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Ingredient · Adhesive / resin

Styrene/methylstyrene copolymer

Mixed · 6/10, higher is cleaner

How we reached this

Synthetic polymer used as adhesive/binder in diaper construction. FDA-permitted indirect food contact (21 CFR 177). High molecular weight = not dermally absorbed. Polymerization is complete; residual styrene monomer is the dermal concern (held below ppm by EU + FDA specs). End-of-life: not biodegradable.

Sources · 1

Products containing this · 2

About this rating

Ratings run 1–10, higher is cleaner, and are set editorially against the sources above — see the methodology page for how an ingredient rating becomes part of a product score. Last reviewed 2026-05-25.