API Certificate

American Petroleum Institute
def_bottom_logo (1).jpgThe American Petroleum Institute (API) runs a voluntary program for certifying DEF producers and distributors through its Diesel Exhaust Fluid Certification Program. Suppliers who have been approved by the API display its logo on their DEF products, guaranteeing the quality of your purchase and its suitability for proper SCR operation.

Click to view USA API Certificate

ISO standard
The production, handling and transportation of Diesel Exhaust Fluid (DEF) is governed by the ISO 22241 standards. The key points are:
Diesel Exhaust Fluid (DEF) must have a urea concentration of 32.5% by weight. This concentration was chosen because it is has the lowest freezing temperature, 12°F. The maximum level of impurities such as calcium and various metals such as iron, copper, zinc and aluminum are clearly specified. These limits are very low, to ensure reliable operation of the SCR system.
This definition excludes the use of urea grades used in agriculture, and requires water purified by distillation or deionization or similar.

The ISO standards are available for purchase for a small fee from the ISO website.


Get The Facts on DEF [Diesel Exhaust Fluid]

What is Diesel Exhaust Fluid? How much does DEF weigh? Is DEF corrosive? How many miles can my truck travel on one gallon of DEF?  Find answers to all of your important Diesel Exhaust Fluid (DEF) questions here.





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