Product: N-Acetyl-L-Cysteine              CAS NO.:(616-91-1)
Item	Specification(AJI92)	Result
Specific rotation[a]D20	+21.3° to +27.0°	+23°
State of solution (Transmittance)	Clear and colorless Not less than 98.0%	99.0%
Chloride(Cl)	≤ 0.04%	≤ 0.04%
Ammonium(NH4)	≤ 0.02%	≤ 0.02%
Sulfate (SO4)	≤ 0.030%	≤ 0.020%
Iron(Fe)	≤ 20ppm	≤ 5ppm
Heavy metals(Pb)	≤ 10ppm	≤ 5ppm
Arsenic(as As2o3)	≤ 1ppm	≤ 1ppm
other amino acids	Chromatographically Not detectable	Conforms
Loss on drying	Not more than 0.5%	0.2%
Residue on ignition(sulfated)	≤ 0.50%	0.04%
Assay	98.5% to 101.0%	99.9%
PH	2.0 to 2.8	2.3
Melting point	106 to 110℃	106 to 110℃