1h-nmr file need you sign up or log in to view or download. you also can through below form to request documents for moa,ros,1h-nmr. Home. about us. our products. contact us. factory pictures water treatment chemicals. antiscalant(n-50) broxo salt For a completely non-toxic roach killer, use food grade diatomaceous earth. roaches crawl through the boric acid powder and the tiny particles cling on to their bodies. when they clean their bodies by licking themselves clean, they ingest the boric acid (which acts as a stomach poison). they die shortly after. Anhydrous borax is white solid crystalline product used in gold smelting as a flux. the advantages of using borax in gold smelting are: facilitates separation of the gold from gangue at lower temperatures; borax forms a structural network with rock silicates that captures metal ions which normally associate with oxides eg.