Though considered a non-hazardous nuisance dust, amorphous precipitated silica can be transformed through traditional convective/conductive heating into crystalline forms such as cristobalite
that are known respiratory hazards.
Precision-classified Minbloc[R] grades produced from microcrystalline silica, cristobalite
, or nepheline syenite are available for clarity and high-clarity blown and cast flexible-packaging and agricultural-film applications.
Paint Latex/latex: primer = water, quartz, acrylic resin, titanium dioxide, alkyd resin, silica cristobalite
, silica, isobutyrate ester, zinc oxide, ethylene glycol, octylisothiazolone; top coat = water, acrylic vinyl polymer, titanium dioxide, acrylic resin, propylene glycol, diethylene gylcol, monobutyl ether, silica, octylisothiazolone Alkyd/latex: primer = talc, mineral spirits, tall oil alkyd polymer, titanium dioxide, soya alkyd polymer, mica, mineral spirits 140-flash, cristobalite
, amorphous diatomaceous earth; top coat = water, acrylic polymer, titanium dioxide, zinc oxide, ethylene glycol, quartz, cristobalite
Preservative-treated lumber Nominal 1-inch southern pine boards: CCA-C 0.
016 81 Site Plastic limit Guzman 3 Ajuno 6 Casas Blancas 12 Tepatitlan 16 Apatzingan 58 Morelia 49 + MT = montmorillonite, FD = feldspar, CR = cristobalite
, NX = non-crystaline, KK = kaolinite, HE = hematite.