Car urea shelf life is how long? Jieyang car for everyone to answer with urea manufacturers responsible person Huang online; vehicle urea with a shelf life of stored at different temperatures and change. Car urea must be stored between -5 degrees -25 degrees available. And the storage temperature is not the same in different shelf life, when the temperature exceeds 35 degrees, the vehicle must be tested prior to use of urea. Car with temperature change with urea shelf life. Vehicle urea storage Storage Temperature (℃) safe storage time (months) ≤10 11-2518 26-30 1231-35> 35 detects the vehicle before use shelf life of four national emission vehicles urea why you want to add urea car? State IV emission vehicles Add vehicle urea main role is to reduce emissions of nitrogen oxides to achieve the environmental objectives. Upgrading our country four SCR route is the route that the use of selective catalytic reduction technology. Its operation as shown, substantially into the exhaust pipe from the exhaust out of the turbine, the exhaust pipe is installed on a urea metering jet apparatus, the urea aqueous solution injected into the urea solution and the exhaust of nitrogen oxides in the SCR reactor tank redox reaction to produce nitrogen and water discharge. Automobile exhaust nitrogen oxides is not only one of the causes of acid rain, the human body has a direct harm. The role of the urea solution is, and automobile exhaust nitrogen oxides react chemically to form harmless nitrogen and water, thereby reducing vehicle exhaust emissions of toxic gases, reducing pollution.