Acid Violet 43
INCI: ACID VIOLET 43
An anthraquinone colorant used primarily in hair dye formulations
Effective Concentrations
≤1%
What Is Acid Violet 43?
Acid Violet 43 is a synthetic anthraquinone colorant classified as a coal tar colour. It is used in cosmetic formulations to impart violet or purple hues, and is most commonly found in hair dyes, colours, and coloring rinses. When certified to meet regulatory standards, it may be designated as Ext. D & C Violet No. 2.
As a coal tar-derived ingredient, products containing Acid Violet 43 are subject to specific regulatory labelling requirements and safety protocols to ensure safe use.
How It Works
Acid Violet 43 functions as a colorant by depositing pigment onto the surface and structure of hair fibres. In hair dye formulations, it binds to the hair shaft to create lasting colour.
The ingredient is not typically used in skincare products designed for absorption or active skin benefits, but rather serves a purely cosmetic colouring function in hair care applications.
Clinical Evidence & References
Safety assessments conducted by regulatory bodies including the U.S. FDA have evaluated the safety profile of Acid Violet 43 in hair dye formulations. These assessments indicate that when used at concentrations of 1% or less, the ingredient is considered acceptable for use in hair colouring products.
As with all coal tar colorants, potential for skin irritation exists in some individuals. Manufacturers are required to include caution statements and patch test instructions with products containing this ingredient to help users identify any sensitivity before full application.
Published Research
How to Use
Acid Violet 43 is used only in hair dye and colouring products, not in skincare. If using a hair colour containing this ingredient, perform a patch test on a small area of skin behind the ear or on the inner elbow 24-48 hours before full application to check for any signs of irritation or allergic reaction. Follow all product instructions carefully, including timing and rinsing protocols.
Safety & Precautions
Regulatory information
Standardised cosmetic-ingredient identifiers used by regulators.
Show identifiers
- INCI Name
- ACID VIOLET 43
- EC Number
- 224-618-7
- Function
- Hair Dyeing
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