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Octamethylcyclotetrasiloxane

Octamethylcyclotetrasiloxane / CAS : 556-67-2

Appearance Colorless Transparent Liquid UN 1993
HS 29319000 DG Class 3
Synonyms Cyclotetrasiloxane, Octamethyl-; 2,2,4,4,6,6,8,8-Octamethyl-1,3,5,7,2,4,6,8-Tetraoxatetrasilocane; Jacs-556-67-2; Unioncarbide7207; Dimethylcyclosiloxane; 1H-Benzimidazol-2-Yl-Carbamic Acid Methyl Ester-D4; 2-Benzimidazolecarbamic Acid Methyl Ester-D4; Octamethylcyclotetrap
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Properties

Summary

Formula
C8H24O4Si4
Molecular Mass
296.61600
Exact Mass
296.07500
PSA
36.92000
Logp
2.87360
IUPAC
2,2,4,4,6,6,8,8-octamethyl-1,3,5,7,2,4,6,8-tetraoxatetrasilocane
SMILES
C[Si]1(O[Si](O[Si](O[Si](O1)(C)C)(C)C)(C)C)C

Attribute classification

Matter Classification
organic
Category
API & Intermediate > Pharmaceutical Intermediates
Polymers Material > Rubber Raw Materials And Products

Chemical and Physical Properties

Melting Point
17-18 °C(lit.)
Density
0.956 g/mL at 25 °C(lit.)
Boiling Point
175-176 °C(lit.)
Flash Point
140 °F
Appearance
Colorless Transparent Liquid

Export information

HS Code
29319000
Export Rebate
13%
UN No.
1993
DG-Class
3
Risk Code
53-62-10
Safety Label
Xn

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