Merck
All Photos(1)

30200

Sigma-Aldrich

L-Cystine

≥99.7% (TLC)

Synonym(s):
(R,R)-3,3′-Dithiobis(2-aminopropionicacid)
Linear Formula:
[-SCH2CH(NH2)CO2H]2
CAS Number:
Molecular Weight:
240.30
Beilstein:
1728094
Número de EC:
Número MDL:
eCl@ss:
32160406
ID de la sustancia en PubChem:
NACRES:
NA.26

Nivel de calidad

200

ensayo

≥99.7% (TLC)

formulario

powder or crystals

actividad óptica

[α]20/D −219±5°, c = 1% in 1 M HCl

residuo de ign.

≤0.1% (as SO4)

pérdida

≤0.1% loss on drying

color

white

mp

>240 °C (dec.) (lit.)

solubilidad

1 M HCl: 0.5 g/10 mL, clear, colorless

trazas de anión

chloride (Cl-): ≤500 mg/kg
sulfate (SO42-): ≤100 mg/kg

trazas de catión

Ca: ≤50 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤6 mg/kg
Fe: ≤10 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Na: ≤150 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

application(s)

peptide synthesis

SMILES string

N[C@@H](CSSC[C@H](N)C(O)=O)C(O)=O

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

InChI key

LEVWYRKDKASIDU-IMJSIDKUSA-N

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Aplicación

L-Cystine has been used to prepare stock solution which in turn is utilized for determining the L-cysteine and L-cystine in pharmaceutical preparations as well as in urine samples by using spectrofluorimetric flow injection method.

Acciones bioquímicas o fisiológicas

Cystine is required for the synthesis of glutathione that protects the cells from oxidative stress. A specific x(c)-cysteine/glutamate antiporter mediates cellular uptake of cysteine in exchange for glutamate. Inhibition of cysteine uptake induces toxicity in neuronal cells.

Otras notas

Preparation of N,N′-dibenzoyl-L-cystine, an efficient auxiliary for enantioselective reductions of ketones

Código de clase de almacenamiento

11 - Combustible Solids

WGK

WGK 1

Punto de inflamabilidad F

Not applicable

Punto de inflamabilidad C

Not applicable

Equipo de protección personal

Eyeshields, Gloves, type N95 (US)

Certificate of Analysis

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Certificate of Origin

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