Cyclomethicone

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Cyclomethicone is an ingredient in cosmetic products that is used as an occlusive agent because it significantly reduces the stickiness of formulations. It consists of fully methylated cyclic dimethylpolysiloxanes such as octamethylcyclotetrasiloxane (D 4 ), decamethylcyclopentasiloxane (D 5 ) and dodecamethylcyclohexasiloxane (D 6 ), although the exact composition varies. It is practically insoluble in water, but miscible with alcohols and other solvents . It evaporates easily, even from cosmetics, without cooling or causing any discomfort. D 4 is classified as a hazardous substance due to the suspicion of toxic effects on reproduction . D 4 and D 5 are difficult to break down and accumulate in living organisms (bioaccumulate). With D 4 and D 5 there is a risk that, as a volatile substance from cosmetics, it will find its way into the human organism through inhalation. For example, a layer of D 4 evaporates on the skin at 25 ° C within 30 minutes and in 10 minutes at 37 ° C. Cyclomethicone was launched in cosmetics in 1978.

Individual evidence

  1. ↑ a b cosmacon.de: Cyclomethicone - Silicones - Dimethicone - D4 - D5 - D6 - Cosmetic Consulting , accessed on January 25, 2017.
  2. ↑ Michael Ash: Handbook of Preservatives . Synapse Info Resources, 2004, ISBN 978-1-890595-66-1 , pp. 347 ( limited preview in Google Book search).
  3. ^ Xian Jun Loh: Polymers for Personal Care Products and Cosmetics . Royal Society of Chemistry, 2016, ISBN 978-1-78262-295-6 , pp. 148 ( limited preview in Google Book search).
  4. ^ E. Desmond Goddard, James V. Gruber: Principles of Polymer Science and Technology in Cosmetics and Personal Care . CRC Press, 1999, ISBN 978-0-8247-1923-4 , pp. 283 ( limited preview in Google Book search).