What category does automotive urea belong to?

[OPeyton]

Automotive urea solution falls under the catalyst classification in the tax classification code. Introduction to Automotive Urea: The SCR (Selective Catalytic Reduction) solution holds significant advantages in the National IV diesel vehicle exhaust emission treatment system, and automotive urea is an essential additive for the SCR solution. With the gradual implementation of the National IV emission standards for diesel vehicles in various cities, the demand for automotive urea may experience a surge. Current Development Status: The SCR system includes a urea tank (containing diesel exhaust fluid) and an SCR catalytic reaction tank. The operation process of the SCR system is as follows: when nitrogen oxides are detected in the exhaust pipe, the urea tank automatically sprays diesel exhaust fluid. The diesel exhaust fluid and nitrogen oxides undergo a redox reaction in the SCR catalytic reaction tank, producing non-polluting nitrogen and water vapor that are then discharged.