Ammonium chloride is a white crystalline salt with a pungent ammonia odor. It's soluble in water and used as a nitrogen fertilizer, a flux in metal processing, and a component in dry cells.

Automotive urea has the advantages of low toxicity, low corrosiveness, and non flammability, and is mainly used for exhaust purification of heavy-duty diesel engines, such as large trucks and buses. On diesel vehicles, urea is typically used in conjunction with exhaust aftertreatment systems such as particulate filters (DPF) to ensure the proper functioning of the emission system and compliance with environmental standards.

Urea is a neutral quick-acting fertilizer with a chemical formula of CO(NH2)2 and a nitrogen content of up to 46%. ‌‌Urea is a white crystal that is tasteless and odorless, easily soluble in water, ethanol and benzene, and slightly soluble in ether and chloroform. The nitrogen content of urea is the highest among solid nitrogen fertilizers, which makes it a highly efficient nitrogen fertilizer. After application, no harmful substances will remain in the soil, and it has little destructive effect on the soil, so it is widely used. The application methods of urea include as a base fertilizer or topdressing. Urea is decomposed into ammonium carbonate by microbial action in the soil, and ammonium carbonate is easily absorbed by plants, so urea has a rapid fertilizer effect. However, the utilization rate of urea is low, about only 20%-30%, and most of the urea applied to the soil will be lost or volatilized with water. In order to improve the utilization rate of urea, it can be carried out by deep application in advance or foliar spraying. The method of foliar spraying of urea is simple and effective, which can make urea quickly enter the leaves and participate in various metabolic processes of crops, significantly improving the utilization rate of urea.

It promotes lush green foliage, enhances photosynthesis, and boosts crop yields. Common forms include ammonium sulfate, urea, and ammonium nitrate. While effective, excessive use can lead to environmental pollution and soil degradation.

In agriculture, ammonium sulfate is widely used as a nitrogen fertilizer, providing essential nitrogen and sulfur nutrients for plant growth.

Supply plant phosphorus, calcium, sulfur and other elements, with improved alkaline soil effect. Used as a base fertilizer, foliar application, foliar spray. Mixed with nitrogen fertilizer use, there nitrogen fixation, to reduce the loss of nitrogen. Can promote the germination of plants, root length, branching, strong and mature, can be used as raw material for the production of fertilizer.