... in water, very soluble in boiling water, freely soluble in glycerol. Usage: mainly used for glass and porcelain enamel industry. ... jointing agent, cohering agent for jewelry, printing and dyeing, detergent, refined gold, cosmetics, borax soap, antiseptic, antifreeze, and in pharmaceuticals ... INSOLUBLE MATTER % ≤ 0.015Fe % ≤ 0.002Chloride as Cl % ≤0.03 High Quality Inorganic Borate Borax Pentahydrate