Decamethylcyclopentasiloxane

Catalog Number	ACM541026-4
CAS Number	541-02-6
Structure
Description	Decamethylcyclopentasiloxane (D5) is an organosilicon compound with the formula [(CH3)2SiO]5. It is a colorless and odorless liquid that is slightly volatile. The compound is classified as a cyclomethicone. Such fluids are commonly used in cosmetics, such as deodorants, sunblocks, hair sprays and skin care products. It is becoming more common in hair conditioners, as it makes the hair easier to brush without breakage. It is also used as part of silicone based personal lubricants. D5 is considered an emollient. In Canada, among the volume used in consumer products approximately 70% were for antiperspirants and 20% for hair care products.
Synonyms	2,2,4,4,6,6,8,8,10,10-Decamethyl-1,3,5,7,9,2,4,6,8,10-Pentoxapentasilecane
IUPAC Name	Decamethylcyclopentasiloxane
Molecular Weight	370.77 g/mol
Molecular Formula	C10H30O5Si5
Canonical SMILES	C[Si]1(O[Si](O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)(C)C)C
Boiling Point	210°C(lit.) at 760 mmHg
Melting Point	-38°C
Flash Point	76 °C
Purity	≥96%
Density	0.96 g/mL at 25°C
Solubility	Insoluble in water.
Appearance	Liquid
Application	Decamethylcyclopentasiloxane is a cyclic volatile methylsiloxane
Storage	Store at room temperature.
Chemical Formula	C10H30O5Si5
EC Number	208-764-9
Exact Mass	370.09400
HS Code	29310095
MDL Number	MFCD00046966
Physical State	Liquid
Reaxys Registry Number	1800166
Refractive Index	n20D 1.40
RTECS	GY5945200
Specific Gravity	0.96
WGK Germany	2