Overview
Industrial urea, chemically known as carbamide, is an organic compound with the formula CO(NH₂)₂. It is one of the most important nitrogen-containing chemicals globally, primarily synthesized from ammonia and carbon dioxide through the Bosch-Meiser process. With its high nitrogen content (46%), urea serves as a cornerstone in agricultural fertilizers. Beyond agriculture, it finds extensive use in industrial applications such as resin production, NOx reduction in diesel engines, and as a raw material for melamine and urea-formaldehyde resins.
Physical and Chemical Properties
Industrial urea appears as white, odorless crystals or prills with a density of 1.32 g/cm³. It melts at 132-135°C but decomposes before boiling when heated further. The compound is highly soluble in water (107.9 g/100 ml at 20°C) and slightly soluble in ethanol. Urea's chemical stability and neutral pH make it versatile for various applications. However, it is hygroscopic, requiring careful storage to prevent caking. When heated above its melting point, urea decomposes to form biuret, ammonia, and other compounds, which is relevant for certain industrial processes.
Main Applications
Agriculture consumes approximately 90% of global urea production as a nitrogen-rich fertilizer. Its slow-release properties and high nutrient content make it ideal for crop nutrition worldwide. In industrial contexts, urea serves as a key component in urea-formaldehyde resins for plywood and particleboard manufacturing. The automotive industry uses urea solutions (AdBlue) in selective catalytic reduction (SCR) systems to reduce NOx emissions from diesel engines. Additional applications include animal feed supplements, cosmetics, and pharmaceutical intermediates.
Safety and Storage
While urea has low acute toxicity, proper handling is essential. Workers should avoid prolonged skin contact and inhalation of dust, which may cause irritation. Eye protection and dust masks are recommended when handling large quantities. Storage requires dry, well-ventilated areas below 30°C to prevent moisture absorption and caking. Urea should be kept separate from strong oxidizers and acids. Bulk storage in silos or sealed bags maintains product quality. Regular temperature monitoring prevents decomposition in hot climates.
B2B Procurement Guide
When sourcing industrial urea, buyers should specify required parameters including nitrogen content (typically 46% minimum), biuret content (below 1% for foliar applications), and particle size (prills or granules). Agricultural versus industrial grades may have different purity requirements. Procurement professionals should evaluate suppliers based on production capacity, quality certifications (ISO, REACH), and logistics capabilities. Bulk shipments (1,000+ metric tons) typically offer cost advantages, while bagged urea suits smaller operations. Consider regional production hubs like China, the Middle East, and Russia for competitive pricing.
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