1.02838

L-Cysteine

for biochemistry

• Sinónimos: L-Cysteine, α-Amino-ß-mercapto propionic acid, αlpha-Amino-ß-mercapto propionic acid, Cys, αlpha-Amino-beta-mercapto propionic acid
• Fórmula empírica (notación de Hill): C₃H₇NO₂S
• Número de CAS: 52-90-4
• Peso molecular: 121.16
• MDL number: MFCD00064306
• UNSPSC Code: 12352209
• EC Index Number: 200-158-2
• NACRES: NA.21

Propiedades

• Quality Level: 100
• 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
• solubility: 280 g/L
• bulk density: 300 kg/m³
• storage temp.: 2-30°C
• InChI: 1S/C3H7NO2S/c4-2(1-7)3(5)6/h2,7H,1,4H2,(H,5,6)
• InChI key: XUJNEKJLAYXESH-UHFFFAOYSA-N

Descripción

Application

• Exploring the molecular mechanisms of Lrp/AsnC-type transcription regulator DecR, an L-cysteine-responsive feast/famine regulatory protein.: This study delves into the role of DecR, an L-cysteine-responsive regulatory protein, in modulating bacterial response to nutrient availability, offering insights into microbial metabolism and potential targets for antibacterial strategies (Zhou et al., 2024).

Analysis Note

Assay (perchloric acid titration, calculated on dried substance): ≥ 99.0
Identity (IR-spectrum): passes test
Appearance: colorless to white, needle-shaped crystals
Appearance of solution (100 g/l, hydrochloric acid  2 mol/l): clear and colorless
Spec. rotation (α 20/D, 80 g/l, hydrochloric acid 1 mol/l, calc.on dried substance): +8.3 to +9.5
pH (25 g/l; CO₂-free water): 4.5 - 5.5
Chloride (Cl): ≤ 0.04 %
Sulfate (SO₄): ≤ 0.03 %
Heavy metals (as Pb): ≤ 0.001 %
As (Arsenic): ≤ 0.0001 %
Ca (Calcium): ≤ 0.001 %
Co (Cobalt): ≤ 0.0005 %
Fe (Iron): ≤ 0.0010 %
K (Potassium): ≤ 0.0005 %
Mg (Magnesium): ≤ 0.0005 %
Na (Sodium): ≤ 0.01 %
NH₄ (Ammonium): ≤ 0.02 %
Zn (Zinc): ≤ 0.0005 %
Foreign amino acids: ≤ 0.5 %
Other ninhydrine positive substances: ≤ 0.1 %
Loss on drying (105 °C; 3 h): ≤ 0.5 %

Información de seguridad

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