Ammonium sulfate ammonium sulfate for agriculture is a white or light-colored crystal, nitrogen content ≥ 20.8% (secondary products). Easy to absorb moisture, easily soluble in water, when heated on fire, it can be seen slowly melting, accompanied by the release of ammonia.
Ammonium nitrate Ammonium nitrate is white in appearance with no visible impurities and may be slightly yellowish. Total nitrogen content ≥ 34.4% (Level II). Has a strong hygroscopicity and caking, a large number of ammonium nitrate easily decomposed by heat. The chemical fertilizer samples were placed directly on a red-hot iron plate and melted rapidly. They appeared boiling. When the melting process was over, there was a flare. A lot of white smoke was emitted, and there was ammonia smell and firecracker smell. It was ammonium nitrate.
Ammonium chloride ammonium chloride is white or slightly yellow crystal, soluble in water, strong in water absorption, easy to agglomerate. Heat a small amount of ammonium chloride on the fire, it can smell intense irritating odor, accompanied by white The smoke quickly melted and disappeared completely. During melting, the unmelted part appeared yellow.
Ammonium bicarbonate is white or slightly gray in appearance and has an ammonia odor. Hygroscopicity, soluble in water, with a small amount of sample to rub with your fingers, you can smell stronger ammonia odor. The chemical fertilizer samples were placed directly on a red-hot iron plate. They did not melt and decomposed directly. A lot of white smoke occurred and there was a strong ammonia smell.
The appearance of calcium phosphate is dark gray, grayish white, light yellow and loose powder. There are many small pores in the block, commonly known as "cellular eyes." Effective phosphorus pentoxide content ≥12.0% (Quality II). Some are soluble in water and the aqueous solution is acidic. Unstable when heated, visible micro smoke, and sour taste.
The appearance of calcium magnesium phosphate phosphate is grayish white, grayish green or grayish black powder, and it looks very fine. Under the irradiation of sunlight, it can be seen that crushed, vitreous-like objects are present and glittering. Effective phosphorus pentoxide content ≥12.0% (qualified products). It is insoluble in water, does not absorb moisture, and does not show changes when heated on fire.
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