UNSPSC 25173710: Diesel exhaust fluid

An aqueous urea solution made with 32.5% urea and 67.5% deionized water. It is standardised as AUS 32 (aqueous urea solution) in ISO 22241.[3] DEF is used as a consumable in selective catalytic reduction (SCR) in order to lower NOx concentration in the diesel exhaust emissions from diesel engines.

UNSPSC 25173710 Diesel exhaust fluid is a Commodity code covering bulk diesel exhaust fluid (DEF) supplied and delivered to state and local government fleets, maintenance facilities, and equipment operators on an as-needed or standing-inventory basis. State and local buyers under this code include county fleet services divisions, water authorities, solid waste agencies, and school districts operating diesel-powered vehicles and equipment. The scope centers on specifications-driven procurement of DEF meeting American Petroleum Institute, ASTM, and manufacturer standards, with delivery timelines ranging from 24 to 48 hours depending on the urgency and location of the requesting agency.

Recent activity shows concentrated procurement in Florida and California. The Solid Waste Authority of Palm Beach County issued an ITB in June 2026 for furnish and delivery of lubricants including diesel exhaust fluid with 24-hour delivery required to seven facility locations, bidding due May 27, 2026, with an estimated annual spend of $25,000. The County of Sacramento issued an RFB in February 2026 for bulk red antifreeze/coolant (a related product category) through its Sacramento County Procurement Alliance (SCOPA) cooperative purchasing agreement, with estimated annual spend of $30,000 and local business preferences available. Bidders typically must meet insurance requirements including pollution liability coverage, maintain hazardous materials compliance certifications, commit to firm pricing for the initial contract term, and deliver to specified fleet or facility locations on an FOB Destination basis. Contracts are commonly structured with one-year initial terms and multiple optional renewal periods. Most recent solicitations do not restrict competition by set-aside designation, though some jurisdictions encourage small business and minority-owned business participation.