... chemical reaction from dehydration. They have actually altered (at least on their surface) to the mineral tincalconite, Na2 B4O7-5H2O, with ... fiber, colored metal as jointing agent, cohering agent for jewelry, printing and dyeing, detergent, refined gold, cosmetics, borax soap, antiseptic, ... INSOLUBLE MATTER % ≤ 0.015Fe % ≤ 0.002Chloride as Cl % ≤0.03 High Quality Inorganic Borate Borax Pentahydrate