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) 29 31 38 00 Salt of methylphosphonic acid and (aminoiminomethyl)urea (1 : 1) Commodity Code Description 29 31 38 00 00 Salt of methylphosphonic acid and (aminoiminomethyl)urea (1 : 1)