• N-Acetyl-L-Cysteine



【CAS No.】616-91-1
【Molecular formula】C5H9NO3S
【Molecular weight】163.20
【Appearance】White crystals or crystalline powder with a garlic-like odor and sour taste.
【Solubility】easily soluble in water or ethanol, insoluble in chloroform. Acidic in aqueous solution (pH2-2.75 in 10g/L H2O), mp 101-107℃

Item of Test Limits of Test Results of Test
Appearance White crystalline or crystalline powder White crystalline or crystalline powder
Assay(HPLC) >99% 90.66%
Sieve analysis 100% pass 80 mesh Conforms
Specific optical rotation ‘+5.6 °- +8.9 ° ’+5.5 °- +7.0 °
State of solution (Transmittance) --- >= 98.0% clear and colorless
Chloride (Cl) --- 19.89-20.29%
Ammonium(NH4) --- =< 0. 002%
Heavy Metal <10ppm Conforms
As <2ppm Conforms
Yeast & Mold <1000cfu/g 95cfu/g
E. Coli <100cfu/g 33cfu/g
S. Aureus Negative Absent
Saimonella Negative Absent
Pesticides Negative Absent
Conclusion Conform with specification  
Storage Store in 2-8, cool & dry place, Keep away from strong light and heat.