6028. Methyl Blue

Nomenclature

CAS number: 28983-56-4
[[4-[Bis[4-[(sulfophenyl)amino]phenyl]methylene]-2,5-cyclohexadien-1-ylidene]amino]benzenesulfonic acid disodium salt; sodium triphenyl-p-rosanilinetrisulfate; brilliant cotton blue; Helvetia blue; C.I. Acid Blue 93; C.I. 42780.
C37H27N3Na2O9S3; mol wt 799.80.
C 55.56%, H 3.40%, N 5.25%, Na 5.75%, O 18.00%, S 12.03%.

Description and references

Do not confuse with methylene blue. Prepn: Colour Index vol. 4 (3rd ed., 1971) p 4403.

Chemical structure

Properties

Dark blue powder. Sol in water. Absorption max about 607 nm.

Use

As a coloring; dye for cotton and silk; biological stain.

Therapeutic Category

Antiseptic.

Keywords

Antiseptic/Disinfectant; Dyes