Commodity200520062007200820092010
Phenazone (antipyrin) & its derivs.$69     
Heterocyclic comps. cont. an unfused pyrazole ring (whether or not hydrogen ...$17,376$160$16,240$32 $61,075
Heterocyclic comps. cont. an unfused imidazole ring (whether or not hydroge ...$729$768$5,925$2,139$2,828$13,189
Pyridine & its salts$545$51$170$337$273$5,730
Heterocyclic comps. cont. an unfused pyridine ring (whether or not hydrogen ...$930$3,795$1,646$33,086$103,277$25,413
Heterocyclic comps. cont. a pyrimidine ring (whether or not hydrogenated)/p ...$1,169$3,942$4,802$916$31,166$76,924
Melamine    $51,579$1,321
Heterocyclic comps. cont. an unfused triazine ring (whether or not hydrogen ...$2,547$86$94$12,338$98 
Lactams (excl. of 2933.71 & 2933.72)$113$148$484$2,060  
Total$23,478$8,950$29,361$50,908$189,221$183,652