Methyl blue

CAS Registry Number®

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CAS Name

Methyl blue

Molecular Formula


Cite this Page

Methyl blue.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d. (retrieved 2021-09-25) (CAS RN: 28983-56-4).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Other Names and Identifiers

Other Names for this Substance

  • Benzenesulfonic acid, [[4-[bis[4-[(sulfophenyl)amino]phenyl]methylene]-2,5-cyclohexadien-1-ylidene]amino]-, sodium salt (1:2)
  • C.I. Acid Blue 93, disodium salt
  • C.I. Acid Blue 93
  • Methyl blue
  • Benzenesulfonic acid, [[4-[bis[4-[(sulfophenyl)amino]phenyl]methylene]-2,5-cyclohexadien-1-ylidene]amino]-, disodium salt

Deleted or Replaced CAS Registry Numbers