S-(Carboxymethyl)-L-cysteine structural formula

CAS Number 638-23-3
Molecular Formula C5H9NO4S
Molecular Weight 179.191 g/mol
LogP -1.65
  • S-(Carboxymethyl)-L-cysteine
  • L-Cysteine, S-(carboxymethyl)-
  • 638-23-3
  • S-Carbocysteine
  • (R)-S-(Carboxymethyl)cysteine
  • (L)-2-Amino-3-(carboxymethylthio)propionic acid
  • BRN 1725012
  • S-Carboxylmethyl-L-cysteine
  • 3-(Carboxymethylthio)-L-alanine
  • EINECS 211-327-5
  • Muciclar
  • Mucocis
  • Mucodyne
  • NSC 14156
  • Reomucil
  • Rhinathiol
  • Rinatiol
  • Thiodril
  • Transbronchin
  • Bronchokod
  • Lisomucil
  • Superthiol sirup
  • Mucojet sirup
  • Mucolex sirup
  • Siroxyl
  • Carbocisteina
  • Carbocisteinum
  • Mucotron
  • UNII-740J2QX53R
  • L-(Carboxymethyl)cysteine
  • Mucolase
  • Loviscol
  • Chilvax
  • PectDrill
  • Mucotab
  • Mucosol
  • L-3-((carboxymethyl)thio)alanine
  • S-(carboxymethyl)-(R)-cysteine
  • S-carboxymethylcysteine
  • carbocysteine
  • S-carboxymethyl-L-cysteine
  • 11139-64-3


Separation of S-(Carboxymethyl)-L-cysteine on Newcrom R1 HPLC column

S-(Carboxymethyl)-L-cysteine can be analyzed by this reverse phase (RP) HPLC method with simple conditions. The mobile phase contains an acetonitrile (MeCN), water, and phosphoric acid. For Mass-Spec (MS) compatible applications the phosphoric acid needs to be replaced with formic acid. Smaller 3 µm particles columns available for fast UPLC applications. This liquid chromatography method is scalable and can be used for isolation impurities in preparative separation. It also suitable for pharmacokinetics.

Separation of S-(Carboxymethyl)-L-cysteine on Newcrom R1 HPLC column
Newcrom R1

This column is available in new type of hardware with only one connection end. Learn more about performance and advantage of this new hardware.

Application Analytes:


HPLC Determination of Carbocisteine on Primesep 100 Column
Carbocisteine Carbocisteine, or carbocysteine, is a drug designed to clear the mucus from the upper and lower airways. It’s primarily available in tablet form. It can be retained on a Primesep 100 Column in about 5 minutes. Primesep 100 is a reverse-phase (RP) mixed-mode column with embedded acidic ion-pairing groups.


Column Primesep 100, 4.6x150 mm, 5 µm, 100A
Mobile Phase MeCN/H2O - 10/90%
Buffer H2SO4 - 0.05 %
Flow Rate 1.0 ml/min
Detection UV, 200 nm


Class of Compounds Acid, Hydrophilic, Ionizable, Carboxylic acid, Drug, Carbocyclic, Amino acid
Analyzing Compounds Carbocisteine

Application Analytes:


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