Diesel Exhaust Fluid (DEF)

Brenntag Truck North America

DEF for diesel-powered vehicles with a SCR catalytic converter

As worldwide regulations for nitrogen oxide (NOx) emissions become stricter, a growing number of countries are beginning to make Diesel Exhaust Fluid mandatory for new diesel engines, including light and heavy-duty trucks, off-road agricultural and industrial equipment, and even new passenger cars.

DEF is a special ultrapure urea solution that is used as a reducing agent in SCR (Selective Catalytic Reduction) technology. DEF is a high-purity 32.5% aqueous urea (ammonia) and 67.5% de-ionized water for specific use in SCR systems.

Diesel-powered vehicles with an SCR catalytic converter and an additional separate tank for DEF can convert their output of nitrogen oxides into neutral nitrogen and water, thus achieving a considerable reduction of their NOx emissions. Brenntag is the largest worldwide distributor of Diesel Exhaust Fluid.

Tractor working in field of wheat


Whether your machines are working in cornfields, orange groves or on cattle farms, they always need to be in top working condition. Purchase DEF from a dependable distributor with a high-quality product.

We take pride in the quality of our product and reliability of our supply chain and are dedicated to delivering you with exceptional product safely and on-time.

  Car driving on a road


Worldwide, many manufacturers use SCR systems in their passenger cars, which require DEF to comply with NOx reduction regulations. We advise you on the right technology for refilling and supply you with fluid of the highest quality.

  Bulldozer on a nice perspective


Between demolishing an old building and excavating a new one, you don't have time to worry about keeping your equipment running smoothly.

Your machines are the lifeblood of your business, and you can't afford to lose time - or money - on maintenance and expensive repairs. Our primary goal is to ensure the efficient operation of your equipment.

Freight trucks


Your vehicle fleet is essential to your daily operations. If it's not operational due to poor maintenance, it directly affects your profits. Purchasing our quality products ensures reliability for your business.

semi truck 18 wheeler

DEF Services are tailored to your individual need

Our state-of-the-art facilities and laboratory support for Diesel Exhaust Fluid are unrivaled in the industry. We also own and operate DEF production facilities in several countries and have strong reliable partnerships with major urea producers worldwide.

We offer you DEF-related services that are tailored to your individual needs for shipping, packaging, and volume, as well as telemetry solutions to further ensure timely refills at our customers’ bulk sites. In addition, we offer customized equipment solutions that meet the highest industry standards.

Speak to a team member

Contact us today to find out more about our product offerings, to ask us any questions, or to let us know how we can assist you with a specific application.