Primary stain reagent for Gram-positive bacteria. Crystal Violet is also known as Gentian Violet and Methyl Violet 10B.

Slow acting decolorizer solution used after non-stabilized iodine solution.

Medium speed decolorizer used after stabilized iodine solution.

Fast acting solution used with automated stainers.

Non-stabilized Lugol solution.

Solution contains polyvinylpyrrolidone iodine (PVP-I).

Counterstain for Gram-negative bacteria, contains Safranine O dye.