Malachite green oxalate, green powder C.I. 42000

Supplier: MP Biomedicals
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Synonyms: Bis (N-{4-[[4-(dimethylamino)phenyl](phenyl)methylene]cyclohexa-2,5-dien-1-ylidene}-N-methylmethanaminium) trioxalateN-[4-[[4-(Dimethylamino)phenyl]phenylmethylene]-2,5-cyclohexadien-1-ylidene]-N-methyl-methanaminium, ethanedioate, ethanedioate(2:2:1)Basic Green 4Malachite green hemioxalateN,N,N',N'-Tetramethyl-4,4'-diaminotriphenylcarbenium oxalate

ICNA0215264280EA 114 GBP
ICNA0215264280 ICNA0215264225
Malachite green oxalate, green powder C.I. 42000
Malachite green oxalate

Malachite green is use as counter-stain against fuchsin which stains gram-positive and gram-negative bacteria reddish colors and safranin which stains nuclei red. Malachite green stain background to the surrounding tissue blue-green.


Malachite green is also used as a pH Indicator between pH 0.2 (green) - 1.8 (blue-green). Used as a botanical counterstain.


Soluble in water (40 mg/ ml), EGME (40 mg/ ml), EtOH (50 mg/ ml).

Formula: C₅₂H₅₄N₄O₁₂
MW: 927.02 g/mol
MDL Number: MFCD00011766
CAS Number: 2437-29-8
UN: 2811
ADR: 6.1,III
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Specification Test Results

Identity Test Passes
UV/Vis: l max (water) 614 - 618 nm

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