Polydimethylsiloxane, also known as PDMS, is a silicone polymer with methyl groups. It acts as a defoamer, lubricant and release agent in industrial processes. It also serves as a conditioning ingredient in personal-care products, with further applications in food processing and pharmaceuticals. The material is a clear, colourless, odourless viscous liquid. The catalogue lists food and cosmetic grades, with 200 kg steel drums, 1000 kg IBCs and bulk packaging. Food use as E 900 is subject to the applicable food-additive specification and permitted-use conditions. Cosmetic use is subject to the applicable cosmetic-ingredient conditions. Pharmaceutical use requires the applicable pharmacopoeia grade.