Urea Fertilizer 46% N Gost 2081-92 Prilled Urea (prilled) Gost 2081-92 Nitrogen : 46.0% Min (On Dry Basis) Moisture: 0.5% Max Biuret %Age By Weight: 1.0% Max Particle Size (i) Material Passing thro ugh 2.8mm IS Sieve (Tyler Sieve 7) and retained on 1mm IS Sieve (Tyler Sieve 16) by weight i) To pass through 1mm IS Sieve by weight : 90% MIN,5% MAX MELTING POINT: 132 Degrees Celsius COLOUR: Pure white RADIATION: NON-Radioactive. FREE FLOWING: 100% Treated against caking, free from harmful substances. PHYSICAL: PRILLED, free from harmful substances, impurities & dust. FREE AMMONIA: 160 PXT, PPM. MAX. UREA 46%N Agriculture grade Prilled | Granular -Grade Extra- | Total nitrogen: 46.2% min. | Humidity: 0.3% max. | Biuret: 1% max. | Allowed production class: 0.85-2 mm/2-4 mm. | Formaldehyde: 0.35 â?? 0.55% min. | Free Ammonia: 50 ppm. | Resistance to fragmentation: 3 kg for granule with a diameter of 3.15 mm. | Temperature: Max 50 min 5 | Density: 760 to 800 kg / m3 | Appearance: white Granules.