The forms of amorphous silica for which there are or have been health standards are * ditomaceous earth-calcined,
* diatomaceous earth-uncalcined,
* precipitated and gel,
* fumed, and
fumed is the only one that has no NIOSH, MAK, OSHA, of AIHA standard and the TLV was withdrawn.
In a message dated 6/28/2012 8:34:40 PM Eastern Daylight Time, rmainer**At_Symbol_Here**GMAVT.NET writes:
Is silica gel the same thing as fumed silica (e.g. Cabosil, Aerosil)?
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