
Purity:99% Package:100g,500g,1KG,10KG,100KG
Company Name: Henan Tianfu Chemical Co.,Ltd.
Tel: 0371-55170693
Products Intro: Product Name:56-89-3
Purity:0.99 Package:25KG,5KG;1KG;500G
Tel: +86 21 5161 9050/ 5187 7795
Products Intro: Product Name:(Cys-OH)2
Purity:98% HPLC Package:5G;10G;25G;50G;100G;250G;1KG
Company Name: Hefei TNJ Chemical Industry Co.,Ltd.
Tel: 86-0551-65418684 18949823763
Products Intro: Product Name:L-Cystine
Purity:USP BP EP FCC JP Package:1KG;5USD
Company Name: Shanxi Naipu Import and Export Co.,Ltd
Products Intro: Product Name:L-Cystine
Purity:99% Package:1KG;10USD

Lastest Price from L-Cystine manufacturers

  • L-Cystine
  • US $1.00-499.00 / KG
  • 2021-10-21
  • CAS:56-89-3
  • Min. Order: 0.5KG
  • Purity: >99%
  • Supply Ability: 20tons
  • L-Cystine
  • US $15.00 / KG
  • 2021-10-20
  • CAS:56-89-3
  • Min. Order: 1KG
  • Purity: 99%
  • Supply Ability: 9000kg/per week
  • L-Cystine56-89-3
  • US $10.00 / KG
  • 2021-10-09
  • CAS:56-89-3
  • Min. Order: 1KG
  • Purity: 99%
  • Supply Ability: 20 tons
L-Cystine Basic information
Description References
Product Name:L-Cystine
Synonyms:(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-
Product Categories:Amino Acids;Cysteine [Cys, C];Food and Feed Additive;Amino Acids;Nutritional Supplements;L-Amino Acids;Amino Acid Derivatives;amino
Mol File:56-89-3.mol
L-Cystine Structure
L-Cystine Chemical Properties
Melting point >240 °C (dec.) (lit.)
Boiling point 468.2±45.0 °C(Predicted)
alpha -224 º(c=2 in 1M HCl)
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
pka1.0, 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.
CAS DataBase Reference56-89-3(CAS DataBase Reference)
NIST Chemistry ReferenceL-Cystine(56-89-3)
EPA Substance Registry SystemL-Cystine (56-89-3)
Safety Information
Hazard Codes Xi,Xn
Risk Statements 36/37/38-22
Safety Statements 26-36-24/25
WGK Germany 3
RTECS HA2690000
Hazard Note Irritant
PackingGroup III
HS Code 29309014
MSDS Information
2-Amino-3-[(2-amino-2-carboxyethyl)dithio]propanoic acid English
SigmaAldrich English
ACROS English
ALFA English
L-Cystine Usage And Synthesis
DescriptionL-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.
Chemical PropertiesA white or almost white, crystalline powder, practically insoluble in water and in alcohol.
UsesL-Cystine is a non-essential amino acid for human development. L-Cystine is formed by the dimerization of two cysteines through the sulfur.
Safety ProfileLow toxicity by ingestion. When heated to decomposition it emits toxic fumes of PO, and SOx
Purification MethodsCystine 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.]
Tag:L-Cystine(56-89-3) Related Product Information
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