Methyl violet



Methyl violet 2B
IUPAC name Methyl violet 2B
Identifiers
CAS number 8004-87-3
SMILES [Cl-].CN(C)c1ccc(cc1)C(=C2C=CC(=[NH2+])
C=C2)c3ccc(cc3)N(C)C
Properties
Molecular formula C24H28N3Cl
Molar mass 393.958 g/mol (6B)
Melting point

137 °C (279 °F)

Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Methyl violet is the name given to a group of similar dyes. Methyl violets are mixtures of tetramethyl, pentamethyl and hexamethyl pararosanilins. By blending the different versions, the dyemaker can create different shades of violet in the final dye. The more methylated the compound (the more methyl groups attached), the deeper blue the final color will be:

  • Tetramethyl (four methyls) is known as methyl violet 2B, and this specific chemical finds uses in chemistry and medicine.
  • Pentamethyl (five methyls) is known as methyl violet 6B, and is darker (in dye form) than 2B.
  • Hexamethyl (six methyls) is known as methyl violet 10B, or specifically as crystal violet. This is much darker than 2B, and often darker than 6B.

In pure form, the tetramethyl appears as F).

The main use of methyl violet (by sheer volume used worldwide) is to dye textiles purple and give deep violet colors in paints and printing ink.

Methyl violet 2B (simply called methyl violet) is used in alkaline end, it becomes bluish-violet. Methyl violet can be supplied as premade pH testing paper, or it can be supplied as pure crystals and dissolved in the sample being checked.

Methyl violet 2B (pH indicator)
below pH 0.0 above pH 1.6
0.0 ↔ 1.6

In medicine, Methyl Violet 10B is known as disinfectant. Gentian violet is very poisonous to most animals, dogs and cats included — do not use it as a disinfectant for animals' skin.

Methyl violet has also the ability of binding mutations and cancers.

Methyl violets are soluble in water, diethylene glycol, and dipropylene glycol. Specifically, methyl violet 6B is 2.93% soluble in water and 15.21% soluble in ethanol.

Methyl violet should not be confused with methylene blue, two other stains.

References
     
    This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Methyl_violet". A list of authors is available in Wikipedia.