Indigofera tinctoria (C170) with CAS number 84775-63-3 has been scrutinized by the SCCS since 2003. The first SCCS opinion called for “a complete safety dossier on Indigofera tinctoria is required”.
The second SCCS opinion was adopted in 2012 with the following conclusion: “the safety of Indigofera tinctoria used as a hair dye at a maximum concentration on the head of 25% cannot be assessed due to incomplete information. The safety of Indigo (CI 73 000) used as a colorant should be re-assessed.”
The SCCS considers in its third opinion issued in January 2020 that Indigofera tinctoria is safe when used in non-oxidative condition hair colouring products as on-head concentrations of up to 25%.
Moreover, it considers it as a weak skin sensitisation potential cannot be excluded for Indigofera tinctorial. The opinion is open to public comments until 13 March 2020.
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