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Carboxymethylcystein Formulae.png
Carbocisteine 3D.png
IUPAC name
(R)-2-Amino-3-(carboxymethylsulfanyl)propanoic acid
Other names
S-Carboxymethyl-L-cysteine; Mucodyne, Solmux, Rhinathiol, Humex, Lisomucil, Fluditec, Exputex, Mucolit, Reodyn, Carbotoux, Flemex, Carbolin, Muflex
ATC code R05CB03
638-23-3 (R) YesY
2387-59-9 (RS)
ChEBI CHEBI:16163 YesY
ChEMBL ChEMBL396416 YesY
ChemSpider 168055 YesY
DrugBank DB04339 YesY
Jmol-3D images Image
KEGG D06393 YesY
PubChem 193653
Molar mass 179.19 g·mol−1
Appearance Colorless solid
Melting point 204 to 207 °C (399 to 405 °F; 477 to 480 K)
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY verify (what isYesY/N?)
Infobox references

Carbocisteine is a mucolytic that reduces the viscosity of sputum and so can be used to help relieve the symptoms of chronic obstructive pulmonary disorder (COPD) and bronchiectasis by allowing the sufferer to bring up sputum more easily. Carbocisteine should not be used with antitussives (cough suppressants) or medicines that dry up bronchial secretions.

Carbocisteine is produced by alkylation of cysteine with chloroacetic acid.[1]

Trade names[edit]

  • Fluidol, Humotusin: Romania
  • Rhinathiol: Bulgaria, Congo, Hong Kong, Hungary, Latvia, Lithuania, Malaysia, Oman, Romania, Singapore, South Korea, Switzerland, Taiwan, Thailand, Tunisia, and Vietnam[2]
  • Mucodyne: United Kingdom, India, Ireland, Japan, Netherlands, Serbia.
  • Mucoral: Portugal
  • Mucosol: Egypt
  • Solmux, Loviscol: Philippines


  1. ^ Karlheinz Drauz, Ian Grayson, Axel Kleemann, Hans-Peter Krimmer, Wolfgang Leuchtenberger, Christoph Weckbecker “Amino Acids” in Ullmann's Encyclopedia of Industrial Chemistry, 2007, Wiley-VCH, Weinheim. doi:10.1002/14356007.a02_057.pub2
  2. ^