Section 06 Products of the chemical or allied industries 38 Miscellaneous chemical products 38 22 Diagnostic or laboratory reagents on a backing, prepared diagnostic or laboratory reagents whether or not on a backing, whether or not put up in the form of kits, other than those of heading 30.06; certified reference materials 38 22 13 For blood-grouping Commodity Code Description 38 22 13 00 For blood-grouping