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CAS NO 128-08-5

Our high-purity N-Acetyl-L-cysteine (NAC) is a premium-grade supplement widely recognized for its efficacy in antioxidant support and respiratory health. Sourced from trusted pharmaceutical ingredients suppliers, this product meets stringent quality standards for use in nutraceutical applications, clinical research, and mucolytic agent formulations. It is particularly valued in health supplements for supporting glutathione production and combating oxidative stress.


The chemical identifier for this compound is CAS No 128-08-5, which corresponds to N-Acetyl-L-cysteine, a derivative of the amino acid L-cysteine. This white, crystalline powder is highly soluble in water and ethanol, making it suitable for various industrial and medical uses. It is characterized by its distinct sulfurous odor and stability under proper storage conditions.

Product Specifications

  • Molecular Formula: C5H9NO3S
  • Molecular Weight: 163.19 g/mol
  • Appearance: White crystalline powder
  • Purity: ≥99% (HPLC)
  • Solubility: Freely soluble in water and alcohol
  • Storage: Keep in a cool, dry place away from light
Parameter Value
Melting Point 104-107°C
Loss on Drying ≤0.5%
Heavy Metals ≤10 ppm
Residue on Ignition ≤0.1%
Assay (Titration) 98.5-101.5%

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