Section 06 Products of the chemical or allied industries 29 Organic chemicals 29 31 Other organo-inorganic compounds 29 31 38 Salt of methylphosphonic acid and (aminoiminomethyl) urea (1:1) 2931.39 29 31 38 00 Salt of methylphosphonic acid and (aminoiminomethyl) urea (1:1) 2931.39 Commodity Code Description 29 31 38 00 000 Salt of methylphosphonic acid and (aminoiminomethyl) urea (1:1) 2931.39