Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lirne and cement 25 28 Natural borates and concentrates; natural boric acid 25 28 90 Natural borates (excl. sodium) and concentrates; natural boric acid Commodity Code Description 25 28 90 00 Natural borates (excl. sodium) and concentrates; natural boric acid
