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Octamethylcyclotetrasiloxane (D4)
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(CH3)8Si4O4
556-67-2
It will produce silicone high polymer from ring-opening reaction under catalyzing of acid or alkali, which is a basic material of silicone oil and silicone rubber and is also can be directly used in rubber filler treatment or a raw material for cosmetics.
Name of commodity: Octamethylcyclotetrasiloxane
CAS.NO. 556-67-2
Molecular formula: (CH3)8Si4O4
Molecular mass: 296.6
Description of danger: UN NO.1993,Package category No.Ⅲ
Product standard: Enterprise Standard Q/DYYJG1006-2007 Octamethylcyclotetrasiloxane
National Standard GB/T 20435-2006 Octamethylcyclotetrasiloxane
Performance and technical indexes
Appearance and properties: colorless transparent oily liquid.
P H Value:7 Melting Point(℃):17.5
Relative Density (Water’s =1):0.96 Boiling Point(℃):175(101.3kpa)
Relative Density(Air’s =1) : ― Pressure of Saturated Vapor(kpa):0.1(20℃)
Octanol/water distribution coefficient: 5.1
Flash Point (℃): 56 Ignition Temperature (℃): 400
Upper Limit of Explosion［％(V/V)］: 11.7 Lower Limit of Explosion［％(V/V)］:0.4
Dissolubility: insoluble in water, soluble in organic solvent such as benzene etc.
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