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102838 L-Cysteine

Overview

Replacement Information

Key Specifications Table

CAS #Empirical Formula
52-90-4C₃H₇N O₂S

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1028380025
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      1028380100
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          1028381000
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              1028389010
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                  Description
                  Catalogue Number102838
                  Synonymsa-Amino-ß-mercapto propionic acid, αlpha-Amino-ß-mercapto propionic acid, Cys, αlpha-Amino-beta-mercapto propionic acid
                  References
                  Product Information
                  CAS number52-90-4
                  EC number200-158-2
                  Hill FormulaC₃H₇N O₂S
                  Molar Mass121.16 g/mol
                  HS Code2930 90 13
                  Structure formula ImageStructure formula Image
                  Quality LevelMQ100
                  Applications
                  ApplicationL-Cysteine for biochemistry. CAS 52-90-4, pH 4.5 - 5.5 (100 g/l, H₂O, 20 °C).
                  Biological Information
                  Physicochemical Information
                  Density1.66 g/cm3 (45 °C)
                  Ignition temperature420 °C
                  Melting Point>203 °C
                  pH value4.5 - 5.5 (100 g/l, H₂O, 20 °C)
                  Bulk density300 kg/m3
                  Solubility280 g/l
                  Dimensions
                  Materials Information
                  Toxicological Information
                  LD 50 oralLD50 Rat 1890 mg/kg
                  Safety Information according to GHS
                  RTECSHA1600000
                  Storage class10 - 13 Other liquids and solids
                  WGKWGK 1 slightly hazardous to water
                  Disposal3
                  Relatively unreactive organic reagents should be collected in container A. If halogenated, they should be collected in container B. For solid residues use container C.
                  Safety Information
                  Categories of dangerharmful
                  Product Usage Statements
                  Storage and Shipping Information
                  StorageStore below +30°C.
                  Packaging Information
                  Transport Information
                  Supplemental Information
                  Specifications
                  Assay (perchloric acid titration, calculated on dried substance)≥ 99.0
                  Identity (IR-spectrum)passes test
                  Appearancecolorless 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)≤ 0.001 %
                  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 %
                  Global Trade Item Number
                  Catalog Number GTIN
                  1028380025 04022536037363
                  1028380100 04022536037370
                  1028381000 04022536037387
                  1028389010 04022536692678