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Octamethyltrisiloxane

CAS No.107-51-7
Chemical Name:Octamethyltrisiloxane
CBNumber:CB3236712
Molecular Formula:C8H24O2Si3
Formula Weight:236.53
MOL File:107-51-7.mol

Octamethyltrisiloxane Property

Melting point -82 °C (lit.)
Boiling point 153 °C (lit.)
Density 0.82 g/mL at 25 °C (lit.)
vapor density >1 (vs air)
vapor pressure 5.3hPa at 25℃
refractive index n20/D 1.384(lit.)
Flash point 99 °F
storage temp. Inert atmosphere,Room Temperature
solubility Chloroform (Slightly), DMSO, Methanol (Slightly)
form liquid
Specific Gravity 0.82
color Colourless to Pale Yellow
Viscosity 0.842mm2/s
Water Solubility 34μg/L at 23℃
Hydrolytic Sensitivity 1: no significant reaction with aqueous systems
Merck 14,6748
BRN 1753063
Dielectric constant 2.3（20℃）
Stability Hygroscopic
LogP 6.6 at 25.3℃
CAS DataBase Reference 107-51-7(CAS DataBase Reference)
EWG's Food Scores 2
FDA UNII 9G1ZW13R0G
EPA Substance Registry System Trisiloxane, octamethyl- (107-51-7)
UNSPSC Code 12352103
NACRES NA.23

Safety

Risk Statements :10
Safety Statements :23-24/25
RIDADR :UN 1993 3/PG 3
WGK Germany :3
F :10-21
TSCA :Yes
HazardClass :3.2
PackingGroup :III
HS Code :29319090

NFPA 704:

	2
2		0

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordWarning
Hazard statements H226
Precautionary statements P210-P233-P240-P241-P242-P243

Octamethyltrisiloxane Price More Price(5)

Brand: Sigma-Aldrich(India)
Product number: 235709
Product name : Octamethyltrisiloxane
Purity: 98%
Packaging: 5ML
Price: ₹3031
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 469319
Product name : Poly(dimethylsiloxane)
Purity: viscosity 1.0?cSt?(25?°C)
Packaging: 50ML
Price: ₹12015.75
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 235709
Product name : Octamethyltrisiloxane
Purity: 98%
Packaging: 100ML
Price: ₹8584.23
Updated: 2022/06/14
Buy: Buy

Brand: TCI Chemicals (India)
Product number: O0257
Product name : Octamethyltrisiloxane
Purity: min. 98.0 %
Packaging: 25ML
Price: ₹3400
Updated: 2022/05/26
Buy: Buy

Brand: TCI Chemicals (India)
Product number: O0257
Product name : Octamethyltrisiloxane
Purity: min. 98.0 %
Packaging: 100ML
Price: ₹9400
Updated: 2022/05/26
Buy: Buy

Octamethyltrisiloxane Chemical Properties,Usage,Production

Chemical Properties Octamethyltrisiloxane is clear colourless liquid.
Application As a basis for silicone oils or fluids designed to withstand extremes of temp; as a foam suppressant in petroleum lubricating oil.
Uses Octamethyltrisiloxane is a linear silicone oligomer. It is used as an excipient Dimethicones in pharmaceutical and cosmetic applications can provide long lasting lubricant, smooth feel and spreads easily. Studies demonstrate that it is able to maintain the conformational stability of certain adsorbed proteins such as bovine serum albumin (BSA). Used in the methylation of mercury(II) salts.
Definition ChEBI: Octamethyltrisiloxane is an organosiloxane that is trisiloxane in which all the hydrogens have been replaced by methyl groups.
General Description Poly(dimethylsiloxane) (PDMS), also known as dimethicone, is an organosilicon compound that is widely used as a siloxane based elastomer. It is a hydrophobic material with attractive physical and chemical properties such as elasticity, optical transparency, tunable surface chemistry, and low electrical conductivity.
Flammability and Explosibility Flammable
Purification Methods Distil it twice, the middle fraction from the first distillation is again distilled, and the middle fraction of the second distillation is used. [Patnode & Wilcock J Am Chem Soc 68 358, Wolcock J Am Chem Soc 68 691 1946, Thompson J Chem Soc 1908 1953, Beilstein 4 IV 4115.]
Toxics Screening Level The initial threshold screening level (ITSL) for octamethyltrisiloxane (CASRN 107-51-7) remains at 0.1 μg/m 3 based on an annual averaging time.