Sub-Chapter200520062007200820092010
Hydrogen, rare gases and other non-metals.$6,813  $690$2,701 
Other inorganic acids and oxygen compounds $8,755  $257 
Ammonia, anhydrous or in aqueous solution. $341    
Sodium hydroxide (caustic soda);  $36   
Artificial corundum, whether or not chemically defined;$704     
Chlorides, chloride oxides and chloride hydroxides     $89
Carbides, whether or not chemically defined.   $2,573  
Total$7,517$9,096$36$3,263$2,958$89