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Vehicle urea is a liquid used in SCR technology to reduce nitrogen oxide pollution in diesel vehicle exhaust. Its composition is 32.5% high-purity urea and 67.5% deionized water. The urea solution for vehicles is slightly alkaline, which is irritating to the human eyes and respiratory tract. Be careful not to splash it on the eyes and skin when using it. If it accidentally splashes on the eyes or skin, rinse with water immediately. Urea aqueous solution is a high-purity transparent liquid with a faint ammonia smell. Although it is alkaline, it is non-toxic.