Dimethylpolysiloxane (E 900)

Last reviewed October 19, 2026

In plain words: Dimethylpolysiloxane (E 900 / INS 900a) is a silicone polymer used as an antifoaming agent. It is used in foods such as frying oils, juices, jams and some drinks, and is called dimethicone in cosmetics.

Identity

Dimethylpolysiloxane. Number: E 900 / INS 900a. Function: antifoaming agent. Typical foods: frying oils, juices, jams, some drinks. What it is: a silicone polymer (called dimethicone in cosmetics).

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This page is for general education. It is not medical advice and does not replace advice from your doctor, pediatrician, allergist or registered dietitian. Research changes; we review these pages when new evidence or rules come out. Last reviewed October 19, 2026.