Malachite Green Oxalate Crystals C.I. 42000



Malachite Green Oxalate is often used as a counterstain in histological tissue sections and for staining bacterial polysaccharides and spores. Commonly used as a counter stain in the Ziehl-Neelsen procedure.

  • Parasiticide
  • Blue-green counterstain
  • Biological Drye Dye
  • Stain Manufacture

Colour Index: C.I. 42000
Molecular Formula: C52H54N4O12 
Molecular Weight: 927.02
Wavelength of Maximum Absorption, λ Max (in 50:50 IMS:Water): 623nm
Absorption Ratio (A λ max-15nm/A λmax+15nm): 1.01
Specific Absorption (A 1% in 10nm Cell) AT, λmax: 1814
Maximum Loss on Drying at 105 deg C: 10%
Synonyms: Basic Green 4

Hazard Class: 6.1

Packing Group: 3

Hazard Phrases: Toxic if swallowed. Causes serious eye damage. Very toxic to aquatic life with long lasting effects.

Prec Phrases: Avoid release to the environment. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Dispose of contents/container.


Cas No: 2437-29-8
Einecs No: 219-441-7


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Additional information

Weight N/A
Pack Size

5gm, 25gm, 100gm