page_title: Fumed silica
hierarchical_section_title: Fumed silica
caption_attribution_description: Silicon dioxide powder (silica fume), 130m²/g surface area, placed on the scanner under a blue book, scanned in at 1600dpi.
context_page_description: Fumed silica, also known as pyrogenic silica because it is produced in a flame, consists of microscopic droplets of amorphous silica fused into branched, chainlike, three-dimensional secondary particles which then agglomerate into tertiary particles. The resulting powder has an extremely low bulk density and high surface area. Its three-dimensional structure results in viscosity-increasing, thixotropic behavior when used as a thickener or reinforcing filler.
context_section_description: Fumed silica (CAS number 112945-52-5), also known as pyrogenic silica because it is produced in a flame, consists of microscopic droplets of amorphous silica fused into branched, chainlike, three-dimensional secondary particles which then agglomerate into tertiary particles.  The resulting powder has an extremely low bulk density and high surface area.  Its three-dimensional structure results in viscosity-increasing, thixotropic behavior when used as a thickener or reinforcing filler.
caption: Fumed silica with surface area of 130 m2/g
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