Urea technical grade

Technical Grade Urea (TGU) differs from agricultural grade primarily in its purity and biuret content. You must ensure the Nitrogen content is ≥46% and the Biuret content is <0.9% (ideally <0.8% for SCR/DEF production). Additionally, check for moisture content (<0.5%) and the absence of formaldehyde or anti-caking agents if the product is intended for chemical synthesis or AdBlue/DEF manufacturing.

Buyers should prioritize suppliers with ISO 9001 for quality management and ISO 14001 for environmental standards. For specific applications like automotive grade (DEF/AdBlue), compliance with ISO 22241 is mandatory. Ensure the supplier provides a Certificate of Analysis (COA) for every batch and is compliant with REACH regulations if exporting to the European Union.

Request information on the particle size (typically 0.85mm - 2.80mm) and whether it is prilled or granular. Prilled urea is generally preferred for industrial applications requiring high solubility and rapid dissolution in water. Conduct a solubility test to ensure the solution remains clear and free of insoluble residues, which is critical for preventing equipment clogging in industrial systems.

TGU is widely used in the production of Urea-Formaldehyde (UF) resins for the wood panel industry, as a stabilizer in explosives, and in the pharmaceutical/cosmetic sectors. A major growing market is the production of Diesel Exhaust Fluid (DEF/AdBlue) to reduce NOx emissions in diesel engines. Understanding the end-use helps in determining the required granulometry and chemical additives.

Urea is often subject to government-imposed export restrictions or quotas (especially in major producing countries like China) to ensure domestic supply. Always verify the current export policy of the origin country. Work with reputable suppliers on Made-in-China.com who possess valid export licenses and CIQ (Customs Inspection and Quarantine) clearance to avoid shipment delays at the border.

Urea prices fluctuate based on natural gas costs and global demand. It is advisable to use Formula-based pricing linked to international benchmarks for long-term contracts. For payment, utilize Irrevocable Letters of Credit (L/C at sight) or Trade Assurance to mitigate financial risk. Avoid 100% upfront payments to unknown suppliers; a 30% deposit and 70% against Bill of Lading (B/L) is a standard industry practice.

Urea is hygroscopic, meaning it absorbs moisture from the air. Ensure the use of PP/PE laminated bags (25kg, 50kg, or 1000kg jumbo bags) with an inner liner. For sea freight, specify dry containers and request silica gel desiccant packs to prevent caking during transit. Ensure the vessel holds are clean and dry to avoid cross-contamination with other chemicals.

Conduct a factory audit or hire a third-party inspection firm like SGS or Intertek to perform a Pre-Shipment Inspection (PSI). This verifies the quantity, quality, and packaging before the balance payment is made. On Made-in-China.com, look for Audited Suppliers who have undergone comprehensive on-site verification of their production capabilities and business legitimacy.