Decamethylcyclopentasiloxane

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Decamethylcyclopentasiloxane
Skeletal formula of decamethylcyclopentasiloxane
Names
IUPAC name
Decamethyl-1,3,5,7,9,2,4,6,8,10-pentaoxapentasilecane
Other names
Cyclopentamethicone

Cyclic dimethylsiloxane pentamer
D5

2,2,4,4,6,6,8,8,10,10-Decamethylcyclopentasiloxane
Identifiers
1800166
541-02-6 YesY
ChemSpider 10451 YesY
EC number 208-764-9
Jmol-3D images Image
Image
MeSH Decamethylcyclopentasiloxane
PubChem 10913
RTECS number GY5945200
UNII 0THT5PCI0R YesY
Properties
C10H30O5Si5
Molar mass 370.77 g·mol−1
Appearance Colourless liquid
Density 0.958 g cm−3
Melting point −47 °C; −53 °F; 226 K
Boiling point 210 °C (410 °F; 483 K)
Viscosity 3.74 cP
Hazards
MSDS External MSDS
EU classification Irritant Xi
R-phrases R36/37/38
S-phrases S23, S24/25
NFPA 704
Flammability code 2: Must be moderately heated or exposed to relatively high ambient temperature before ignition can occur. Flash point between 38 and 93 °C (100 and 200 °F). E.g., diesel fuel Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point 73 °C (163 °F; 346 K)
Related compounds
tetramethylsilane, silabenzene
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Decamethylcyclopentasiloxane (D5) is a cyclomethicone 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. D5 is considered an emollient.


See also[edit]

External links[edit]

  • Record in the Household Products Database of NLM