The European Chemicals Agency is set to identify 20 chemicals as 'substances of very high concern' due to their potentially hazardous impact on health and the environment.
The chemicals will be subject to public consultations, which will run until 13 October.
The agency added that comments should focus on the hazardous properties that qualify the chemicals as concerns, the substance identity and the availability of safer alternatives or techniques.
The comments will be reviewed by a member state committee.
Some of the substances proposed as 'substances of very high concern include dichromium trischromate, pentazinc chromate octahydroxide, calcium arsenate, aluminosilicate refractory ceramic fibres, bis (2-methoxyethyl) phthalate, calcium arsenate and lead styphnate.