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Wednesday, November 13, 2019Ingredients

Dihydroxyacetone for hair colouring: Opinion of the SCCS

Dihydroxyacetone pour les colorations capillaires : Opinion du CSSC

The SCCS has published its Opinion on the safety of Dihydroxyacetone as hair colouring ingredient. This Opinion has been adopted during the plenary meeting of 30-31 October 2019, and is opened to comments until 20 January 2020.

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Background

Dihydroxyacetone (DHA) with the chemical name 1,3-Dihydroxy-2-propanone (CAS No.96-26-4, EC No.202-494-5) is a cosmetic ingredient with the reported functions of skin conditioning, reducing and tanning. Currently DHA is not regulated under the Cosmetic Regulation (EC) No.1223/2009.
It is requested to assess the safety of DHA intended to be used as hair colouring ingredient in leave-on applications up to a maximum concentration of 6.25%.

For an exhaustive background information, see the article
SCCS: Requests for Opinions on 3 nanos and DHA, CosmeticObs, 1st July 2019

Opinion

1. In light of the data provided, does the SCCS consider Dihydroxyacetone safe when used as hair colouring ingredient in leave-on applications up to a maximum concentration of 6.25%?

On the basis of data provided, the SCCS considers Dihydroxyacetone safe when used as hair colouring ingredient in leave-on applications up to a maximum concentration of 6.25%.
The use of Dihydroxyacetone as hair colouring ingredient in leave-on applications up to a maximum concentration of 6.25% together with the use of self-tanning lotion and face cream containing up to a maximum concentration of 10% Dihydroxyacetone is also considered safe.

2. Does the SCCS have any further scientific concerns with regard to the use of …

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