779539

L-Cystine

produced by Wacker Chemie AG, Burghausen, Germany, ≥98.5%

• Synonym(s): (R,R)-3,3′-Dithiobis(2-aminopropionicacid)
• Linear Formula: [-SCH₂CH(NH₂)CO₂H]₂
• CAS Number: 56-89-3
• Molecular Weight: 240.30
• Beilstein: 1728094
• EC Number: 200-296-3
• MDL number: MFCD00064228
• UNSPSC Code: 12352209
• PubChem Substance ID: 329768048
• NACRES: NA.22

Properties

• grade: produced by Wacker Chemie AG, Burghausen, Germany
• Assay: ≥98.5%
• form: powder
• optical activity: [α]/D -224 to -218°
• reaction suitability: reaction type: solution phase peptide synthesis
• impurities: ≤0.02% ammonium; ≤0.2% ninhidrin positive substances (each); ≤10 ppm heavy metals
• ign. residue: ≤0.1%
• loss: ≤0.2% loss on drying
• mp: >240 °C (dec.) (lit.)
• anion traces: chloride (Cl^-): ≤200 ppm; sulfate (SO₄^2-): ≤300 ppm
• cation traces: As: ≤1 ppm; Fe: ≤10 ppm; Pb: ≤5 ppm
• suitability: clear, colorless for appearance of solution
• 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

Description

General description

L-Cystine is an amino acid mainly found in the keratin of hair.

This product is supplied from Wacker FERMOPURE^® material, but is sold for R&D use only, not for drug, household or other uses.

Application

L-Cystine can be used as a starting material for the synthesis of d-biotin, aromatic-bridged cystine cyclic peptides (cystinophanes), chiral imidazolidine disulfides and biodegradable PEGylated gadolinium-diethylenetriamine pentaacetic acid (Gd-DTPA) L-cystine copolymers.

Legal Information

FERMOPURE is a registered trademark of Wacker Chemie AG

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable