Porcine Reproductive and Respiratory Syndrome (PRRS) Authors: Jeff Zimmerman, Iowa State University; David Benfield, The Ohio State University; Jane Christopher-Hennings, South Dakota State University; Scott Dee, University of Minnesota; Greg Stevenson, Purdue University.
Therefore, the substance zirconia aluminosilicate refractory ceramic fibres (SiO 2, Al 2 O 3, ZrO 2) as described in this document are a subset of the group of substances which are defined by the refractory ceramic fibres in Annex VI of the Regulation (EC) No 1272/2008.
Reaction with water. Silicon dioxide doesn't react with water, because of the difficulty of breaking up the giant covalent structure. Reaction with bases. Silicon dioxide reacts with sodium hydroxide solution, but only if it is hot and concentrated. A colourless solution of sodium silicate is formed.