52-90-4: Acetylcysteine EP Impurity B

Acetylcysteine EP Impurity B (CAS No: 52-90-4) or L-Cysteine is an impurity formed during the synthesis of Acetylcysteine that is a significant mucolytic agent used to reduce the viscosity of pulmonary secretions in respiratory diseases and is a prominent antidote in treating paracetamol poisoning.

Additional information

Catalogue No.

VE005991

CAS No.

52-90-4

Molecular Formula

C3H7NO2S

Molecular Weight

121.16

IUPAC Name

(R)-2-Amino-3-mercaptopropionic acid

Synonyms

L-Cysteine

References

Toussaint, B., et al. “Quantitative Analysis of N-Acetylcysteine and Its Pharmacopeial Impurities in a Pharmaceutical Formulation by Liquid Chromatography–UV Detection–Mass Spectrometry.” Journal of Chromatography A, vol. 896, no. 1-2, Oct. 2000, pp. 191–99, https://doi.org/10.1016/s0021-9673(00)00741-x.

Status

In-stock