8.16014

(R)-(+)-Cysteine

for synthesis

• Synonym(s): (R)-(+)-Cysteine, α-Amino-β-mercapto propionic acid, αlpha-Amino-β-mercapto propionic acid, Cys, αlpha-Amino-beta-mercapto propionic acid
• Empirical Formula (Hill Notation): C₃H₇NO₂S
• CAS Number: 52-90-4
• Molecular Weight: 121.16
• UNSPSC Code: 12352209
• EC Index Number: 200-158-2
• NACRES: NA.22
• MDL number: MFCD00064306

Properties

• Quality Segment: 200
• form: solid
• autoignition temp.: 420 °C
• potency: 1890 mg/kg LD₅₀, oral (Rat)
• pH: 4.5-5.5 (20 °C, 100 g/L in H₂O)
• mp: 220-228 °C
• bulk density: 300 kg/m³
• storage temp.: 2-30°C
• SMILES string: SCC([N+H3])C(=O)[O-]
• InChI: 1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)
• InChI key: XUJNEKJLAYXESH-UHFFFAOYSA-N

Description

General description

Cysteine is used as a building block in the synthesis of peptides due to its ability to form disulfide bonds. Additionally, it functions as a chiral auxiliary in asymmetric synthesis, facilitating the induction of chirality in the resulting products.

Analysis Note

Assay (HClO₄): ≥ 98.0 %
Spec. rotation [α²0/D (c=8 in HCl 1 mol/l): +8.0 - +9.5 °
Identity (IR): passes test

Safety Information

• Storage Class: 13 - Non Combustible Solids
• wgk: WGK 1