CosmeticOBS - L'Observatoire des cosmétiques
Sept. 17, 2019SCCS

Tetrabromophenol Blue (C183): a new Opinion of the SCCS pro Add to my portfolio
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Tetrabromophenol Blue (C183): a new Opinion of the SCCS

The SCCS has published its Opinion on the safety of a hair dye ingredient, Tetrabromophenol Blue (C183). This Opinion has been adopted by written procedure on 10 September 2019, and is opened to comments until 11 November 2019.

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Background

The hair dye Tetrabromophenol Blue (C183), with the chemical name 4,4’-(4,5,6,7-Tetrabromo1,1-dioxido-3H-2,1-benzoxathiol-3-yliden)bis-2,6-dibromophenol (CAS 4430-25-5) is intended to be used as a hair dye in oxidative and non-oxidative hair colouring products with a final on-head concentration up to 0.2%.
A series of submissions from the industry on this substance have been evaluated by scientific committees.
The latest evaluation by the SCCS has the following conclusions:
“The margin of safety calculated in this Opinion relates to the previously supplied batch quality of the material. However, because of the large discrepancies noted between the specifications provided for the representative market quality batch intended for commercial use and that used in toxicological testing, SCCS cannot conclude on the safety of Tetrabromophenol Blue (C183).”
Submission IV, received in July 2018 from Cosmetics Europe, provides additional data to address the concerns of the SCCS.

For an exhaustive background information, see the article
Hair dyes A160 and C183, Preservative HEPB: three requests for Opinions to SCCS, CosmeticOBS, 29 October 2018

Opinion

In light of the new data provided, does the SCCS consider Tetrabromophenol Blue (C183) safe when used as a hair dye in oxidative and non-oxidative hair colouring products with a final onhead concentration of up to 0.2%?

The data on chemical composition of Tetrabromophenol ...