ChemicalBook Product Catalog Organic Chemistry Hydrocarbons and derivatives Cyclic hydrocarbons Decamethylcyclopentasiloxane

Decamethylcyclopentasiloxane

Product NameDecamethylcyclopentasiloxane
CAS541-02-6
MFC10H30O5Si5
MW370.77
EINECS208-764-9
MOL File541-02-6.mol

Chemical Properties

Melting point	-44°C
Boiling point	90 °C/10 mmHg (lit.)
Density	0.958 g/mL at 25 °C (lit.)
vapor pressure	33.2Pa at 25℃
refractive index	n20/D 1.396(lit.)
Flash point	162 °F
storage temp.	2-8°C
solubility	<0.0001g/l (calculated)
form	Liquid
color	Colorless
Specific Gravity	0.959
explosive limit	0.52-7%(V)
Water Solubility	Immiscible with water.
Hydrolytic Sensitivity	1: no significant reaction with aqueous systems
Merck	14,2848
BRN	1800166
Henry's Law Constant	2.8×10^-7 mol/(m³Pa) at 25℃, Xu and Kropscott (2014)
Dielectric constant	2.5(20℃)
Stability	Stable. Incompatible with strong oxidizing agents.
Major Application	cleaning products cosmetics environmental food and beverages personal care
Cosmetics Ingredients Functions	SKIN CONDITIONING - EMOLLIENT SOLVENT HAIR CONDITIONING SKIN CONDITIONING
Cosmetic Ingredient Review (CIR)	Decamethylcyclopentasiloxane (541-02-6)
InChI	1S/C10H30O5Si5/c1-16(2)11-17(3,4)13-19(7,8)15-20(9,10)14-18(5,6)12-16/h1-10H3
InChIKey	XMSXQFUHVRWGNA-UHFFFAOYSA-N
SMILES	C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1
LogP	8.07 at 24.6℃
Surface tension	18.29 mN/m at 297.15K
CAS DataBase Reference	541-02-6(CAS DataBase Reference)
NIST Chemistry Reference	Decamethylcyclopentasiloxane(541-02-6)
EPA Substance Registry System	Decamethylcyclopentasiloxane (541-02-6)

Safety Information

Hazard Codes	Xi
Risk Statements	36/37/38-53
Safety Statements	23-24/25-36-26
RIDADR	NA 1993 / PGIII
WGK Germany	2
RTECS	GY5945200
TSCA	TSCA listed
HS Code	29310095
Storage Class	10 - Combustible liquids
Hazardous Substances Data	541-02-6(Hazardous Substances Data)
Toxicity	LD50 oral in rat: > 24134mg/kg

MSDS

Provider	Language
2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-pentoxapentasilecane	English
SigmaAldrich	English
ALFA	English

Usage And Synthesis

Chemical Properties

liquid

Uses

cyclopentasiloxane is incorporated into a formulation for its emollient and solvent activity.

Uses

A cyclic volatile methylsiloxane (cVMS) used in cosmetic and personal care products. Used in dermal exposure and inhalation toxicity study.

Uses

Octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane are major industrial products, which are either marketed as such or used for the production of polydimethylsiloxanes.

Uses

Intermediate in the manufacture of high mol wt siloxane polymers. Carrier ingredient in personal care products; dry cleaning solvent.

Definition

ChEBI: Decamethylcyclopentasiloxane is an organosilicon compound.

General Description

D5 Cyclomethicone is a cyclic siloxane, that has a silicon-oxygen bond in a cyclic arrangement and methyl groups attached with the silicon atom. It is used in the production of some silicon-based polymers that are widely used in various personal care products.
Pharmaceutical secondary standards for application in quality control, provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards.

Flammability and Explosibility

Non flammable

Toxics Screening Level

The initial threshold screening level (ITSL) for decamethylcyclopentasiloxane is 200 μg/m3, with annual averaging time.