Section 06 Products of the chemical or allied 29 Organic chemicals 29 31 Other organo-inorganic compounds 29 31 48 -- 3,9-Dimethyl-2,4,8,10-tetraoxa-3,9- Diphosphaspiro [5.5] undecane 3,9-dioxide Commodity Code Description 29 31 48 00 -- 3,9-Dimethyl-2,4,8,10-tetraoxa-3,9- Diphosphaspiro [5.5] undecane 3,9-dioxide