What is cyclopentasiloxane? Cyclopentasiloxane,
also known as decamethylcyclopentasiloxane or D5,
is a type of silicone, often used in
cosmetics, personal care products, and
certain medical applications. Its main function
is as a conditioner, delivery agent, lubricant,
and solvent, providing a silky, smooth feel when
applied to the skin or hair. Its low surface
tension allows it to spread easily and fill in
fine lines or wrinkles. The substance is volatile,
meaning it evaporates quickly, leaving behind
no residue or build-up. Despite these benefits,
there are concerns about its environmental
impact. While generally considered safe for
human use, it's non-biodegradable
and persistent in the environment,
which has led to regulatory scrutiny
and calls for alternatives. It's still
widely used, but manufacturers are
exploring more sustainable options.