Cystin
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- CAS-Nr.
- 56-89-3
- Bezeichnung:
- Cystin
- Englisch Name:
- L-Cystine
- Synonyma:
- (H-CYS-OH)2;(CYS)2;l-cystin;-Cystine;1-cystine;Cystine CRS;Cystine acid;L-(-)-CYSTINE;L-CYSTINE BASE;(r-(r*,r*))-3,3’-dithiobis(2-aminopropanoicacid)
- CBNumber:
- CB6394079
- Summenformel:
- C6H12N2O4S2
- Molgewicht:
- 240.3
- MOL-Datei:
- 56-89-3.mol
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Cystin Eigenschaften
- Schmelzpunkt:
- >240 °C (dec.) (lit.)
- Siedepunkt:
- 468.2±45.0 °C(Predicted)
- alpha
- -224 º(c=2 in 1M HCl)
- Dichte
- 1.68
- Brechungsindex
- -222.5 ° (C=1, 1mol/L HCl)
- storage temp.
- 2-8°C
- Löslichkeit
- 1 M HCl: 100 mg/mL
- Aggregatzustand
- Powder/Solid
- pka
- 1.0, 2.1, 8.02, 8.71(at 25℃)
- Farbe
- White
- Optische Aktivität
- [α]20/D 219±5°, c = 1% in 1 M HCl
- Wasserlöslichkeit
- 0.112 g/L (25 ºC)
- Merck
- 14,2782
- BRN
- 1728094
- Stabilität:
- Stable. Incompatible with strong oxidizing agents.
- InChIKey
- LEVWYRKDKASIDU-IMJSIDKUSA-N
- LogP
- 0.773 (est)
- CAS Datenbank
- 56-89-3(CAS DataBase Reference)
- NIST chemische Informationen
- L-Cystine(56-89-3)
- EPA chemische Informationen
- L-Cystine (56-89-3)
Cystin Chemische Eigenschaften,Einsatz,Produktion Methoden
R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S24/25:Berührung mit den Augen und der Haut vermeiden.
Chemische Eigenschaften
A white or almost white, crystalline powder, practically insoluble in water and in alcohol.
Verwenden
L-Cystine is a non-essential amino acid for human development. L-Cystine is formed by the dimerization of two cysteines through the sulfur.
Allgemeine Beschreibung
This 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
Sicherheitsprofil
Low toxicity by
ingestion. When heated to decomposition it
emits toxic fumes of PO, and SOx
läuterung methode
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.]
Cystin Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
Cystin Anbieter Lieferant Produzent Hersteller Vertrieb Händler.
Global( 954)Lieferanten
56-89-3(Cystin)Verwandte Suche:
- 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
- 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
- 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-Dicystiene
- BETA,BETA'-DITHIOBIS-A-AMINOPROPIONIC ACID
- CYSTINE, L-
- H-L-CYSTINE
- L(-)-3,3'-DITHIOBIS(2-AMINOPROPANOIC ACID)
- 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
- L-Cystine, extra pure, FCC
- L-α-DiaMino-β-dithiolacetic acid
- L-β,β′-DiaMino-β,β′-dicarboxydiethyl disulfide
- L-β,β′-Dithiodialanine
- L-Dicysteine
- Cystine (200 mg)
- [R-(R*,R*)]-3,3'-Dithiobis
[2-aMinopro
- Bis(β-aMino-β-carboxyethyl) Disulfide
- Cystine Αcid
- NSC 13203
- L-CYTISINE
- 3,3'-DITHIOBIS(2-AMINOPROPIONIC ACID)
- 2-AMINO-3-[(2-AMINO-2-CARBOXYETHYL)DITHIO]PROPANOIC ACID
