... masses, efflorescent, soluble in water, very soluble in boiling water, freely soluble in glycerol. Specifications: na2b4o7 ... in pesticide, fertilizer, optics glass, glass fiber, colored metal as jointing agent, cohering agent for jewelry, printing and dyeing, detergent ... , refined gold, cosmetics, borax soap, antiseptic, antifreeze, and in pharmaceuticals as disinfectors ...