Skip to Content

Methylrosanilinium Chloride

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



CAS registry number (Chemical Abstracts Service)


Chemical Formula


Molecular Weight


Therapeutic Categories


Antifungal agent

Anthelmintic agent

Antiseptic agent, topical

Chemical Names

N-[4-[Bis[4-(dimetylamino)phenyl]metylene]cyclohexa-2,5-dienylidene]-N-metylmetanaminium chloride (hexametyl-p-rosanilinium chloride) (BP, Ph. Eur.)

[4-[Bis[p-(dimetyl-amino)phenyl]metylene]-2,5-cyclohexadien-1-ylidene]-dimetylammonium chloride (USAN)

Benzenemetanol, 4-(dimetylamino)-α,α-bis[4-(dimetylamino)phenyl]-, hydrochloride

Metanaminium, N-[4-[bis[4-(dimetylamino)phenyl]-metylene]-2,5-cyclohexadien-1-ylidene]-N-metyl-, chloride (USAN)

Foreign Names

  • Methylrosanilinii Chloridum (Latin)
  • Methylrosanilinium chlorid (German)
  • Chlorure de Méthylrosanilinium (French)
  • Cloruro de metilrosanilina (Spanish)

Generic Names

  • Méthylrosanilinium (chlorure de) (OS: DCF)
  • Methylrosanilinium Chloride (OS: BAN, JAN)
  • Basic violet (IS)
  • Cl 42555 (IS)
  • Crystal violet (IS)
  • Crystalloviolaceum (IS)
  • Gentian Violet (IS)
  • Gentianaviolett (IS)
  • Methylrosanilinium chloratum (IS)
  • Metilrosanilino cloruro (IS)
  • Violet cristallisé (IS)
  • Violeta de Genciana (IS)
  • Crystal Violet (PH: BP 1980)
  • Gentian Violet (PH: USP 37)
  • Methylrosanilinii chloridum (PH: Ph. Eur. 8, Ph. Int. 4)
  • Methylrosanilinium chloratum (PH: Ph. Helv. VI)
  • Methylrosanilinium Chloride (PH: BP 2015, JP XVI, Ph. Int. 4)
  • Methylrosanilinium chloride (PH: Ph. Eur. 8)
  • Methylrosaniliniumchlorid (PH: Ph. Eur. 8)
  • Violet cristallisé (PH: Ph. Franç. 11)

Brand Names

International Drug Name Search


BANBritish Approved Name
DCFDénomination Commune Française
ISInofficial Synonym
JANJapanese Accepted Name
OSOfficial Synonym
PHPharmacopoeia Name
Rec.INNRecommended International Nonproprietary Name (World Health Organization)
USANUnited States Adopted Name

Click for further information on drug naming conventions and 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.