Product Name: N Acetyl L Cysteine Alias: NAC N Acetyl Cysteine CAS Number: 616-91-1 Molecular Formula: C5H9NO3S Molecular Weight: 163.19 Test Method: HPLC Assay: Min 99.0 percent Appearance: White to off white crystalline powder Odor: Slight characteristic sulfur odor Solubility: Freely soluble in water, slightly soluble in ethanol