Frequently Asked Questions

Here's what our customers are asking

Here you will find frequently asked questions from our customers on how to order a product, order processing, and security of information. If you can't find what you're looking for, please reach out to our team and someone will get back to you shortly. You can also buy products online by visting Brenntag Connect.

What is diesel exhaust fluid (DEF)

We're glad you asked. Diesel Exhaust Fluid (DEF) is a non-toxic, high purity solution comprised of 32.5% urea and 67.5% de-ionized water for specific use in Selective Catalytic Reduction (SCR) systems. Using this fluid in diesel-powered vehicles, such as trucks, buses, and tractors, helps to reduce the amount of nitrogen oxides (NOx) emitted into the air by 90%. It is not a fuel additive and must be filled into the dedicated Diesel Exhaust Fluid tank on your diesel vehicle.

Red White and Blue Parked Trucks Lined up at a Truck Stop in the wintertime in Utah

Why do I need DEF

Simply put, you need DEF to keep your trucks running. This is because many diesel engine manufacturers have chosen Selective Catalytic Reduction (SCR) technology to meet the 2010 EPA Emissions Standards. Diesel Exhaust Fluid is used in the SCR system for on-road diesel vehicles manufactured beginning in 2010. Without DEF, your diesel vehicles will not function. SCR and DEF are used to convert Nitrogen Oxide (NOx) into harmless Nitrogen and Water molecules. Nitrogen makes up about 78% of the air we breathe.

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Click on the topics below to learn more about DEF

Handling, storing, and using DEF

Diesel exhaust fluid safety

Diesel exhaust fluid properties

Ensuring diesel exhaust fluid quality

Technology associated with DEF

How to acquire DEF

Let Brenntag help with your DEF questions

Contact us today to find out more about our specialty chemical product line, or if you have a question about our DEF products. Our experts can help you with any of your DEF needs or questions you may have.

We service all DEF markets including agriculture, automotive, off road applications, and trucking since 2009. Our DEF comes in a variety of package sizing to fit your needs.

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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.