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    Nitrogen+Syngas 389 May-Jun 2024

    Problem No. 73: Practical guidance on reducing biuret formation in urea


    Biuret is a chemical compound with the chemical formula HN(CONH2 )2 , also known as carbamylurea. It is a commonly occurring undesirable impurity in urea-based fertilizers, as biuret is toxic to plants. Biuret is formed from urea, according to the following overall reaction:

    2NH2 CONH2 → NH2 CONHCONH2 + NH3 urea biuret ammonia

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