L-Cysteine Hydrochloride Monohydrate 99.0-100.5% Letterbox Friendly


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L-Cysteine is an α-amino acid. It is a semi-essential amino acid, which means that it can be biosynthesized in humans.

Please note this is not the same as N-Acetylcysteine.

  • Organic Synthesis
  • Wave Applications (Hair)
  • Breaking up Disulphide bonds in hairs keratin
  • Precursor in food, pharmaceutical and personal car industries

Minimum Assay: 99.0-100.5%
Molecular Formula: C3H7NO2S•HCl•H2O
Molecular Weight: 175.64 (157.62anhy)
Melting Point: 175 deg C
Specific Rotation [0]D20: +5.5 to +7.0
Sensitivity: Air Sensitive
pH: 1.5 – 2.0
State of Solution: >98%
Chloride (cl): 19.89-20.29%
Sulphate (SO4): <0.020%
Ammonium (NH4): <0.02%
Heavy Metals (as Pb): <10ppm
Loss on drying: 8.5 – 12.0%
Iron Content: <10ppm
Residue on Ignition: <0.10%
Other Amino Acids: Chromatographically undetected

Cas Number: 7048-04-6

Einecs Number: 200-157-7

Hazard Phrases: H315,H319,H335

Prec Phrases: P261,P280,P302+P352,P305+P351+P338,P312,P403+P233

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