Malachite green

Description

Malachite green · CAS 569-64-2 · C23H25N2.Cl. UNII 12058M7ORO. Solubility: In water, 4.0X10+4 mg/L at 25 °C; LogP: log Kow = 0.62; Ionization Efficiency: 4.27.

Identification

CAS Registry Number	569-64-2
PubChem CID	11294
Molecular formula	C23H25N2.Cl
IUPAC name	[4-[[4-(dimethylamino)phenyl]-phenylmethylidene]cyclohexa-2,5-dien-1-ylidene]-dimethylazanium chloride
UNII (FDA)	12058M7ORO

Computed Descriptors

Molecular Weight	364.9
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	3
Exact Mass	364.1706265
Monoisotopic Mass	364.1706265
Topological Polar Surface Area	6.3
Heavy Atom Count	26
Formal Charge	0
Complexity	516

Physical & Chemical Properties

Solubility	In water, 4.0X10+4 mg/L at 25 °C
LogP	log Kow = 0.62
Ionization Efficiency	4.27
Ionization Efficiency	2.7
Ionization Efficiency	MeCN (80%)
Ionization Efficiency	DOI:1H/q+1

Physical description & handling notes

• C.i. basic green 4 appears as green crystals with metallic luster. Water solutions are blue-green. Used in dyeing silk, wool, biological staining, etc.
• Wet Solid; Liquid
• Green metallic solid; [HSDB]
• Green crystals with metallic luster
• Sol in alcohol, methanol, amyl alcohol
• Sol 1 /part/ in 15 /parts/ of water and 1 /part/ in 15 /parts/ of alcohol.

Regulatory Status

Regulatory & Food Contact	CONTAMINANTVeterinary Drug -> ANTIMICROBIAL_AGENT: Food Contaminant TRS 954-JECFA 70 MALACHITE GREEN.pdf

GHS Hazard Classification

Reported hazard statements	H302, H318, H400, H410, H301 (21.4%), H361 (99.5%), H314 (100%), H351 (100%)

Documented Uses

• Used as a fungicide, textile dye (silk, wool, jute, leather, and cotton) biological stain, reagent, and pH indicator; [HSDB]
• Textiles (Printing, Dyeing, or Finishing) [Category: Industry]
• For directly dyeing silk, wool, jute and leather; dyeing cotton after mordanting. Biological stain, clinical reagent (inorganic phosphate assay). As spot test reagent for detecting sulfurous acid and cerium. As acid-base indicator ...
• THERAP CAT (VET): Fungicide and parasiticide in fish. /SRP: Prohibited for use in aqua-culture in many parts of the world/.
• For more Uses (Complete) data for MALACHITE GREEN (6 total), please visit the HSDB record page.
• Food Contaminant -> CONTAMINANTVeterinary Drug -> ANTIMICROBIAL_AGENT -> JECFA Functional Classes

Synonyms

MALACHITE GREEN; 569-64-2; Basic Green 4; Malachite green chloride; Aniline Green; China Green; Victoria Green B; Grenoble Green; Diamond Green B; Benzaldehyde Green; Victoria Green; Benzal Green; Burma Green B; Diamond Green Bx; Light Green N; Solid Green O

Frequently Asked Questions

What are the CAS number and molecular formula of Malachite green?

CAS 569-64-2; molecular formula C23H25N2.Cl; molecular weight — g/mol.

What other names is Malachite green known by?

MALACHITE GREEN, 569-64-2, Basic Green 4, Malachite green chloride, Aniline Green, China Green.

What is the regulatory status of Malachite green?

Documented regulatory listings: CONTAMINANTVeterinary Drug -> ANTIMICROBIAL_AGENT: Food Contaminant; TRS 954-JECFA 70; MALACHITE GREEN.pdf.

Is Malachite green classified as hazardous?

Hazard statements reported: H302, H318, H400, H410, H301.

What are the key physical properties of Malachite green?

Solubility: In water, 4.0X10+4 mg/L at 25 °C; LogP: log Kow = 0.62; Ionization Efficiency: 4.27; Ionization Efficiency: 2.7.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.