s silicone-free shampoo a false proposition 7
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Since silicone oil is highly inert, it is generally considered safe to use it in skin care products and cosmetics. Silicone oil is added to most skin care products. Silicone oil has many advantages such as silky touch, good spreadability, refreshing and non-greasy, good stability, and not easy to oxidize. However, there is a noteworthy impurity in skin care products and cosmetics, which is D4 (D4 is the abbreviation of cyclotetramethylsiloxane, D5, D6 and so on). D4 itself has been banned in cosmetics, but D4 is a monomer for synthesizing some silicone oils, and various organosilicon compounds are formed through ring-opening polymerization. However, in the production process of synthesizing various silicone oils, it is difficult to completely react D4 100%, so there will be D4 residues in some silicone oil products.
