Hexamethyldisiloxane
- Product Name
- Hexamethyldisiloxane
- CAS No.
- 107-46-0
- Chemical Name
- Hexamethyldisiloxane
- Synonyms
- HMDSO;HMDO;DISILOXANE;1,1,1,3,3,3-Hexamethyldisiloxane;SILICONE FLUID;Fluka AG;Hexamethylene disiloxane;hexamethyldisiloxane(hmdo);os10;HX 18
- CBNumber
- CB2446352
- Molecular Formula
- C6H18OSi2
- Formula Weight
- 162.38
- MOL File
- 107-46-0.mol
Hexamethyldisiloxane Property
- Melting point:
- −59 °C(lit.)
- Boiling point:
- 101 °C(lit.)
- Density
- 0.764 g/mL at 20 °C(lit.)
- vapor density
- >1 (vs air)
- vapor pressure
- 20 hPa (20 °C)
- refractive index
- n20/D 1.377(lit.)
- Flash point:
- 33 °F
- storage temp.
- Store below +30°C.
- solubility
- 0.00037g/l insoluble
- form
- liquid
- color
- Colorless to Almost colorless
- Specific Gravity
- 0.76
- explosive limit
- 0.5-21.8%(V)
- Water Solubility
- insoluble
- Hydrolytic Sensitivity
- 1: no significant reaction with aqueous systems
- BRN
- 1736258
- Dielectric constant
- 2.2（20℃）
- Stability:
- Stable, but moisture sensitive. Highly flammable. Incompatible with strong acids, strong bases, oxidizing agents.
- InChIKey
- UQEAIHBTYFGYIE-UHFFFAOYSA-N
- LogP
- 5.06 at 20℃
- CAS DataBase Reference
- 107-46-0(CAS DataBase Reference)
- NIST Chemistry Reference
- Disiloxane, hexamethyl-(107-46-0)
- EPA Substance Registry System
- Hexamethyldisiloxane (107-46-0)
Safety
- Hazard Codes
- F,N,T
- Risk Statements
- 11-50/53-65-51/53-48/23/24/25-36/38-46-45
- Safety Statements
- 16-61-62-45-26-53
- RIDADR
- UN 1993 3/PG 2
- WGK Germany
- 3
- RTECS
- JM9237000
- F
- 10
- Autoignition Temperature
- 340 °C
- TSCA
- Yes
- HazardClass
- 3
- PackingGroup
- II
- HS Code
- 29310095
- Hazardous Substances Data
- 107-46-0(Hazardous Substances Data)
- Toxicity
- LD50 orally in Rabbit: > 12160 mg/kg LD50 dermal Rat > 2000 mg/kg
Hazard and Precautionary Statements (GHS)
- Symbol(GHS)
-
- Signal word
- Danger
- Hazard statements
-
H225Highly Flammable liquid and vapour
H410Very toxic to aquatic life with long lasting effects
- Precautionary statements
-
P210Keep away from heat/sparks/open flames/hot surfaces. — No smoking.
P273Avoid release to the environment.
N-Bromosuccinimide Price
- Product number
- 8.14051
- Product name
- Hexamethyldisiloxane
- Purity
- for synthesis
- Packaging
- 100mL
- Price
- $43
- Updated
- 2024/03/01
- Product number
- 8.14051
- Product name
- Hexamethyldisiloxane
- Purity
- for synthesis
- Packaging
- 500mL
- Price
- $166
- Updated
- 2024/03/01
- Product number
- H0091
- Product name
- Hexamethyldisiloxane
- Purity
- >98.0%(GC)
- Packaging
- 25mL
- Price
- $17
- Updated
- 2024/03/01
- Product number
- H0091
- Product name
- Hexamethyldisiloxane
- Purity
- >98.0%(GC)
- Packaging
- 100mL
- Price
- $20
- Updated
- 2024/03/01
- Product number
- A11848
- Product name
- Hexamethyldisiloxane, 98+%
- Packaging
- 100ml
- Price
- $25.65
- Updated
- 2024/03/01
Hexamethyldisiloxane Chemical Properties,Usage,Production
Chemical Properties
Hexamethyldisiloxane (HMDS) is a colorless or yellowish transparent liquid with a measured melting point of -68.2°C and a measured boiling point of 100.5°C at 1013 hPa. The measured vapor pressure is 44.51 hPa at 20 oC. The measured water solubility is 0.93 ± 0.63 mg/L at 23 oC. The measured log Kow of HMDS is 5.20 at 20 oC. Estimated log Koc values using EPISuite v 4.10 range from 2.5 (MCI method) to 4.5 (Kow method). As Episuite does not contain fragments for siloxanes for log Koc predictions, these values should be treated with caution. The potential for hydrolysis of the test substance may have influenced the determination of partition coefficient and water solubility.
