1.02839

L-システイン 塩酸塩 一水和物

for biochemistry

• 別名: Cys, L-Cysteinium Chloride Monohydrate, L-Cysteine Hydrochloride, Monohydrate
• 化学式: HSCH₂CH(NH₂)COOH · HCl · H₂O
• CAS番号: 7048-04-6
• 分子量: 175.63
• Beilstein: 5158059
• MDL番号: MFCD00065606
• UNSPSCコード: 12352209
• EC Index Number: 200-157-7
• NACRES: NA.21

特性

• 蒸気圧: <0.1 hPa ( 20 °C)
• 品質水準: 100
• アッセイ: 98.5-101.0% dry basis (alkalimetric)
• 形状: crystalline powder
• pH: 0.8-1.2 (20 °C, 100 g/L in H₂O)
• mp: 168-170 °C
• 溶解性: 650 g/L
• 密度: 1.54 g/cm³
• かさ密度: 780 kg/m³
• 微量陰イオン: sulfate (SO₄^2-): ≤300 ppm
• 微量陽イオン: Fe: ≤20 ppm; heavy metals (as Pb): ≤10 ppm
• 保管温度: 2-30°C
• SMILES記法: O.Cl.N[C@@H](CS)C(O)=O
• InChI: 1S/C3H7NO2S.ClH.H2O/c4-2(1-7)3(5)6;;/h2,7H,1,4H2,(H,5,6);1H;1H2/t2-;;/m0../s1
• InChI Key: QIJRTFXNRTXDIP-JIZZDEOASA-N

詳細

アプリケーション

• Smartphone-based Ellman′s colourimetric methods for the analysis of d-penicillamine formulation and thiolated polymer: Demonstrates the application of L-Cysteine hydrochloride monohydrate in developing colorimetric assays for pharmaceutical analysis, enhancing the accessibility and cost-effectiveness of drug quality control (Phadungcharoen et al., 2019).


• The effects of the thiolation with thioglycolic acid and l-cysteine on the mucoadhesion properties of the starch-graft-poly(acrylic acid): Focuses on the modification of polymers with L-Cysteine hydrochloride monohydrate to improve their mucoadhesive properties, which is critical for developing more effective drug delivery systems (Gök et al., 2017).


• On-line pre-reduction of pentavalent arsenicals by thioglycolic acid for speciation analysis by selective hydride generation-cryotrapping-atomic absorption spectrometry: Utilizes L-Cysteine hydrochloride monohydrate in analytical chemistry techniques to improve the detection and measurement of toxic elements in environmental samples, crucial for monitoring and ensuring public health (Musil et al., 2008).

生物化学的／生理学的作用

N-メチル-D-アスパラギン酸(NMDA)型グルタミン酸作動性受容体のアゴニストです。

アナリシスノート

Assay (alkalimetric, calculated on dried substance): 98.5 - 101.0 %
Identity (IR-spectrum): passes test
Identity (Chloride): passes test
Appearance: white or almost white, crystalline powder or colorless crystals
Appearance of solution (25 g/l, water): clear and not more intense in color than reference solution BY6
Spec. rotation (α 20/D, 80 g/l, hydrochloric acid 250 g/l, calc. on dried substance): +5.5 to +7.0
Spec. rotation (α 25/D, 80 g/l, hydrochloric acid 6 mol/l, calc. on dried substance): +5.7 to +6.8
Sulfate (SO₄): ≤ 300 ppm
Heavy metals (as Pb): ≤ 10 ppm
Fe (Iron): ≤ 20 ppm
Related Compounds, total (TLC): ≤ 0.5 %
Ninhydrin-positive substances (LC)(impurity A (570 nm)): ≤ 0.5 %
Ninhydrin-positive substances (LC)(any ninhydrin-positive impurity): ≤ 0.2 %
Ninhydrin-positive substances (LC) (ammonium (570 nm)): ≤ 0.02 %
Ninhydrin-positive substances (LC)(total impurities): ≤ 1.0 %
Residual solvents (ICH Q3C): excluded by manufacturing process
Sulfated ash (600 °C): ≤ 0.1 %
Loss on drying (Vacuum < 0.7 kPa, P₂O₅, 24 h): 8.0 - 12.0 %
Bacterial endotoxins: ≤ 6.0 I.U./g

安全性情報

• 保管分類コード: 11 - Combustible Solids
• WGK: WGK 1
• 引火点(°F): Not applicable
• 引火点(℃): Not applicable