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1,1,1,3,5,5,5-Heptamethyltrisiloxane

Name: 1,1,1,3,5,5,5-Heptamethyltrisiloxane
SKU: ACM1873887

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Catalog NumberACM1873887

CAS Number1873-88-7

CategorySalt

Synonyms

Methylbis(trimethylsilyloxy)silane

Description

Liquid

Molecular Weight

222.51

Molecular Formula

C7H22O2Si3

Canonical SMILES

C[Si](O[Si](C)(C)C)O[Si](C)(C)C

InChI

InChI=1S/C7H21O2Si3/c1-10(8-11(2,3)4)9-12(5,6)7/h1-7H3

InChI Key

SWGZAKPJNWCPRY-UHFFFAOYSA-N

Boiling Point

142 °C

Melting Point

<0 °C

Flash Point

82 °C

Purity

98%

Density

0.819 g/mL

Appearance

Colorless to almost colorless clear liquid

Application

1,1,1,3,5,5,5-Heptamethyltrisiloxane is a versatile colourless liquid primarily employed in the aromatic C-H silylation of arenes when used with a platinum complex catalyst. Additionally, it serves as a key reagent in the synthesis of various compounds, such as 3-Octyl-1,1,1,3,5,5,5-heptamethyltrisiloxane, which is utilized as an agricultural adjuvant and improves sensory performance in cosmetic formulations. Beyond this, it facilitates the creation of isoindigo-based conjugated polymers with siloxane-terminated solubilizing groups, monosiloxy esters with different acids, and bis(trimethylsiloxy)methylsilane, an essential raw material and intermediate in organic synthesis, pharmaceuticals, and dyestuffs. Furthermore, it is employed in the silylation of aryl iodides, highlighting its broad applicability and importance in various chemical processes.

Storage

Store under inert gas

Complexity

121

Covalently-Bonded Unit Count

EC Number

217-496-1

Exact Mass

221.084935g/mol

Formal Charge

Hazard Statements

H315 : Causes skin irritation.
H319 : Causes serious eye irritation.
H225 : Highly flammable liquid and vapour.

Heavy Atom Count

MDL Number

MFCD00048000

Monoisotopic Mass

221.084935g/mol

Packaging

5 g

Precautionary Statements

P210 : Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
P233 : Keep container tightly closed.
P264 : Wash skin thoroughly after handling.
P280 : Wear protective gloves/ protective clothing/ eye protection/ face protection.
P370 + P378 : In case of fire: Use dry sand, dry chemical or alcohol-resistant foam to extinguish.
P303 + P361 + P353 : IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water.

Properties

Liquid

Refractive Index

1.382

Rotatable Bond Count

Signal Word

Danger

Specific Gravity

0.82

UNII

RVY9659R8C

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