Methyl blue

• Disodium 2 - [ [4 - [ [4 - [(2- sulfonatophenyl ) amino] phenyl] - [4 - (2- sulfonatophenyl ) imino -1 - cyclohexa - 2,5- dienylidene ] methyl] phenyl] amino] benzenesulfonate ( IUPAC)
• C. I. 42780
• Cotton blue
• Aniline blue water soluble
• Acid Blue 93

Odorless, dark blue - brown - violet powder

Fixed

Poorly in water ( 70 g · l-1 at 20 ° C)

Attention

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Methylene blue is a triphenylmethane dye. Both the mixture with the very similar blue water and these two pure substances themselves are often referred to as aniline blue, water soluble ( CAS: 8004-91-9 ) refers. It itself should not be confused with the similar name of the methylene blue.

Properties

Methylene blue has its absorption maximum in the wavelength range below 600 nm, the dye is soluble in water.

Use

Methylene blue stains collagen blue in tissue structures. It is used as a dye for staining of histological sections polychrome, in cytology and pH indicator (pH 9.4 to 14.0 ).