Section 06 PRODUCTS OF THE CHEMICAL OR ALLIED INDUSTRIES 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