<http://webisa.webdatacommons.org/prov/426737685>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/374207917> .
<http://webisa.webdatacommons.org/374207917>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<docstoc.com> .
<http://webisa.webdatacommons.org/374207917>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/374207917>	<http://www.w3.org/ns/prov#value>	"alkali metal silicate, more particularly sodium metasilicate with an Na.sub.2 O:SiO.sub.2 ratio of 1:0.8 to 1:0.3 and preferably 1:1, which is used in water-free form. Besides the alkali metal silicate, water-free alkali metal carbonate and alkali metal" .