- Decamethylcyclopentasiloxane
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Decamethylcyclopentasiloxane 
Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecaneOther namesCyclopentamethicone
D5 Cyclic pentamer
2,2,4,4,6,6,8,8,10,10-DecamethylcyclopentasiloxaneIdentifiers CAS number 541-02-6 
PubChem 10913 ChemSpider 10451 UNII 0THT5PCI0R EC number 208-764-9 MeSH Decamethylcyclopentasiloxane RTECS number GY5945200 Beilstein Reference 1800166 Jmol-3D images Image 1
Image 2- C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1
O1[Si](O[Si](O[Si](O[Si](O[Si]1(C)C)(C)C)(C)C)(C)C)(C)C
- 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
Key: XMSXQFUHVRWGNA-UHFFFAOYSA-N
InChI=1/C10H30O5Si5/c1-16(2)11-17(3,4)13-19(7,8)15-20(9,10)14-18(5,6)12-16/h1-10H3
Key: XMSXQFUHVRWGNA-UHFFFAOYAC
Properties Molecular formula C10H30O5Si5 Molar mass 370.77 g mol−1 Exact mass 370.093956735 g mol-1 Appearance Colourless liquid Density 0.958 g cm-3 Melting point -47 °C, 226 K, -53 °F
Boiling point 210 °C, 483 K, 410 °F
Viscosity 3.74 cP Hazards MSDS External MSDS EU classification 
XiR-phrases R36/37/38 S-phrases S23, S24/25 NFPA 704 
210Flash point 73 °C Related compounds Related Organosilicon compounds tetramethylsilane, silabenzene 
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)Infobox references Decamethylcyclopentasiloxane (D5) is a silicone fluid 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. It can be found in other cosmetics such as sunless tanning lotion and underarm deodorants. D5 is an emollient.
D5 is contained in the mixture cyclomethicone (INCI name).
See also
External links
This article about an organic compound is a stub. You can help Wikipedia by expanding it. - C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1
