Aerosil

From CAMEO
Jump to: navigation, search

Description

[Evonik] A registered trademark for an ultra-fine powdered Silica that was first mae in 1944 by Degussa. 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; fumed silica gel

Applications

Personal Risks

Inhalation may cause silicosis; use dust mask. Particles can irritate eyes.

CDH Fine Chemical SDS

Collection Risks

Non-flammable. Inert.

Environmental Risks

Physical and Chemical Properties

  • pH = 3.6-4.5
  • CAS = 112945-52-5
  • Melting Point = 1700
  • Density = about 2.2
  • Refractive Index = 1.45

Working Properties

Forms and Sizes

Resources and Citations

  • Evonik: History of Aerosil
  • 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 at MFA: old CAS# = 68611-44-9
  • Product Information: Degussa AG product brochure
  • www.walsh-assoc.com/continue.html