Section 06 Products of the chemical or allied 38 Miscellaneous chemical products 38 22 Diagnostic or laboratory reagents on a backing, prepared diagnostic or laboratory reagents whether or not on a backing, other than those of heading 3002 or 3006; certified reference materials 38 22 90 - Other 38 22 90 00 - Other Commodity Code Description 38 22 90 00 000 - Other