CAS No.3277-26-7,1,1,3,3-Tetramethyldisiloxane Suppliers,MSDS download

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Basic Information

Molecular Structure:
CAS No.:	3277-26-7
Name:	1,1,3,3-Tetramethyldisiloxane
Article Data:	40

Formula:	C₄H₁₄OSi₂
Molecular Weight:	134.326
Synonyms:	1,1,3,3-Tetramethyl-1,3-dihydrodisiloxane;1,1,3,3-Tetramethyl-1,3-disiloxane;1,1,3,3-Tetramethyldisiloxane;1,3-Dihydrogen-1,1,3,3-tetramethyldisiloxane;1,3-Dihydrotetramethyldisiloxane;Bis(dimethylsilyl) ether;Bis(dimethylsilyl) oxide;Dimethylsilyl ether;LS7040;NSC 155369;T 2030;T 2030 (siloxane);sym-Tetramethyldisiloxane;
EINECS:	221-906-4
Density:	0.76 g/cm³
Melting Point:	<-78oC
Boiling Point:	71 °C
Flash Point:	-20 °C
Solubility:	decomposes in water
Appearance:	Colorless or yellowish transparent liquid
Hazard Symbols:	F
Risk Codes:	11-36/37/38-16
Safety:	16-26-36-9-33-29
Transport Information:	UN 2924 3/PG 2
PSA:	9.23000
LogP:	0.96980

Synthetic route

: 2401-73-2
1,1,3,3-tetramethyl-1,3-dichlorodisiloxane

: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

Conditions

Conditions	Yield
	91%

: dodecamethylcyclohexasilane

: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

Conditions

Conditions	Yield
With water In diethyl ether at 5℃; for 1.5h; Irradiation;	85%

: 1066-35-9
dimethylmonochlorosilane

: C48H120O44Si16

A: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

B: C48H168O44Si40

Conditions

Conditions	Yield
With water In tetrahydrofuran for 0.5h; Cooling with ice;	A n/a B 82%

...Expand

: 78-10-4
tetraethoxy orthosilicate

: 14857-34-2
dimethyl(ethoxy)silane

A: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

B: 17082-47-2
tetrakis(dimethylsilyloxy)silane

Conditions

Conditions	Yield
With water In benzene at 38 - 40℃; for 2h;	A 19% B 69%

...Expand

: 75-54-7
Dichloromethylsilane

: 676-58-4
methylmagnesium chloride

: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

Conditions

Conditions	Yield
und Behandeln des Reaktionsprodukts mit H2O;
und Behandeln des Reaktionsprodukts mit H2O;

: 1066-35-9
dimethylmonochlorosilane

: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

Conditions

Conditions	Yield
With water
With hydrogenchloride; water at -10 - 50℃; for 4h;

: 1066-35-9
dimethylmonochlorosilane

A: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

B: 17449-78-4
3-dimethylsilanyloxy-1,1,5,5-tetramethyl-trisiloxane

Conditions

Conditions	Yield
With trichlorosilane Hydrolysis;

: 2441-21-6
iododimethylsilane

: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

Conditions

Conditions	Yield
With water for 0.333333h; Ambient temperature;	0.185 g

: 1438-82-0
1,1,1,3,3-pentamethyl-1,3-disiloxane

A: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

B: 107-46-0
Hexamethyldisiloxane

Conditions

Conditions	Yield
KU-23 sulfonic cation exchanger at 12℃; Equilibrium constant;

: 36156-09-9
1-chloromethyl-1,1,3,3-tetramethyldisiloxane

A: 3277-26-7
1,1,3,3-Tetramethyldisiloxane

B: 2362-10-9
1,3-Bis(chloromethyl)-1,1,3,3-tetramethyldisiloxane

Conditions

Conditions	Yield
KU-23 sulfonic cation-exchanger Equilibrium constant;

Raw Materials

2401-73-2

116417-16-4

78-10-4

1438-82-0

75-54-7

676-58-4

Downstream Products

353-66-2

106-65-0

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Specification

The IUPAC name of sym-Tetramethyldisiloxane is (dimethyl-λ3-silanyl)oxy-dimethylsilicon. With the CAS registry number 3277-26-7 and EINECS 221-906-4, it is also named as 1,1,3,3-Tetramethyldisiloxane. The product's categories are Industrial / Fine Chemicals; Reduction; Si (Classes of Silicon Compounds); Si-H Compounds; Siloxanes; Si-O Compounds; Synthetic Organic Chemistry; Reducing Agents; Organometallic Reagents; Organosilicon. It is colorless or yellowish transparent liquid which is sensitive to moisture. Additionally, this chemical should be sealed in the container and stored in the well-ventilated and dry place

The other characteristics of this product can be summarized as: (1)ACD/LogP: 4.55; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 4.55; (4)ACD/LogD (pH 7.4): 4.55; (5)ACD/BCF (pH 5.5): 1689.878; (6)ACD/BCF (pH 7.4): 1689.878; (7)ACD/KOC (pH 5.5): 7113.717; (8)ACD/KOC (pH 7.4): 7113.717; (9)#H bond acceptors: 1; (10)#H bond donors: 0; (11)#Freely Rotating Bonds: 2; (12)Polar Surface Area: 9.23 Å²; (13)Enthalpy of Vaporization: 29.935 kJ/mol; (14)Vapour Pressure: 138.393 mmHg at 25°C; (15)Rotatable Bond Count: 2 ; (16)Exact Mass: 132.042668 ; (17)MonoIsotopic Mass: 132.042668 ; (18)Topological Polar Surface Area: 9.2 ; (19)Heavy Atom Count: 7 ; (20)Complexity: 39.

Preparation and Uses of sym-Tetramethyldisiloxane: It can be obtained by hydrolysis of dimethylchlorosilane. It is used in the production of additional silicone rubber, silicone gel, methyl hydrogen silicone oil, and other specialty additives.

When you are using this chemical, please be cautious about it as the following:
It is highly flammable, so people should keep it away from sources of ignition. It can be explosive when mixed with oxidizing substances. What's more, it is irritating to eyes, respiratory system and skin. In case of contacting with eyes, rinse immediately with plenty of water and seek medical advice. After using it, take precautionary measures against static discharges. If you want to contact this product, you must wear suitable protective clothing.

People can use the following data to convert to the molecule structure.
1. SMILES:C[SiH](C)O[SiH](C)C
2. InChI:InChI=1/C4H14OSi2/c1-6(2)5-7(3)4/h6-7H,1-4H3
3. InChIKey:NVYQDQZEMGUESH-UHFFFAOYAY

The following are the toxicity data which has been tested.

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
mouse	LC50	inhalation	400gm/m³/2H (400000mg/m³)		"Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1221, 1986.
mouse	LD50	oral	3gm/kg (3000mg/kg)		"Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1221, 1986.

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