Dodecamethylcyclohexasiloxane

Structural formula
General
Surname	Dodecamethylcyclohexasiloxane
other names	D 6 Cyclomethicone 6
Molecular formula	C 12 H 36 O 6 Si 6
Brief description	oily liquid
External identifiers / databases
CAS number 540-97-6 EC number 208-762-8 ECHA InfoCard 100,007,967 PubChem 10911 ChemSpider 10449 Wikidata Q27293843
properties
Molar mass	444.92 g mol −1
Physical state	liquid
density	0.98 g cm −3
Melting point	−3 ° C
boiling point	245 ° C
Vapor pressure	3 Pa (20 ° C)
solubility	practically insoluble in water (5 µg l −1 at 20 ° C)
Refractive index	1.4015
safety instructions
GHS labeling of hazardous substances no GHS pictograms H and P phrases H: no H-phrases P: no P-phrases
Authorization procedure under REACH	of particular concern : persistent, bioaccumulative and toxic ( PBT ), very persistent and very bioaccumulative ( vPvB )
Toxicological data	> 2000 mg kg −1 ( LD 50 ,  rat ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . Refractive index: Na-D line , 20 ° C

Dodecamethylcyclohexasiloxane (D ₆ ) is a chemical compound from the group of siloxanes .

properties

Dodecamethylcyclohexasiloxane is a flammable, difficult to ignite, oily liquid that is practically insoluble in water.

safety instructions

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Information on REACH status is missing

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The vapors of dodecamethylcyclohexasiloxane can form an explosive mixture with air ( flash point 91 ° C, ignition temperature 368–371 ° C).

Individual evidence

1. ↑ ^{a b c d e f g h i j k} Entry on dodecamethylcyclohexasiloxane in the GESTIS substance database of the IFA , accessed on August 20, 2020(JavaScript required) .
2. ↑ David R. Lide: CRC Handbook of Chemistry and Physics A Ready-reference Book of Chemical and Physical Data . CRC Press, 1995, ISBN 978-0-8493-0595-5 , pp. 246 ( limited preview in Google Book search).
3. ↑ Entry in the SVHC list of the European Chemicals Agency , accessed on August 21, 2020.
4. ↑ OECD: Dodecamethylcyclohexasiloxane (D6) , 20. – 22. October 2009, US / ICCA SIDS INITIAL ASSESSMENT PROFILE