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L-Cystine

L-Cystine Suppliers list
Company Name: DONBOO AMINO ACID COMPANY
Tel: +8613063595538
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Products Intro: Product Name:L-Cystine
CAS:56-89-3
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Company Name: Henan Fengda Chemical Co., Ltd
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Email: info@fdachem.com
Products Intro: Product Name:L-Cystine
CAS:56-89-3
Purity:98% Package:1KG;5USD|1000KG;0.1USD
Company Name: Shandong Juchuang Chemical Co., LTD
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Products Intro: Product Name:L-Cystine
CAS:56-89-3
Purity:99.9 Package:10kg;35USD|100kg;20USD|1000kg;15USD
Company Name: Shanghai Daken Advanced Materials Co.,Ltd
Tel: +86-371-66670886
Email: info@dakenam.com
Products Intro: Product Name:L-Cystine
CAS:56-89-3
Purity:99% Package:100g ;1KG ;5KG 25KG
Company Name: Henan Tianfu Chemical Co.,Ltd.
Tel: +86-0371-55170693 +86-19937530512
Email: info@tianfuchem.com
Products Intro: Product Name:L-Cystine
CAS:56-89-3
Purity:99% Package:25KG;5KG;1KG

L-Cystine manufacturers

  • L-Cystine
  • L-Cystine pictures
  • $5.00 / 1KG
  • 2024-03-27
  • CAS:56-89-3
  • Min. Order: 1KG
  • Purity: 98%
  • Supply Ability: g-kg-tons, free sample is available
  • L-Cystine
  • L-Cystine pictures
  • $35.00/ kg
  • 2024-03-11
  • CAS:56-89-3
  • Min. Order: 500kg
  • Purity: 99.9
  • Supply Ability: 200tons
  • L-Cystine
  • L-Cystine pictures
  • $25.00 / 1kg
  • 2024-01-08
  • CAS:56-89-3
  • Min. Order: 1kg
  • Purity: 99.96%
  • Supply Ability: 500ton
L-Cystine Basic information
Description References
Product Name:L-Cystine
Synonyms: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;beta,beta’-dithiodialanine
CAS:56-89-3
MF:C6H12N2O4S2
MW:240.3
EINECS:200-296-3
Product Categories:Amino Acids;Cysteine [Cys, C];Nutritional Supplements;L-Amino Acids;Amino Acids;Food and Feed Additive;amino;Amino Acid Derivatives;bc0001;56-89-3
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.
InChIKeyLEVWYRKDKASIDU-IMJSIDKUSA-N
LogP0.773 (est)
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
RIDADR 2811
WGK Germany 3
RTECS HA2690000
Hazard Note Irritant
TSCA Yes
PackingGroup III
HS Code 29309014
MSDS Information
ProviderLanguage
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.
Referenceshttp://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 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.
UsesL-Cystine is used as an antioxidant, protecting tissues against radiation and pollution. It finds application in protein synthesis. It is required for utilization of vitamin B6 and is useful in healing burns and wounds. It is also is required by certain malignant cell lines in the culture medium as well as for the growth of certain micro-organisms. It is useful in the stimulation of hematopoietic system and promotes the formation of white and red blood cells. It is an active ingredient in medications used to treat dermatitis.
UsesL-Cystine has been used in in vitro cystine solubility assay to identify potential drugs that influence cystine solubility. It is also used as a supplement of phosphate-buffered saline to slice and wash periprosthetic tissues.
DefinitionChEBI: L-cystine is the L-enantiomer of the sulfur-containing amino acid cystine. It has a role as a flour treatment agent, a human metabolite, a Saccharomyces cerevisiae metabolite, a mouse metabolite and an EC 1.2.1.11 (aspartate-semialdehyde dehydrogenase) inhibitor. It is a cystine, a L-cysteine derivative and a non-proteinogenic L-alpha-amino acid. It is a conjugate acid of a L-cystine anion. It is an enantiomer of a D-cystine. It is a tautomer of a L-cystine zwitterion.
General DescriptionThis Standard Reference Material (SRM) is intended primarily for use in validating microchemical procedures for the determination of carbon, hydrogen, nitrogen, and sulfur in organic matter. SRM 143d is pure crystalline cystine supplied in a 2 g unit size. For more information, please refer to the SDS and COA.

SRM 143D_cert SRM 143D _SDS
Biochem/physiol ActionsCysteine is the source of disulfide linkages in proteins and has a role in sulfur transport. It undergoes rapid oxidation to form cystine at physiological pH. L-cystine is crucial for oxygen production and low density lipoprotein modification by arterial smooth muscle cells. It also has a role in the synthesis of glutathione.
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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