CAS No.15721-05-8,HEPTAMETHYL CYCLOTETRASILOXANE Suppliers

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Basic Information

Molecular Structure:
CAS No.:	15721-05-8
Name:	HEPTAMETHYL CYCLOTETRASILOXANE
Article Data:	1

Formula:	C₇H₂₂O₄Si₄
Molecular Weight:	282.591
Synonyms:	1,3,3,5,5,7,7-Heptamethylcyclotetrasiloxane;Heptamethylcyclotetrasiloxane;Cyclotetrasiloxane,heptamethyl- (6CI,7CI,8CI,9CI);
Density:	0,958 g/cm3
Melting Point:	-27 °C
Boiling Point:	174.3 °C at 760 mmHg
Flash Point:	59.2 °C
Hazard Symbols:	R10:;
Risk Codes:	10
Safety:	16
PSA:	36.92000
LogP:	2.02210

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Specification

The Cyclotetrasiloxane,2,2,4,4,6,6,8-heptamethyl- is an organic compound with the formula C₇H₂₂O₄Si₄. The systematic name of this chemical is 2,2,4,4,6,6,8-Heptamethyl-1,3,5,7,2,4,6,8-tetroxatetrasilocane. With the CAS registry number 15721-05-8, it is also named as Heptamethyl cyclotetrasiloxane. Besides, its molecular weight is 282.59.

Physical properties about Cyclotetrasiloxane,2,2,4,4,6,6,8-heptamethyl- are: (1)#H bond acceptors: 4; (2)Polar Surface Area: 36.92 Å²; (3)Flash Point: 59.2 °C; (4)Enthalpy of Vaporization: 39.38 kJ/mol; (5)Boiling Point: 174.3 °C at 760 mmHg; (6)Vapour Pressure: 1.62 mmHg at 25 °C.

Preparation: this chemical can be prepared by Dichloro-dimethyl-silane. This reaction is a kind of Cyclization. This reaction will need solvents diethyl ether; H₂O. The reaction time is 1 hour with reaction temperature of 0 - 5 °C. The yield is about 60%.

Uses of Cyclotetrasiloxane,2,2,4,4,6,6,8-heptamethyl-: it can be used to produce Chloro-heptamethyl-cyclotetrasiloxane at temperature of 4 - 5 °C. This reaction is a kind of Chlorination. It will need reagent Cl₂ and solvent CCl₄. The yield is about 96%.

When you are using this chemical, please be cautious about it as the following:
It is flammable. When you are using it, keep away from sources of ignition - No smoking.

You can still convert the following datas into molecular structure:
(1)InChI: InChI=1/C7H22O4Si4/c1-12-8-13(2,3)10-15(6,7)11-14(4,5)9-12/h12H,1-7H3
(2)InChIKey: CLTMUXYRYKDGOK-UHFFFAOYAE
(3)Std. InChI: InChI=1S/C7H22O4Si4/c1-12-8-13(2,3)10-15(6,7)11-14(4,5)9-12/h12H,1-7H3
(4)Std. InChIKey: CLTMUXYRYKDGOK-UHFFFAOYSA-N

The toxicity data is as follows:

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
mouse	LDLo	oral	3gm/kg (3000mg/kg)		"Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1228, 1986.