Malachite Green, Staining Dye, 0.1% *

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Malachite Green Oxalate, Basic Green 4, Malachite Green oxalate salt, 4-{[4-(Dimethylamino)phenyl](phenyl)methylene}-N,N-dimethyl-2,5-cyclohexadien-1-iminium chloride - ethanedioic acid (1:1:1)
Malachite Green Oxalate

Malachite Green, also known as Aniline Green, Benzaldehyde Green, and Triphenyl Methane has the chemical formula C25H27ClN2O4. It appears as green crystals with a metallic luster and its solution in Water is blue-green in color. Lab Alley’s Malachite Green, Staining Dye contains 0.1% by weight of Malachite Green in a balanced quantity of Water. Chemically pure or Laboratory reagents are two terms often used to describe Lab Grade chemicals. Lab Grade chemicals do not meet any accepted quality or purity requirements such as the ACS Grade, the USP Grade, and the FCC Grade, despite their acceptable purity. In the United States of America (USA), Lab Alley is selling its high-quality Malachite Green, Staining Dye, Lab Grade online at Due to its high purity Malachite Green, Staining Dye, Lab Grade is highly recommended for laboratory testing.

Malachite Green 0.1% Aqueous Solution | 25ml, 100ml & 500ml Bottles | Staining Dye | For Microbiology, Endospore, Ich, Koi Fish Fungus, Fin Rot, Velvet | Aquaculture Antimicrobial | Antibacterial, Antifungal & Antiparasitic

Malachite Green Chemical Properties And Reference Information

Information On Malachite Green From Wikipedia

Malachite green is an organic compound that is used as a dyestuff and controversially as an antimicrobial in aquaculture. Malachite green is traditionally used as a dye for materials such as silk, leather, and paper. Despite its name the dye is not prepared from the mineral malachite, and the name just comes from the similarity of color.

Common Uses
  • Reagent
  • Dye
  • Biological staining
  • Clinical applications
  • Research laboratories


Malachite green is traditionally used as a dye. Kilotonnes of MG and related triarylmethane dyes are produced annually for this purpose. MG is active against the oomycete Saprolegnia, which infects fish eggs in commercial aquaculture, MG has been used to treat Saprolegnia and is used as an antibacterial. It is a very popular treatment against Ichthyophthirius multifiliis in freshwater aquaria. The principal metabolite, LMG, is found in fish treated with malachite green, and this finding is the basis of controversy and government regulation. See also Antimicrobials in aquaculture. MG has frequently been used to catch thieves and pilferers. The bait, usually money, is sprinkled with the anhydrous powder. Anyone handling the contaminated money will find that on upon washing the hands, a green stain on the skin that lasts for several days will result.

Niche Uses Of Malachite Green 

Numerous niche applications exploit the intense color of MG. It is used as a biological stain for microscopic analysis of cell biology and tissue samples. In the Gimenez staining method, basic fuchsin stains bacteria red or magenta, and malachite green is used as a blue-green counterstain. Malachite green is also used in endospore staining, since it can directly stain endospores within bacterial cells; here a safranin counterstain is often used. Malachite green can also be used as a saturable absorber in dye lasers, or as a pH indicator between pH 0.2–1.8. However, this use is relatively rare. Leuco-malachite green (LMG) is used as a detection method for latent blood in forensic science. Hemoglobin catalyzes the reaction between LMG and hydrogen peroxide, converting the colorless LMG into malachite green. Therefore, the appearance of a green color indicates the presence of blood.

Safety and Handling

Please contact us to request a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for Malachite Green, Staining Dye.

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