Is Cyclotetrasiloxane harmful?
Cyclotetrasiloxane (D4) is toxic to human reproduction system and it accumulates in the environment with unpredictable long-term effects. Cyclopentasiloxane (D5) can also be harmful to the environment.
What is Cyclotetrasiloxane in skin care?
Cyclotetrasiloxane is a type of silicone that is most often utilized for contributing emollience to a formula and delivering a skin-softening effect.
What does cyclopentasiloxane mean?
What is cyclopentasiloxane? Cyclopentasiloxane is a silicone regularly used in cosmetic products. It’s commonly found in medical implants, sealants, lubricants, and windshield coatings. D5 is colorless, odorless, non-greasy, and water-thin. It doesn’t get absorbed into the skin.
What is the structure of cyclotetrasiloxane?
The cyclotetrasiloxane 1,1,5,5-tetraphenyl-3,3,7,7-tetrahydroxycy-clotetrasiloxane forms a stable complex with two pyridine molecules trans to each other across the siloxane ring (316). M. Unno, R. Tanaka, in Efficient Methods for Preparing Silicon Compounds, 2016
What is octamethylcyclotetrasiloxane?
Octamethylcyclotetrasiloxane is a cyclosiloxane that is the octamethyl derivative of cyclotetrasiloxane. It is an organosilicon compound and a cyclosiloxane. It derives from a hydride of a cyclotetrasiloxane. 2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane Computed by Lexichem TK 2.7.0 (PubChem release 2021.05.07)
What is the Henry’s Law constant for octamethylcyclotetrasiloxane?
6.74 (LogP) log Kow = 6.74 (average of 3 measurements) 12.00 atm-m3/mole Henry’s Law constant = 13.4 atm-cu m/mol at 25 °C 1.01e-12 cm3/molecule*sec Stable under recommended storage conditions. Sigma-Aldrich; Safety Data Sheet for Octamethylcyclotetrasiloxane. Product Number: 235695, Version 3.14 (Revision Date 02/28/2015).
What is the CAS number for octamethylcyclotetrasiloxane D4?
Chemical Safety Report – Octamethylcyclotetrasiloxane, D4 Name: Octamethylcyclotetrasiloxane CAS Number: 556-67-2 Peter Fisk Associates Ltd. Toxicol. Sci., 72 ( 2003), pp. 3 – 18 Toxicol. Sci., 99 ( 2007), pp. 422 – 431 Scientific Committee on Consumer Safety European Commission. Directorate-General for Health & Consumers ( 2005) Toxicol.
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