Styrene
Volatile Organic Compound; Monomer; Fragrance-related Chemical
Styrene has significant inhalation and occupational toxicity concerns and is classified by IARC as probably carcinogenic to humans (Group 2A). Residual exposure should be minimized in cosmetic-related materials.
Why Oh Daisey rates it this way
Styrene has significant inhalation and occupational toxicity concerns and is classified by IARC as probably carcinogenic to humans (Group 2A). Residual exposure should be minimized in cosmetic-related materials.
What it does
Primarily used as an industrial monomer in polymers and plastics; may occur as a residual monomer or contaminant rather than an intentional skincare ingredient.
How to read this rating
This rating reflects the Oh Daisey ingredient standard and the evidence currently available for cosmetic use. Product safety can also depend on concentration, exposure route, formulation, manufacturing quality, and individual sensitivity.