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L-Cystine

Description References
L-Cystine
L-Cystine structure
CAS No.
56-89-3
Chemical Name:
L-Cystine
Synonyms
NPHN;NPHS1;Cystin;(CYS)2;Nephrin;h-(cys);l-cystin;-Cystine;1-cystine;L-CYSTINE
CBNumber:
CB6394079
Molecular Formula:
C6H12N2O4S2
Formula Weight:
240.3
MOL File:
56-89-3.mol

L-Cystine Properties

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
  • Risk and Safety Statements
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

L-Cystine price More Price(47)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 30200 L-Cystine ≥99.7% (TLC) 56-89-3 25g $34.8 2021-03-22 Buy
Sigma-Aldrich 1.02836 L-Cystine suitable for biopharmaceutical production FCC 56-89-3 1 kg $280 2021-03-22 Buy
Sigma-Aldrich SAB1305544 MONOCLONAL ANTI-NEPHRIN antibody produced in mouse clone 174CT2.1.1, crude ascites, buffered aqueous solution 56-89-3 100 μL $377 2021-03-22 Buy
Sigma-Aldrich SAB1306092 ANTI-NEPHRIN (Y1210) antibody produced in rabbit affinity isolated antibody, buffered aqueous solution 56-89-3 40TST $385 2021-03-22 Buy
Sigma-Aldrich SAB1305596 ANTI-PHOSPHO-NEPHRIN(Y1193)) antibody produced in rabbit affinity isolated antibody, buffered aqueous solution 56-89-3 400UL $389 2021-03-22 Buy

L-Cystine Chemical Properties,Uses,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


L-Cystine Suppliers

Global( 608)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Henan DaKen Chemical CO.,LTD.
+86-371-66670886
info@dakenchem.com China 21075 58
Henan Tianfu Chemical Co.,Ltd.
0371-55170693
0371-55170693 info@tianfuchem.com CHINA 22607 55
ATK CHEMICAL COMPANY LIMITED
+86 21 5161 9050/ 5187 7795
+86 21 5161 9052/ 5187 7796 ivan@atkchemical.com CHINA 26725 60
Hefei TNJ Chemical Industry Co.,Ltd.
86-0551-65418684 18949823763
86-0551-65418684 info@tnjchem.com China 3001 55
Shanxi Naipu Import and Export Co.,Ltd
+8613734021967
kaia@neputrading.com CHINA 1010 58
Shanghai Zheyan Biotech Co., Ltd.
18017610038
zheyansh@163.com CHINA 3623 58
career henan chemical co
+86-371-86658258
sales@coreychem.com CHINA 29970 58
SHANDONG ZHI SHANG CHEMICAL CO.LTD
+86 18953170293
+86 0531-67809011 sales@sdzschem.com CHINA 2858 58
Hubei Jusheng Technology Co.,Ltd.
86-18871470254
027-59599243 linda@hubeijusheng.com CHINA 28229 58
Accela ChemBio Inc.
(+1)-858-699-3322
(+1)-858-876-1948 info@accelachem.com United States 19969 58

View Lastest Price from L-Cystine manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-09-14 L-Cystine
56-89-3
US $26.00 / KG 1KG 99% 10000kg Baoji Guokang Healthchem co.,ltd
2021-09-07 L-Cystine
56-89-3
US $10.00 / Kg/Bag 1Kg/Bag Above 99% 5000kg/month Hebei Zhanyao Biotechnology Co. Ltd
2021-09-02 L-Cystine
56-89-3
US $1.00-499.00 / KG 0.5KG >99% 20tons Anhui Rencheng Technology Co., Ltd

L-Cystine Spectrum


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