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| CAS No.: | 56-89-3 |
|---|---|
| Name: | L-Cystine |
| Article Data: | 312 |
| Molecular Structure: | |
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| Formula: | C6H12N2O4S2 |
| Molecular Weight: | 240.304 |
| Synonyms: | 查看更多英文别名"> L-Cystine;1-cystine;L-CYSTINE;l-cystin;h-(cys);(H-Cys-OH)2;(R,R)-3,3'-Dithiobis(2-aminopropionicacid);Cystin;[3H]-Cystine;(CYS)2;.β.,.β.'-Diamino-.β.,.β.'-dicarboxydiethyl disulfide;(R,R)-cystine;Nephrin;Dicysteine;L-CYTISINE;查看更多英文别名 |
| EINECS: | 200-296-3 |
| Density: | 1.571 g/cm3 |
| Melting Point: | >240 °C (dec.)(lit.) |
| Boiling Point: | 468.2 °C at 760 mmHg |
| Flash Point: | 237 °C |
| Solubility: | 0.112 g/L (25 °C) in water |
| Appearance: | White crystalline powder |
| Hazard Symbols: |
 Xi
|
| Risk Codes: | 36/37/38 |
| Safety: | 26-36-24/25 |
| PSA: | 177.24000 |
| LogP: | 0.59220 |
| Conditions | Yield |
|---|---|
| With 3-bromo-2-(1-hydroxycyclohexyl)[1,2]selenazolo[2,3-a]pyridinium chloride; dihydrogen peroxide In methanol; water at 20℃; for 0.166667h; | 100% |
| With dihydrogen peroxide; sodium iodide In water at 25℃; for 1h; Cooling with ice; | 100% |
| With bis(4-methoxyphenyl)telluride; rose bengal In water; isopropyl alcohol at 0℃; for 0.833333h; Irradiation; | 99% |
L-Cysteine
(R)-2-Amino-3-(4-methoxy-phenylmethanesulfinyl)-propionic acid
L-cystine
| Conditions | Yield |
|---|---|
| With dimethylsulfide; trifluorormethanesulfonic acid In trifluoroacetic acid at 0℃; for 1h; | 100% |
(R)-9H-fluorenyl-9-methyl-L-cysteine
L-cystine
| Conditions | Yield |
|---|---|
| With piperidine In N,N-dimethyl-formamide for 2h; | 100% |
| Conditions | Yield |
|---|---|
| With copper(II) ion In water at 25℃; Rate constant; var. conc. of Cu2+; | A 100% B n/a |
| Conditions | Yield |
|---|---|
| With Methyltrichlorosilane; 1,1'-sulfinylbisbenzene at 4℃; for 0.166667h; | 99% |
| Conditions | Yield |
|---|---|
| With dimethylsulfide In trifluoroacetic acid at 0℃; for 1h; | 97.9% |
L-cystine
| Conditions | Yield |
|---|---|
| With sodium hydroxide In water at 20 - 60℃; for 2h; pH=~ 4.0; | 97% |
| With ammonia In water at 20 - 60℃; for 0.666667 - 2h; pH=~ 3.0; | 97% |
| With ammonia In water at 20 - 80℃; for 2h; pH=~ 2.3 - ~ 3.0; | 95% |
| Conditions | Yield |
|---|---|
| In methanol; aq. phosphate buffer at 20℃; pH=7.4; | A 95% B 96% C 80% |
| Conditions | Yield |
|---|---|
| With Methyltrichlorosilane; 1,1'-sulfinylbisbenzene at 4℃; for 0.166667h; | 95% |
| With methoxybenzene; thallium(III) trifluoroacetate In trifluoroacetic acid at 0℃; for 1h; | 86.7% |
| With methoxybenzene; thallium(III) trifluoroacetate In trifluoroacetic acid at 0℃; for 1h; Product distribution; cleavage various S-protecting groups of cystein; | 86.7% |
S-acetamidomethyl-L-cysteine
L-cystine
| Conditions | Yield |
|---|---|
| With Methyltrichlorosilane; 1,1'-sulfinylbisbenzene at 4℃; for 0.5h; | 93% |
| With Methyltrichlorosilane; 1,1'-sulfinylbisbenzene at 4℃; for 0.5h; Product distribution; other S-protected cysteines; | 93% |
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1. Introduction of L-Cystine
L-Cystine, with the IUPAC Name of (2R)-2-amino-3-[(2R)-2-amino-3-hydroxy-3-oxopropyl]disulfanylpropanoic acid, is one kind of white crystalline powder. Stability: For being stable in the normal condition, it is incompatible with strong oxidizing agents, and this chemical belongs to the Product Categories which include Food and Feed Additive; Amino Acids; Amino Acid Derivatives; Cysteine [Cys, C]; Nutritional Supplements; L-Amino Acids; Amino Acids.
2. Properties of L-Cystine
L-Cystine has the following property datas: (1)Melting Point: >240 °C (dec.)(lit.); (2)Surface Tension: 88.2 dyne/cm ; (3)Density: 1.571 g/cm3 ; (4)Flash Point: 237 °C ; (5)Enthalpy of Vaporization: 80.02 kJ/mol ; (6)Boiling Point: 468.2 °C at 760 mmHg ; (7)Vapour Pressure: 4.62E-10 mmHg at 25°C ; (8)Water Solubility: 0.112 g/L (25 °C).
3. Structure Descriptors of L-Cystine
You could convert the following datas into the molecular structure:
InChI: InChI=1S/C6H12N2O4S2/c7-3(5(9)10)1-13-14-2-4(8)6(11)12/h3-4H,1-2,7-8H2,(H,9,10)(H,11,12)/t3-,4-/m0/s1
InChIKey: InChIKey=LEVWYRKDKASIDU-IMJSIDKUSA-N
Smiles: C([C@@H](C(O)=O)N)SSC[C@@H](C(O)=O)N
4. Toxicity of L-Cystine
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| mouse | LD50 | intraperitoneal | > 961mg/kg (961mg/kg) | Yakugaku Zasshi. Journal of Pharmacy. Vol. 94, Pg. 1419, 1974. | |
| rat | LDLo | oral | 25gm/kg (25000mg/kg) | Oyo Yakuri. Pharmacometrics. Vol. 15, Pg. 199, 1978. |
5. Safety Information of L-Cystine
Hazard Codes: 
Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-24/25
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36:Wear suitable protective clothing.
S24/25:Avoid contact with skin and eyes.
RIDADR: 2811
WGK Germany: 3
RTECS: HA2690000
Hazard Note: Irritant
PackingGroup: III
HS Code: 29309014
6. Use of L-Cystine
Cystine (CAS NO.56-89-3) can be mainly used for various disease alopecia. Also it can be used for dysentery, typhoid, influenza and other acute infectious diseases, asthma, neuralgia, eczema and various diseases, such as poisoning, and protein structure to maintain the role. It is also used as a food flavoring agent.
