Murexide, also called ammonium purpurate or MX, is the ammonium salt of purpuric acid. It is a purple solid that is soluble in water. The compound was once used as an indicator reagent. Aqueous solutions are yellow at low pH, reddish-purple in weakly acidic solutions, and blue-purple in alkaline solutions.

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

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.

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