According to the national standard GB29518-2013, the concentration of urea used in vehicles is within the range of 32.5%±0.7. Many people will wonder why it is 32.5% instead of other values?

In fact, the concentration of vehicle urea solution is related to its own storability and stability. The vehicle urea raw material is mixed with ultrapure water at a concentration of 32.5% to reach the freezing point temperature of -11°C, and it can still work normally. At -11℃, the vehicle urea solution will freeze but the concentration will not change.

At the same time, the concentration of 32.5% urea solution for vehicles is also required for storage. Studies have shown that at the concentration of 32.5%, the urea solution for vehicles can maintain no deposition for a long time. When the concentration is higher than 32.5%, deposition will occur at the bottom after a long storage time.

Can the concentration of urea solution for vehicles be lower than 32.5%?

The reason why the concentration of urea solution for vehicles is 32.5% is introduced above. If this concentration is not reached, it will affect the freezing point of urea solution for vehicles. Furthermore, if the concentration of urea for vehicles is too low, the effect of treating exhaust gas will be weakened. To achieve the same effect, it is necessary to The amount of urea used in the vehicle is larger, so it needs to be added frequently by the car friends. Most of the urea solution used in the vehicle is water, so the content of water increases again, which will definitely bring a lot of inconvenience in use.

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