The Ricca Chemicals methyl violet with a composition of 100% methyl violet, is suitable for use in laboratory use only. It can be stored at a temperature of 15 to 30 degree C.

Methyl Red sodium salt is the sodium salt of Methyl Red. Methyl red is an indicator dye that turns red in acidic solutions. It is a pH indicator, turning red under pH 4.4, yellow over pH 6.2, and orange in between those values.