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. Get your shipment from factory DIRECTLY. We ship Urea 46%N either in Bulk loose in shipload or FIBC 1MT or 50 kg bag package of woven polymeric laminated, polyethylene bags.