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体彩20选5第12255期:1,1,3,3-Tetramethyldisiloxane

1,1,3,3-Tetramethyldisiloxane
1,1,3,3-Tetramethyldisiloxane structure
CAS No.
3277-26-7
Chemical Name:
1,1,3,3-Tetramethyldisiloxane
Synonyms
CT2030;(Me2HSi)2O;SILOXANE HSI2;dimethylsilylether;Dimethylsilyl ether;(CH3)2HSiOSiH(CH3)2;Tetramethyldisiloxan;1,1,3,3-Tetramethyld;TETRAMETHYLDISILOXANE;bis(dimethylsilyl)oxide
CBNumber:
CB5355451
Molecular Formula:
C4H14OSi2
Formula Weight:
134.32
MOL File:
3277-26-7.mol

1,1,3,3-Tetramethyldisiloxane Properties

Melting point:
<-78°C
Boiling point:
70-71 °C(lit.)
Density 
0.76 g/mL at 25 °C(lit.)
vapor pressure 
250 hPa (20 °C)
refractive index 
n20/D 1.370(lit.)
Flash point:
14 °F
storage temp. 
2-8°C
form 
liquid
color 
colorless
Specific Gravity
0.757
explosive limit
0.8-62.9%(V)
Water Solubility 
DECOMPOSES
Sensitive 
Moisture Sensitive
BRN 
1733364
InChIKey
NVYQDQZEMGUESH-UHFFFAOYSA-N
CAS DataBase Reference
3277-26-7(CAS DataBase Reference)
NIST Chemistry Reference
((CH3)2SiH)2O(3277-26-7)
EPA Substance Registry System
Disiloxane, 1,1,3,3-tetramethyl-(3277-26-7)
SAFETY
  • Risk and Safety Statements
  • Hazard and Precautionary Statements (GHS)
Hazard Codes  F
Risk Statements  11-36/37/38-16
Safety Statements  16-26-36-9-33-29
RIDADR  UN 2924 3/PG 2
WGK Germany  3
RTECS  JN1000000
10-21
Autoignition Temperature 240 °C
TSCA  Yes
HazardClass  3
PackingGroup  II
HS Code  29310095
Symbol(GHS):
Signal word: Danger
Hazard statements:
Code Hazard statements Hazard class Category Signal word Pictogram P-Codes
H225 Highly Flammable liquid and vapour Flammable liquids Category 2 Danger P210,P233, P240, P241, P242, P243,P280, P303+ P361+P353, P370+P378,P403+P235, P501
Precautionary statements:
P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P243 Take precautionary measures against static discharge.
P370+P378 In case of fire: Use … for extinction.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.
P403+P235 Store in a well-ventilated place. Keep cool.

1,1,3,3-Tetramethyldisiloxane price More Price(10)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 235733 1,1,3,3-Tetramethyldisiloxane 97% 3277-26-7 25g $25.8 2018-11-13 Buy
Sigma-Aldrich 235733 1,1,3,3-Tetramethyldisiloxane 97% 3277-26-7 100g $78.4 2018-11-13 Buy
TCI Chemical T1437 1,1,3,3-Tetramethyldisiloxane >97.0%(GC) 3277-26-7 25mL $21 2018-11-22 Buy
TCI Chemical T1437 1,1,3,3-Tetramethyldisiloxane >97.0%(GC) 3277-26-7 250mL $126 2018-11-22 Buy
Alfa Aesar B23697 1,1,3,3-Tetramethyldisiloxane, 97% 3277-26-7 100g $99.9 2018-11-13 Buy

1,1,3,3-Tetramethyldisiloxane Chemical Properties,Uses,Production

Description

1,1,3,3-Tetramethyldisiloxane is soluble in many organic solvents, such as aromatic hydrocarbon and petroleum hydrocarbons, and so on. This product is a kind of widely used organic silicon intermediates, and usually be used as organic silicon blocking agent. Due to containing reactive Si-H groups in the molecular structure, it can be used in the synthesis of copolymer macromolecule by hydrosilylation. The synthesis of copolymer macromolecule can be made into a series of reactive silicone oil.

Chemical Properties

Colorless or yellowish transparent liquid

Uses

1. Synthesis of polysiloxane containing faculties end groups.
2. Can be used for the preparation of high performance organic silicone surfactants.
3. Applicable to the production of many products, such as addition silicon rubber, silica gel, Hydrogenpolysiloxane and plastic, resin modifier, dendrite polymer special additives, etc.

Uses

1, 1, 3, 3-Tetramethyldisiloxane is a kind of siloxane derivative, and can be used as a monomer for the preparation of silicone polymers or silicone resins. It is used as an intermediate for preparing other organosilicon compounds. It is also used in non-aqueous polymer preparation as well as a laboratory reagent. In organic synthesis, it finds an application as an effective reducing agent in platinum-catalyzed reduction of carboxamides to amines as well as in the Au/TiO2-catalyzed hydrosilylation of carbonyl compounds (e.g., reduction of aldehydes or ketones) relative to monohydrosilanes. It can also enable a direct bromination of carboxylic acids in the presence of indium bromide (InBr3) as catalyst.

Purification Methods

1,Possible impurity is 1,1,5,5-tetramethyl-3-trimethylsiloxytrisiloxane b 154-155o/733mm. Fractionate it, collect fractions boiling below 80o and re-fractionate it. Its purity can be analysed by alkaline hydrolysis and measuring the volume of H2 liberated followed by gravimetric estimation of silica in the hydrolysate. It is unchanged when stored in glass containers in the absence of moisture for 2-3 weeks. Small amounts of H2 are liberated on long storage. Care should be taken when opening a container due to pressure developed. [Speier et al. J Am Chem Soc 79 974 1958, Emeléus & Smythe J Chem Soc 609 1958, IR: Kriegsmann Z Anorg Chem 299 78 1959, Beilstein 4 IV 3991.]

References

https://www.alfa.com/en/catalog/B23697/
//www.organic-chemistry.org/chemicals/reductions/tetramethyldisiloxane-TMDSO.shtm
https://www.infona.pl/resource/bwmeta1.element.elsevier-722236cc-df38-37aa-bbed-029ec07d525f

1,1,3,3-Tetramethyldisiloxane Preparation Products And Raw materials

Raw materials

Preparation Products


1,1,3,3-Tetramethyldisiloxane Suppliers

Global( 225)Suppliers
Supplier Tel Fax Email Country ProdList Advantage
Jiangxi New jiayi New Materials Co., Ltd.
15988280056
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86-25-84522992
86-25-84774616 or 1617 [email protected] CHINA 60 58
Capot Chemical Co.,Ltd.
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+86-371-55531817
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View Lastest Price from 1,1,3,3-Tetramethyldisiloxane manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2019-07-16 TMDSO 1,1,3,3-Tetramethyldisiloxane
3277-26-7
US $15.50 / KG 1KG 99.50% in stock CAS 3277-26-7 36 MT per month Chemwill Asia Co.,Ltd.
2019-07-16 1,1,3,3-Tetramethyldisiloxane
3277-26-7
US $22.50 / KG 1KG 99.50% in stock CAS 3277-26-7 36 MT per month Chemwill Asia Co.,Ltd.
2019-07-16 1,1,3,3-Tetramethyldisiloxane 3277-26-7 TMDSO
3277-26-7
US $19.50 / KG 1KG 99.50% in stock CAS 3277-26-7 36 MT per month Chemwill Asia Co.,Ltd.

1,1,3,3-Tetramethyldisiloxane Spectrum


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