Industrial Urea/Prill urea/N46 Industrial Urea/Prill urea/N46 High Quality Earliest Shipment Competitive price Professional ServiceIndustrial Urea/Prill urea/N46Specification :Nitrogen:46.6% biuret:0.9% ... carbamide peroxide, allantoin, and hydantoin. Ureas are closely related to biurets and related in structure to amides, carbamates, carbodiimides, and thiocarbamides Industrial Urea/Prill urea/N46