Titanium dioxide proposed to be classified as suspected of causing cancer when inhaled
The European Chemicals Agency’s (ECHA's) Committee for Risk Assessment (RAC) has concluded that the available scientific evidence meets the criteria in the Classification, Labelling and Packaging (CLP) Regulation to classify titanium dioxide as a substance suspected of causing cancer through the inhalation route. The opinion will be formally adopted later by written procedure or at the September RAC meeting.
The committee assessed the carcinogenic potential of titanium dioxide against the criteria in the CLP Regulation and, having considered the available scientific data, concluded that it meets the criteria to be classified as suspected of causing cancer (category 2, through the inhalation route).
The committee also concluded that there was insufficient evidence to classify titanium dioxide in the more severe category for carcinogenicity (category 1B) as was originally proposed by the dossier submitter, France. This more severe category refers to a substance which is presumed to cause cancer. The original proposal suggested that the classification should apply to ‘both fine particles and nanomaterials of TiO2 without being able of any distinction in terms of morphology, crystal phase, and surface treatment,’ but it is not yet clear to what extent this recommendation has been adopted by the RAC.
Following adoption, the opinion will go through a normal editorial check before it is sent to the European Commission for final decision making. The opinion will also be made available on ECHA’s website at the same time.