Acid Violet 43

Safety Information

Batches of acid violet 43 that are certified to meet the specifications of the Food and Drug Administration (FDA) are called Ext. violet 2. The FDA allows Ext. violet 2 to be used to color externally applied cosmetics and personal care products when it conforms to FDA specifications. Please search for Ext. violet 2 on this website for more information about this colorant. The safety of acid violet 43 has been assessed by the Expert Panel for Cosmetic Ingredient Safety. The Expert Panel evaluated the scientific data and concluded that acid violet 43 was safe for use in hair dye formulations when impurities were minimized.

Oral toxicity tests do not demonstrate significant acute toxicity. In a short-term dermal toxicity study and a subchronic dermal toxicity study, no signs of systemic toxicity and no significant local skin reactions were noted. This ingredient was not genotoxic in bacterial assays, nor was it carcinogenic when applied to skin at a 1% concentration. Accordingly, acid violet 43 was determined to be safe for use in hair dye formulations, with limitations on impurities.

More information about the safety of hair dyes.

In the European Union, Acid Violet 43, as CI 60730, may be used to color cosmetic products, with the exception of products intended to come in contact with mucous membranes (see Annex IV).


Acid Violet 43

What Is It?

Acid Violet 43 is an anthraquinone color used in the formulation of hair dyes and colors.

Why Is It Used?

Acid Violet 43 imparts color to hair. The exact color obtained will depend on the other ingredients that are used in the preparation and the starting color of the hair.

Scientific Facts

Acid Violet 43 is a synthetic pigment sometimes referred to in general terms as an anthraquinone color. Acid Violet 43 has a bluish violet hue in daylight and is slightly redder in artificial light.

Hair dyeing formulations belong to three categories – temporary, semi-permanent and permanent coloring of hair. The permanent hair dyeing formulations are often referred to as oxidative hair dyes which are generally marketed as two-component products. One component contains the compounds (precursors) that become the colorants and the other component is a stabilized solution of hydrogen peroxide. The two components are mixed immediately prior to use. The precursors and peroxide diffuse into the hair shaft, where color formation takes place after the ingredients combine to produce the coloring mixture. The precursors are oxidized by the hydrogen peroxide to form the colorant molecules. These molecules are too large to escape from the hair structure. The hydrogen peroxide in the oxidative hair dye product also serves as bleaching agent for the natural pigment of the hair. The color that is formed depends on the precursors and direct dyes present in the dyeing solution, pH of the dyeing solution and the time of contact of the dyeing solution with the hair. Acid Violet 43 is benzenesulfonic acid, 2-[(9,10-dihydro-4-hydroxy-9,10-dioxo-1-anthracenyl)amino]-5-methyl-, monosodium salt. Acid Violet 43 functions as a hair colorant. When used in products other than hair dyes and colors, it must be certified by the FDA.