Section 05 MINERAL PRODUCTS 25 SALT;SULPHUR;EARTHS AND STONE;PLASTERING MINERALS, LIME AND CEMENT 25 28 BORIC ACID CONTAINING NOT MORE THAN 85% OF H3BO3 CALCULATED ON THE 25 28 00 NATURAL BORATES AND CONCENTRATES THEREOF (WHETHER OR NOT CALCINED), BUT ..... Commodity Code Description 25 28 00 00 NATURAL BORATES AND CONCENTRATES THEREOF (WHETHER OR NOT CALCINED), BUT .....