Dioxins are a by-product of chlorine, which is used to bleach disposables. They are listed as carcinogenic chemicals and are banned in most countries!
Sodium polycarbonate is the absorbent compound used in disposables. This chemical was removed from tampons due to toxic shock syndrome concerns.
Phthalates make the plastic in disposables softer and resilient. They are known endocrine disruptors and may be carcinogenic.