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Dimethicone

Dimethylpolysiloxane

Dimethicone
Dimethicone is a polydimethylsiloxane obtained by hydrolysis and polycondensation of dichlorodimethyl silane and chlorotrimethylsilane. The degree of polymerization (n = 20–400) is such that materials with kinematic viscosities nominally 20–1300 mm²/s (20–1300 cSt) are produced.
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Dimethicone
Dimethicone
Primary function
Emollient
Typical use level
O/W emulsion: 0.5 - 5.0% Creams, lotions, ointments: 10 - 30%
Physical data

  • Acid value < 0.01
  • Density 0.94–0.98 g/cm³ at 25°C
  • Refractive index n D25 = 1.401–1.405
  • Surface tension 20.5–21.2 mN/m at 25°C

Benefits / Claims
Emollient in pharmaceutical topical formulations
Antifoaming agent in O/W emulsion
Dimethicone is hydrophobic and is also widely used in topical barrier preparations
Suitable for

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