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 lubricants and fuel additives purchased by state and local jurisdictions for fleet and equipment maintenance. State and local governments procure diesel exhaust fluid as one component of broader automotive and facility lubricant supply contracts, often bundled with engine oils, hydraulic fluids, greases, antifreeze, and transmission fluids purchased on an as-needed basis through blanket purchase orders or term supply agreements. Issuing bodies include school districts, county utilities, municipal fleet departments, and special-purpose authorities. School districts and county solid waste authorities appear as repeat buyers in recent solicitations, with purchases driven by fleet maintenance operations and heavy equipment upkeep.

Recent activity spans Florida and Texas jurisdictions. The Solid Waste Authority of Palm Beach County solicited lubricants including diesel exhaust fluid under ITB 26-09, due May 27, 2026, specifying bulk and 55-gallon drum delivery with 24-hour response required for diesel exhaust fluid, estimated annual expenditure of $25,000, and lot-by-lot award to primary and secondary vendors. The City of Tampa issued RFQ 26-P-00418 on August 10, 2026 for automotive shop supplies including related fluids for departmental use across Hillsborough County, due July 22, 2026. Parkway School District in Missouri requested bids on lubrication products under solicitation 2751, due October 27, 2026, on a blanket purchase-order basis with as-needed ordering. Harlingen Consolidated Independent School District in Texas posted Bid MMTR0826 for fleet lubricants and fluids, due August 6, 2026.