What are the ingredients in DEF?

What Is DEF Fluid Made of? Diesel Exhaust Fluid (DEF) which is composed of 32.5 percent urea and 67.5 percent deionized water. For those who like trivia, urea is considered to be the first organic compound to be synthesized from inorganic chemicals.
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What is DEF made up of?

It's called Diesel Exhaust Fluid (DEF). This additive is also called aqueous urea solution 32% or AUS 32. It's made from 32.5% urea and 67.5% de-ionized water. Read on to find out everything you need to know about the DEF in your DEF system.
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Is DEF fluid made from pig urine?

Urea is an organic compound produced when a body metabolizes protein. (And yes, we expel it as urine.) But despite DEF earning the nickname “pig urine,” Diesel Exhaust Fluid is actually made of commercial-grade urea—synthetic ammonia and carbon.
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Is DEF made from cow urine?

Contrary to popular myth, cow and bat urine and DEF are not a thing. The urea used in the manufacture of DEF is synthetically derived from ammonia and carbon dioxide, and urea production plants are often adjacent to other sites where ammonia is produced, such as coal and natural gas refineries.
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Is DEF made from cat urine?

The short answer is no. Commercially available DEF does not contain any animal urine.
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DEF Diesel Exhaust Fluid What is it? How does it work?



Can you make def fluid?

DEF is a mixture of (typically) 2/3 deionized water and 1/3 urea. It's carefully regulated by the American Petroleum Institute. Technically, urea is derived from one of the byproducts of urine. But it's synthetically made, so no cats are ever harmed in the production of the fluid.
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What happens if you put diesel fuel in a DEF tank?

However, a small number of cases have been reported where diesel has been put in the DEF tank. Diesel is less dense than DEF and will float on top of the DEF in the tank, but even small amounts of diesel can damage your SCR system and we recommend that you contact your dealer immediately and do not drive the vehicle.
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Can you pee in the DEF tank?

Please do not urinate in your DEF tank, the SCR system will be damaged and it will cost thousands of dollars to repair. Here at Transliquid Technologies we specialize in providing the best quality of Diesel Exhaust Fluid.
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What can you use instead of DEF fluid?

DEF is urea or otherwise known as aqueous ammonia. Windshield washer fluid that contains ammonia will do in a pinch.
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What happens if u put water in DEF tank?

If you put water in an EMPTY DEF tank, there will be no urea injected into the exhaust to convert to ammonia. Ammonia is an essential requirement to eliminate NOX (Oxides of Nitrogen) via the SCR (Selective Catalytic Reducer).
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What is blue DEF made out of?

BlueDEF® Diesel Exhaust Fluid is a mixture of high purity synthetic urea and deionized water that is used in Selective Catalytic Reduction (SCR) systems in diesel vehicles. DEF is used to help convert NOx to harmless nitrogen and water.
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What dissolves DEF crystals?

Premium Member. The crystals dissolve almost instantly with water. You may want to use distilled water for cleaning that spill cup. Then if any leaks into the tank it won't be a big deal.
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Is DEF poisonous?

In all actuality, DEF is completely non-toxic, non-flammable, and non-hazardous. It's safe for transport and poses no risk if it comes in contact with skin. While it may not be toxic, it's extremely important to prevent contamination. Even a single teaspoon of salt could destroy the purity of 5,000 gallons of DEF.
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Why is DEF so expensive?

Because of its high content with urea, and the higher quality of urea it takes to manufacture DEF, the prices of urea most often drive the cost of DEF. According to Jobbers World, the price of urea reached $442 a ton in June, up from $380 a ton in May.
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Is DEF bad for the environment?

While it's good for the environment, the water and urea mixture can result in the formation of crystals that can plug up fuel filters, damage aircraft engines, and result in engine failure. DEF should never be used as an additive for any fuel, diesel or aircraft, and is sprayed directly into exhaust systems.
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Is DEF bad for diesel engines?

If DEF enters the fuel system and spread throughout the engine it will ruin the diesel engine eventually. The fuel system lines are not compatible with DEF and slowly corrode and over time.
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Why is there a DEF shortage?

Skyrocketing natural gas prices in the EU have driven up manufacturing costs, significantly increasing the cost of DEF. Chinese and Russian Restrictions – China, a key supplier of urea, has restricted exports to curb domestic shortages.
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Can I run water instead of DEF?

Subject: RE: Anyone replace DEF with water? Water won't hurt the system but it will de-rate you pretty quick. ECM compares NOx values pre/post, if conversion is low it will start throwing codes and will eventually derate.
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Is there a DEF shortage in the US?

The global microchip shortage, exacerbated by the COVID pandemic supply chain disruptions, has resulted in a shortage of Diesel Exhaust Fluid (DEF) sensors. These sensors are required on heavy-duty diesel vehicles to ensure that the emissions controls needed to meet clean air standards are in place and working.
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Can I use DEF as fertilizer?

DEF is essentially 48-0-0 as a fertilizer. "32" is not urea, it's urea ammonium nitrate, which is a different thing. (If you were fertilizing something in a garden, for its proper nutrition, you'd need to add other substances to the "DEF" to create the right mixture.
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Is DEF fluid good after it freezes?

The individual components do not separate or negatively impact the effectiveness of the solution. Cycles of freezing and thawing have no effect on DEF fuel quality, regardless of how many times the cycle is repeated.
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Why does DEF fluid crystallize?

DEF crystallizes when stored for prolonged periods as the water evaporates. Do not use DEF that shows signs of crystallization and always completely use a container to avoid storing opened containers. Refill DEF only when the level indicator reaches 1/2 or less.
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What happens when you put blue def in diesel tank?

What Happens When You Put DEF in Your Fuel Tank? If you pour DEF into your fuel tank and realize your mistake immediately, your fuel system needs to be flushed, and there may be some part repairs or replacements required just from the fluid having been there.
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