Search results for boric acid at sigma-aldrich. compare products: select up to 4 products. *please select more than one item to compare The utilization of citric acid in the various industries in saudi arabia has grown significantly in the past 10 to 15 years. approximately us$11 billion of food and beverages are imported. saudi arabia has a significant demand potential for food and beverages industries. 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. Raez sulphates factory is located in riyadh, the central region in saudi arabia. it was established in 2002 for the production of sulphuric acid, linear alkyl benzene sulphonic acid (labsa), potassium sulphatefertilizer grade, and hydrochloric acid.