Skip to Content

Methylthioninium Chloride

In some countries, this medicine may only be approved for veterinary use.

UK matches:



ATC (Anatomical Therapeutic Chemical Classification)


CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories

Antiseptic agent

Antidote in methemoglobinemia

Diagnostig agent (dye)

Chemical Name

Phenotiazin-5-ium, 3,7-bis(dimetylamino)-, chloride

Foreign Names

  • Methylthioninii Chloridum (Latin)
  • Methylthioninium chlorid (German)
  • Chlorure de Méthylthioninium (French)
  • Cloruro de metiltioninio (Spanish)

Generic Names

  • Bleu de méthylène (OS: DCF)
  • Methylthioninium Chloride (OS: BAN)
  • Metiltioninio clorure (OS: DCIT)
  • Ceruleum methylenum (IS)
  • Methylenblau (IS)
  • Methylene Blue (IS)
  • Methylenum coeruleum (IS)
  • Tetramethylthioninium chloratum (IS)
  • Methylene Blue (PH: USP 38)
  • Methylthionini chloridum (PH: Ph. Int. 2)
  • Methylthioninii chloridum (PH: Ph. Eur. 8, Ph. Int. 4)
  • Methylthioninium Chloride (PH: BP 2016)
  • Methylthioninium chloride (PH: Ph. Eur. 8)
  • Methylthioniniumchlorid (PH: Ph. Eur. 8)

Brand Names


BANBritish Approved Name
DCFDénomination Commune Française
DCITDenominazione Comune Italiana
ISInofficial Synonym
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)

Further information on drug naming conventions: International Nonproprietary Names.

Important Notice: The international database is in BETA release. This means it is still under development and may contain inaccuracies. It is not intended as a substitute for the expertise and judgement of your physician, pharmacist or other healthcare professional. It should not be construed to indicate that the use of any medication in any country is safe, appropriate or effective for you. Consult with your healthcare professional before taking any medication.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.