Price of urea in Fangchenggang

The C-14-breath test to test the presence of Helicobacter pylori used urea containing C-14 or C-13 markers. Because the urease of Helicobacter pylori uses urea to produce ammonia to increase the pH value in the surrounding stomach. The same principle can also be used to test similar bacteria living in the stomach of animals.

In order to adjust the flower amount, in order to overcome the big and small year of apple field, in the small year, spray 0.5% urea aqueous solution on the leaf surface 5-6 weeks after flowering (the critical period of apple flower bud differentiation, the growth of new shoots is slow or stopped, and the nitrogen content of leaves shows a downward trend), spray twice continuously, can increase the nitrogen content of leaves, accelerate the growth of new shoots, inhibit flower bud differentiation, and make the flower amount suitable in the big year.

Urea iron fertilizer Urea forms chelated iron with Fe2+in the form of complex. The organic iron fertilizer has low cost and good effect on preventing iron deficiency and chlorosis. In addition, when 0.3% ferrous sulfate is sprayed on the leaves, 0.3% urea is added, which is better than that of 0.3% ferrous sulfate alone.

Industrial field

It can be widely used as the raw material for the production of melamine, urea formaldehyde resin, hydrazine hydrate, tetracycline, phenobarbital, caffeine, reduced brown BR, phthalocyanine blue B, phthalocyanine blue Bx, monosodium glutamate and other products.

In industry, it is also used as raw material for manufacturing urea formaldehyde resin, polyurethane and melamine formaldehyde resin. When the urea is heated to 200 ℃, it generates solid melamine (i.e. cyanuric acid). The derivatives of cyanuric acid trichloroisocyanuric acid, sodium dichloroisocyanate, tri (2-hydroxyethyl) isocyanate, tri (allyl) isocyanate, tri (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanate, triglycidyl ether of isocyanate, and melamine complex of cyanuric acid have many important applications. The first two are new disinfection and bleaching agents. The total production capacity of trichloroisocyanuric acid in the world exceeds 80000 tons.

Urea is a very useful moisturizing ingredient. It exists in the cuticle of the skin and is the main component of the natural moisturizing factor NMF of the skin. For the skin, urea has the effect of moisturizing and softening the cutin, so it can also prevent the cuticle from blocking the pores, thereby improving the problem of acne. It is used to add moisturizing ingredients in facial mask, skin care lotion, cream, hand cream and other products. The addition ratio is 3-5%.