BGC > Product Search > Hexamethyldisiloxane

Boiling Point	99
Flash Point	-1
Density [25]	0.764
Refractive Index [25]	1.3774
Purity	99%
Color and Appearance	Colorless or yellowish transparent liquid

Package:drum
Appearance: Colorless transparent liquid
Purity: 99.0% min.
PH: 6-7
Density: 0.764
Melting point: -59 ºC
Boiling point: 101 ºC
Refractive index: 1.3765-1.3785
Flash point: -1 ºC
Water solubility: insoluble

Molecular Formula: C6H18OSi2
Molecular Weight: 162.38
Hazard Symbols: F,N,T
UN Number: UN 1993 3/PG 2
WGKGermany: 3
PackingGroup: II
HS Code: 29310095

Appearance	Colorless transparent liquid
HMDS content	≥ 99%
Silanol	≤ 1.0
Melting point	-68℃
Flashing point	-1℃
Refractive index	1.3748
Density(25℃ )g/cm3	0.762-0.77
Boiling point	100℃
Viscosity	0.65

Product name:Hexamethyldisiloxane
Synonyms:((CH3)3Si)2O;1,1,1,3,3,3-Hexamethyldisiloxane;1,1,1,3,3,3-Hexamethyl-disiloxane;belsildm0.65;Bis(trimethylsilyl) oxide;bis(trimethylsilyl)oxide;bis-trimethylsilyloxide;CH7310
CAS: 107-46-0
Formula:C6H18OSi2
Molecular weight: 162.38

Melting point: -59 °C(lit.)
Boiling point: 101 °C(lit.)
Density :0.764 g/mL at 20 °C(lit.)
Vapor Density:>1 (vs air)
Index of refraction: n20/D 1.377(lit.)
Flash point:33 °F
Storage condition:Flammables area
Water solubility:insoluble
BRN :1736258
Stability:Stable, but moisture sensitive. Highly flammable. Incompatible with strong acids, strong bases, oxidizing agents.

Chemical Properties: colorless transparent liquid. Insoluble in water, soluble in organic solvents.

Usage:
1. As head, cleaning agents, mold release agents, mainly used in organic chemical and pharmaceutical production
2. used as a water repellent, insulating materials and moisture-proof agent
3. Instruments for circulating coolant and manufacture all types of silicone products, but also as a water repellent for fabric surface treatment, the radio parts of moisture-proof insulation. Also used gas chromatography stationary phase.
4. This product as a head, cleaning agents, mold release agents, mainly used in organic chemical and pharmaceutical chemical production.
5. As a head, cleaning agents, mold release agents, mainly used in organic chemical and pharmaceutical chemical production. Used in the production of silicone head agent, also used as silazane materials. For silicone rubber, pharmaceuticals, gas chromatography stationary phase, analytical reagents, water-repellent agents.

Brief Manufacture process:

The 62.49g (0.575mol) of trimethylchlorosilane was added dropwise to 72.7g (0.06mol) N, N- dimethylaniline and 7g of water was heated at reflux for 1h. Atmospheric distillation, collecting 98-101 ℃ fraction, is dried hexamethyldisilazane ether to give 43-44g, a yield of 92-94%. Industrial production is trimethylchlorosilane hydrolysis at 30-40 deg.] C.