1.Urea 46%min 2.Nitrogen: 46.6% 3.Biuret:0.9%, 4.Moisture:0.4%, 5 ... .Particle size( 0.85-2.8mm) 98%. 1.Urea 46% ... min2.Nitrogen: 46.6% 3.Biuret:0.9%, 4.Moisture:0.4 ... ItemPremium GradeFirst GradeQualified GradeTest ResultAppearanceWhite or Light White whiteTotal Nitrogen %≥46.446.24646.6Biuret%≤ 0.91.01.51.0Moisture%≤ 0.40 ...