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Hexamethyl Disiloxane

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Hexamethyl Disiloxane Specification

Particle Size
Not applicable (liquid form)

Moisture (%)
0.01%

Residue on Ignition
0.01%

Molecular Formula
C6H18OSi2

Heavy Metal (%)
0.001%

EINECS No
203-492-7

Melting Point
-59 C

Ph Level
Neutral

Acid Value
<0.01 mg KOH/g

Boiling point
101 C

Viscosity
~0.65 mPas at 25C

Molecular Weight
162.38 g/mol

HS Code
29319090

Place of Origin
China

Assay
>99.0%

Storage
Store in a cool, dry, and well-ventilated area. Keep containers tightly closed.

Loss on Drying
Not applicable (volatile liquid)

Other Names
HMDSO; 1,1,1,3,3,3-Hexamethyldisiloxane

CAS No
107-46-0

Type
Siloxane Compound

Grade
Industrial / Electronic

Usage
Intermediate in organic synthesis; hydrophobic agent; semiconductor processing

Purity
>99%

Appearance
Clear liquid

Application
Used as an intermediate for silicone polymers, coating agents, water repellents, microelectronic manufacturing, and pharmaceutical synthesis.

Raw Material
Silicon-based chemicals

Smell
Faint ether-like odor

Color
Colorless

Form
Liquid

NFPA Ratings
Health: 1, Flammability: 3, Instability: 0

Refractive Index (n20/D)
1.375-1.378

Auto-ignition Temperature
234C

Packaging
ISO tank, drum, or custom packaging upon request

Odor Threshold
Not determined

Transport Information
UN 1162, Hexamethyldisiloxane, Class 3, Packing Group II

Shelf Life
24 months (when properly stored in sealed container)

Solubility
Insoluble in water, miscible with organic solvents

Vapor Pressure (at 20C)
40 mmHg

Flash Point
5C (Closed Cup)

Density (at 25C)
0.763-0.765 g/cm3

Toxicity
Low (handle in accordance with good industrial hygiene and safety practice)

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