Description and features
Silqon HMDS (Hexamethyldisilazane) is a strong and versatile liquid silylation agent which has C6H19NSI2 as chemical formula. Unlike chlorosilanes no base is needed as a hydrochloric acceptor.
SilQon HMDS (Hexamethyldisilazane) is also known as Bis(trimethylsilyl)amine, 1,1,1-Trimethyl-N-(trimethylsilyl)silanamine or HDMZ.
Availability
Europe: SilQon HMDS is ➔ on stock in our local warehouse. Our lead time is about one week if delivered in 150 Kg drums.
United States, Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details.
Product Identification
| CAS number | 999-97-3 |
| EC number | 213-668-5 |
| HS code | 2931 90 00 |
| EC name | 1,1,1,3,3,3-hexamethyldisilazane |
| IUPAC name | bis(trimethylsilyl)amine |
Specification
| Appearance | Clear liquid with ammonia odour |
| Assay | ≥99.0 % |
| Hexamethyldisiloxane | ≤1.0 % |
Application
Hydrophobation of substrates for better dispersion and viscosity reduction and for better adhesion as filler in polymers. Also used in production silicone rubber and pharmaceuticals.
Packaging
Available packaging: 150 KG drums.
Special packaging is available on request.
Storage
Store Hexamethyldisilazane cool in a dry and well-ventilated area and in line with legal requirements.
Keep SilQon HMDS away from heat sources and oxidizing agents.
MSDS
A Material Safety Data Sheets (MSDS) is available for SilQon HMDS and all other products supplied by Vesta Chemicals BV.
An MSDS describes the hazards of a product and explains how a product can be safely handled, used and stored. Besides it provides important regulatory and emergency response information for the purchased product.
Molecular and structural information
| Molecular formula | C6H19NSI2 |
| Molecular weight | 161.39 g/mol |
| Smiles notation | C[Si](C)(C)N[Si](C)(C)C |
| InChi key | FFUAGWLWBBFQJT-UHFFFAOYSA-N |
| Structural formula |  |
Physicochemical information
| Boiling point | 125 ºC @ 1013 hPa |
| Density | 0.77 g/cm3 @ 20°C |
| Flash point | 11.4 °C @ 1013 hPa |
| Melting point | -76.2 °C at 1013 hPa |
| Log Kow | 1.19 at 20°C |
| Solubility in water | Not relevant |
| Vapor pressure (MGM) | 2400 Pa at 25°C |