Aerosil
Description
[Degussa-Huls] A registered trademark for an ultra-fine powdered silica. Aerosil® is a colloidal form of silica that is a very light and fluffy powder. It is made by burning silicon tetrachloride in a hydrogen-oxygen furnace. This produces spherical particles; the particle size can be controlled and varying grades are available ranging in size from 4 to 25 micrometers. The fine particle size provides a high surface area. Aerosil® particles can absorb up to 40% of their own weight and still perform as a powder. It is used as a filler, thickener, and as a matting agent in paints.
Synonyms and Related Terms
aerosol silica; amorphous fumed silica; hydrophilic sillica
Other Properties
pH = 3.6-4.5
| CAS | 112945-52-5 |
|---|---|
| Melting Point | 1700 |
| Density | about 2.2 |
| Refractive Index | 1.45 |
Hazards and Safety
Inhalation may cause silicosis; use dust mask. Particles can irritate eyes.
Non-flammable. Inert.
Degussa: MSDS
Authority
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 709
- Ceramics and Glass Conservation Section, List of Workshop Materials, The British Museum, London
- MSDS Sheet Comment: at MFA: old CAS# = 68611-44-9
- Product Information Comment: Degussa AG product brochure
- Website address 1 Comment: www.walsh-assoc.com/continue.html