Sigma-Aldrich L-Cysteine Hydrochloride Monohydrate For

Name: Sigma-Aldrich L-Cysteine Hydrochloride Monohydrate For
SKU: SIAL-1028399010
Price: 4197.60 USD

List Price $4,197.60 Your Price $4,197.60

Sigma-Aldrich L-Cysteine Hydrochloride Monohydrate For - SIAL (Additional S&H or Hazmat Fees May Apply)

NETA PART: SIAL-1028399010

MFG.PART: 1028399010

UNSPSC: 12352209

Manufacturer: Sigma-Aldrich

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Description

vapor pressure

<0.1 hPa ( 20 °C)

Quality Level

100

assay

98.5-101.0% dry basis (alkalimetric)

form

crystalline powder

pH

0.8-1.2 (20 °C, 100 g/L in H₂O)

mp

168-170 °C

solubility

650 g/L

density

1.54 g/cm³

bulk density

780 kg/M³

anion traces

sulfate (SO₄^2-): ≤300 ppm

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Related Categories

Amino Acids

Biochemicals

Cell Culture Supplements & Reagents

Thiols

Application

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).

Biochem/physiol Actions

NMDA glutamatergic receptor antagonist.

Analysis Note

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

Storage Class

11 - Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c