2470

L-Cystine

• Synonym(s): L-Cystine, (Cys)₂
• Empirical Formula (Hill Notation): C₆H₁₂N₂O₄S₂
• CAS Number: 56-89-3
• Molecular Weight: 240.30
• MDL number: MFCD00064228
• UNSPSC Code: 12352209
• NACRES: NA.25

Properties

• assay: ≥98% (Macro-Kjeldahl method)
• Quality Level: 100
• form: crystalline powder; crystals
• optical activity: [α]20/D -218 to -224°, c = 2 in 1 M HCl
• manufacturer/tradename: Calbiochem^®
• storage condition: OK to freeze
• color: white
• anion traces: chloride (Cl^-): ≤0.02%; sulfate (SO₄^2-): ≤0.02%
• cation traces: As: ≤1 ppm; NH₄⁺: ≤0.02%; heavy metals: ≤10 ppm
• shipped in: ambient
• storage temp.: 15-25°C
• 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

Non-essential amino acid for human development. Has an optimal pH of 5.0-6.5.

Warning

Toxicity: Standard Handling (A)

Preparation Note

Solubility may be enhanced by lowering the pH to <2.0 or raising the pH to >8.0.

Legal Information

CALBIOCHEM is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable