Dimethicone

Also known as: Polydimethylsiloxane, PDMS, Dimethyl silicone oil, Dimethylpolysiloxane, dimethicone macromolecule

Dimethicone (CAS 9006-65-9) is a compound in the Aliphatic Hydrocarbons category listed in the Jingsj chemical database. It has the molecular formula C6H18OSi2 and a molecular weight of 162.37800 g/mol. Key properties include a density of 1 g/mL at 20 °C and a flash point of 121 °C. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 9006-65-9
Jingsj CID: J-1962759-9
Molecular Formula: C₆H₁₈OSi₂
Molecular Weight: 162.37800 g/mol
Category: Aliphatic Hydrocarbons
Last updated: 8/21/2026

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Physicochemical Properties

Density	1 g/mL at 20 °C
Flash Point	121 °C
Exact Mass	162.09000
PSA	9.23000
LogP	2.67280
Vapor Pressure	5 mm Hg ( 20 °C)
Refractive Index	n20/D 1.406
Storage Conditions	2~8°C
Stability	Stable. Combustible. Incompatible with strong oxidizing agents, reducing agents, organics, acids, alkalis. Corrodes many metals.
Additional Property	Practically insoluble in water, very slightly soluble or practically insoluble in anhydrous ethanol, miscible with ethyl acetate, with methyl ethyl ketone and with toluene.

Activity & Biological Data

Additional Information	[1]. Nair B, et al. Final report on the safety assessment of stearoxy dimethicone, dimethicone, methicone, amino bispropyl dimethicone, aminopropyl dimethicone, amodimethicone, amodimethicone hydroxystearate, behenoxy dimethicone, C24-28 alkyl methicone, C30-45 alkyl methicone, C30-45 alkyl dimethicone, cetearyl methicone, cetyl dimethicone, dimethoxysilyl ethylenediaminopropyl dimethicone, hexyl methicone, hydroxypropyldimethicone, stearamidopropyl dimethicone, stearyl dimethicone, stearyl methicone, and vinyldimethicone. Int J Toxicol. 2003;22 Suppl 2:11-35. [2]. Ihde ES, et al. Safety and efficacy of a 100% dimethicone pediculocide in school-age children. BMC Pediatr. 2015 Jun 20;15:70. [3]. Shank P D, et al. Safety Assessment of Dimethicone, Methicone, and Substituted-Methicone Polymers, as Used in Cosmetics[J]. 2020.

Additional Information

[1]. Nair B, et al. Final report on the safety assessment of stearoxy dimethicone, dimethicone, methicone, amino bispropyl dimethicone, aminopropyl dimethicone, amodimethicone, amodimethicone hydroxystearate, behenoxy dimethicone, C24-28 alkyl methicone, C30-45 alkyl methicone, C30-45 alkyl dimethicone, cetearyl methicone, cetyl dimethicone, dimethoxysilyl ethylenediaminopropyl dimethicone, hexyl methicone, hydroxypropyldimethicone, stearamidopropyl dimethicone, stearyl dimethicone, stearyl methicone, and vinyldimethicone. Int J Toxicol. 2003;22 Suppl 2:11-35. [2]. Ihde ES, et al. Safety and efficacy of a 100% dimethicone pediculocide in school-age children. BMC Pediatr. 2015 Jun 20;15:70. [3]. Shank P D, et al. Safety Assessment of Dimethicone, Methicone, and Substituted-Methicone Polymers, as Used in Cosmetics[J]. 2020.

Frequently Asked Questions

What is the CAS number of Dimethicone?

The CAS number of Dimethicone is 9006-65-9.

What are the molecular formula and molecular weight of Dimethicone?

Dimethicone has molecular formula C6H18OSi2 and molecular weight 162.37800 g/mol.

Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Dimethicone (CAS 9006-65-9)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1962759-9 (accessed 2026-11-06).

Data for reference only; verify product details with suppliers before purchase.