On March 19, 2026, industry popular science information indicated that dimethyl silicone oil and dimethicone, often confused with each other, are essentially the same chemical substance with the scientific name polydimethylsiloxane and identical physical and chemical properties. They are not two independent compounds, and their core differences only lie in purity grades, industry denominations and application scenarios. Dimethyl silicone oil is a general term covering industrial, food and pharmaceutical grades with a wide viscosity range. It is used for mechanical lubrication and electronic insulation in industry, and added to skin care products and shampoos for softening and defoaming in the daily chemical field, with only the food grade applicable to food processing. Dimethicone is an exclusive abbreviation in the pharmaceutical field, referring specifically to pharmaceutical grade products complying with pharmacopoeia standards. Purified strictly to remove harmful components, it can be taken orally to relieve gastrointestinal flatulence and used externally as an ointment base, safe for pregnant women and infants under guidance. Industrial grade dimethyl silicone oil is strictly prohibited from medical and food applications.
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