The white precipitate in AdBlue® usually appear in winter. The AdBlue® in urea tank melt after freezing, white sediment will appear at the bottom, so the low temperature is one of the conditions for the formation of sediment.

Through the professional detection of AdBlue® with precipitate after melting, the test result shows that the main component of the white precipitate is triuret, the solubility of triuret under low temperature conditions is very low, low temperature leads to precipitation. The density of triurea is relatively large, and it will accumulate and precipitate to the bottom.

1. These white precipitates can cause the malfunction of AdBlue® detector.

At room temperature, the dehydration and crystallization of triuret causes the AdBlue® sensor of the vehicle to malfunction, the AdBlue® level detection is inaccurate. After long time, a large amount of crystals are generated in the pipeline and urea tank of the SCR system.

2. Causing the clog of AdBlue® nozzle.

AdBlue® for diesel vehicles will heat at high temperature during use, and the triuret will be condensed into cyanuric acid, which will clog the AdBlue® nozzle. The cyanuric acid has the physical properties of being slightly soluble in cold water and easily soluble in hot water.