DEF Specifications: ISO 22241

This table outlines the specific physical and chemical properties Diesel Exhaust Fluid (DEF) is required to have according to ISO 22241 specifications.

Check with your DEF Supplier for a “Certificate of Analysis” (or C-of-A) to ensure that the DEF you receive meets the quality standards of ISO 22241.

ISO 22241 Specifications

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Additional Resources

• Page: Diesel Exhaust Fluid Testing
• Blog: Common DEF Problems and How to Test for Them