2528 Borates, natural, and concentrates thereof, whether or not calcined, and natural boric acids containing <= 85% of H3BO3 calculated on the dry weight (excl. borates separated from natural brine)

2528 (01/1988-..) Borates, natural, and concentrates thereof, whether or not calcined, and natural boric acids containing <= 85% of H3BO3 calculated on the dry weight (excl. borates separated from natural brine) 25280000 (01/2012-..) Borates, natural, and concentrates thereof, whether or not calcined, and natural boric acids containing <= 85% of H3BO3 calculated on the dry weight (excl. borates separated from natural brine) 25281000 (01/1988-12/1991) Natural sodium borates and concentrates thereof, whether or not calcined (excl. borates separated from natural brine) 25289000 (01/1988-12/1991) Natural borates and concentrates thereof, whether or not calcined, and natural boric acid containing =< 85 % of h3bo3 calculated on the dry weight (excl. natural sodium borates and concentrates thereof)