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Octamethylcyclotetrasiloxane, also called D4, is an organosilicon compound with the formula [(CH3)2SiO]4. lt is a colorless viscous liquid. It is a common cyclomethicone. Like other cyclomethicones, it is slightly volatile. It has attracted scrutiny because it is pervasive in the environment.

Product Details:    

Name: octamethylcyclotetrasiloxane

Synonyms:

Octamethylcyclotetrasiloxane;

Cyclotetrasiloxane, octamethyl-;

2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane;

CAS: 556-67-2

EINECS: 209-136-7

MF: C8H24O4Si4

MW: 296.61600

MP: 17-18 °C(lit.)

BP: 175-176 °C(lit.)

FP: 140 °F

Purity: 95%min

Density: 0.956 g/mL at 25 °C(lit.)

Refractive index: n20/D 1.396(lit.)

Storage Condition: 2-8?C

Appearance: colorless clear liquid

Stability: Stability Stable, but light sensitive. Incompatible with strong reducing agents.

Package: 5g, 25g, 100g, 500g, 1kg, 25kg

Application: As a raw material for organic silicon, also used in the electronics industry.

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