A look at true urea is a semi-transparent, uniform-sized five-colored particle. If the surface of the particle is too bright or dark, or appears to be very reflective, it may be mixed with impurities. At this time, it will take a long time to see if you buy fake urea.
Two lookup packaging production batch number and sealing. True urea general packaging bags on the production batch number clear and positive and negative sides are stacked edge of the machine sealing; false urea packaging on the production batch number is not clear or not, and most of the use of single-line manual sealing.
Three said that the regular manufacturers of urea generally differ from the actual weight by less than 1%; whereas the false urea is very different from the standard weight.
Four touch true urea particles of the same size, not easy to agglomerate, and thus feel better; and fake urea hand touch burning sensation and tingling feel.
Five burning pure urea quickly melted on the red charcoal, white smoke, ammonia smell. If there is a fierce burning on the charcoal, a strong light, and with a "click"; or melting is not complete, it must be mixed with impurities.
Six smelters of regular urea normally have no volatile odor. Only when they are exposed to moisture or high temperature can they produce ammonia odor. If the odor is stronger under normal conditions, urea contains impurities.
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