Physical properties
Hexamethyldisiloxane is a colorless and transparent liquid. It is easily deliquescent, flammable, and has the risk of causing combustion when exposed to high heat, open flame, and strong oxidizing agents. Boiling point 99.5℃. Flash point -1.1℃. Relative density (d2525) 0.7606. refractive index 1.3750. insoluble in water, soluble in many organic solvents.
Uses
The most popular precursor chemical is hexamethyldisiloxane (HMDS) which with the addition of helium and oxygen will produce a silica coating. it is used in a variety of consumer applications and can be used as intermediates in the production of silicone polymers.
Uses
Hexamethyldisiloxane is used as a base fluid in a wide range of personal care products that require fast evaporation and high spreadability. When blended with Dimethicone fluids, It can adjust the residence time of the silicone on the skin. Unlike other volatile fluids, Hexamethyldisiloxane Fluid does not cool the skin as it evaporates. Hexamethyldisiloxane is used as a carrying agent and diluent in the following: skin cream lotions, bath oils, suntan lotions, nail polishes, antiperspirants, deodorants, hair sprays and other beauty and hair care products.
A silicon based compound that can be used to create potentially biocompatible materials.
Used as a monomer in the synthesis of long chain polysiloxane structures.
Used in the methylation of mercury(II) salts.
Uses
Hexamethyldisiloxane can be used as silylating agent for carboxylic acids, and alcohols; used in preparation of aroyl chlorides; precursor for a variety of trimethylsilyl derivatives.Hexamethyldisiloxane has been used as an inexpensive starting material for the preparation of numerous synthetically useful trimethylsilyl derivatives.
Preparation
Synthesis of hexamethyldisiloxane by hydrolysis of trimethylsilyl chloride, water and sodium hydroxide.
Definition
ChEBI: Hexamethyldisiloxane is an organosiloxane consisting of two trimethylsilyl groups covalently bound to a central oxygen.
Production Methods
Produced via acid hydrolysis of chlorotrimethylsilane and purification by distillation.
General Description
Hexamethyldisiloxane (HMDSO), a linear polydisiloxane, is an organosilicon reagent commonly utilized as a source for plasma enhanced chemical vapor deposition (PE-CVD) of thin films of silicon compounds. It is also employed as a substitute to silane in silicon integrated circuit technology. Its dissociative ionization by electron impact has been studied by Fourier transform mass spectrometry. Synthesis of plasma-polymerized HMDSO thin films by atmospheric pressure glow (APG) discharge has been reported. Crystals of HMDSO at 148K are monoclinic. Addition of HMDSO to P4S10, improves its efficiency as thionating agent.
Flammability and Explosibility
Highly flammable
Purification Methods
Fractionally distil through a column packed with glass helices with ca 15 theoretical 20 1.3777. plates. It is highly flammable and is an irritant. [Mills & McKenzie J Am Chem Soc 76 2672 1954, Csakvari et al. J Organometal Chem 107 287 1976, Beilstein 4 IV 4018.]
Hexamethyldisiloxane Preparation Products And Raw materials
Raw materials
Preparation Products
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View Lastest Price from Hexamethyldisiloxane manufacturers
- Product
- Hexamethyldisiloxane(HMDO) 107-46-0
- Price
- US $0.00/Kg/Drum
- Min. Order
- 25Kg/Drum
- Purity
- 99%
- Supply Ability
- 200 tons
- Release date
- 2020-08-07
- Product
- Hexamethyldisiloxane 107-46-0
- Price
- US $50.00-1.00/KG
- Min. Order
- 1KG
- Purity
- 99%
- Supply Ability
- g-kg-tons, free sample is available
- Release date
- 2023-12-22
- Product
- Hexamethyldisioxane 107-46-0
- Price
- US $100.00/kg
- Min. Order
- 1kg
- Purity
- 0.99
- Supply Ability
- 100 tons
- Release date
- 2022-09-23