Malachite green hemioxalate

UsesBasic Green 4 is used in Local, Anti-Infective Agents; Industrial, Fungicides. As an internal antiseptic, it is administered to treat canine dysentery ad calf scours, whereas as an external antiseptic it can be applied to abrasions and infected wounds as a triple dye that consists of gentian violet, brilliant green, and rivanol . Malachite green oxalate (arylmethane dye) is also used as a remedy for mycotic infections in aquaculture. Traditionally, malachite green is used as a dye .

UsesBiological stain, dye reagent, acid base indicator: pH 0.0 yellow, 2.0 green;11.6 green, 14 colorlessMalachite Green oxalate is used as the staining solution for embedded botanical material and as a spore stain. It is also used in studying the photocatalytic degradation with TiO2/WO3. It is employed for determining phosphate in serum and as a reference material in analytical chemistry for the quantification. It is also used as a pH indicator between pH 0.2 - 1.8. It is used as a dye for materials such as silk, leather, and paper.

UsesMalachite Green oxalate salt has been used:in the preparation of Alexander staining solution for cell viability testin malachite green-ammonium molybdate assay for determining the adenosine triphosphatase (ATPase) activity of binding immunoglobulin protein (BiP)as a hydrophobic ion, to study the label-free molecular transport in the living cell membranes of Escherichia coli in real time by second-harmonic generation (SHG) method

General DescriptionMalachite Green is used for bacterial spore staining by Schaeffer and Fulton`s method. It can also be used in place of methyl green in the Pappenheim stain, when combined with the Gram stain.

PreparationTo prepare Basic Green 4, 14 grams of benzaldehyde and 35 grams of dimethylaniline are combined with 31.5 grams of concentrated hydrochloric acid and the contents are heated to 1000 C for a period of 24 hours with the aid of a reflux condenser. The alkalinity of the resulting solution is enhanced by sodium hydroxide, then the reacting mass is distilled over steam to get rid of traces of dimethylaniline and benzaldehyde. The addition of 1 liter of water to the leuco base allows for the separation of hard granules. The granules are then filtered and the compound is unbound from alkali . Notably, the oxidation of the leuco base starts by melting 10g of the base over heat and adding a mixture of 4g of acetic acid and 27g of hydrochloric acid and about 3000ml of water. Nonetheless, 7.5g of a fine paste comprising refined lead oxide is gradually mixed in while stirring should continue for about 2 hours after the initial addition. Moreover, the unreacted lead oxide is obtained through filtration and the resulting filtrate is exposed to heat until it attains its boiling point, after which sodium sulfate is incorporated to separate excess lead. The resulting solution is then placed under heat to bring it to boil for effective precipitation with sodium hydroxide. Upon cooling, it is then filtered, washed, dehydrated, and further broken down in light petroleum, then impurities are filtered off, the resulting solution is evaporated to remove petrol, which yields pure Basic Green 4.