3-[(3-Carboxy-4-hydroxy-5-methylphenyl)(3-carboxy-5-methyl-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-6-hydroxy-2,4-dimethylbenzoic acid

CAS NO.：2305-53-5
Empirical Formula: C26H22O9
Molecular Weight: 478.45
SAFETY DATA SHEET (SDS)

What is 3-[(3-Carboxy-4-hydroxy-5-methylphenyl)(3-carboxy-5-methyl-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-6-hydroxy-2,4-dimethylbenzoic acid?

Preparation

Formaldehyde (1 Moore) and 2-Hydroxy-3-methylbenzoic acid (2 Moore) condensation, its product in Nitrosylsulfuric acid with 2-Hydroxy-4,6-dimethylbenzoic acid?common oxidation.

Properties and Applications

dark blue purple. Soluble in water for wine red, soluble in ethanol for red wine. In concentrated sulfuric acid for brilliant product red, red orange after diluted. Dye aqueous solution to join sodium hydroxide as wine red.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	5	4	4	4	5	4-5	5

Safety information for 3-[(3-Carboxy-4-hydroxy-5-methylphenyl)(3-carboxy-5-methyl-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-6-hydroxy-2,4-dimethylbenzoic acid

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