Prilled Urea 46% Min

Urea

EINECS NO.：200-315-5

MOLECULAR FORMULA：CO(NH2)2

MOLECULAR WEIGHT：60.06

Features：It is a white crystal, industrial or agricultural products for the white color with a slight red solid particles, no odor and tasteless. Nitrogen content is about 46.67%. Density 1.335g/cm3. Melting point 132.7℃. Soluble in water, alcohol, insoluble in ether, chloroform. Weakly alkaline

Urea, also called carbamide (because it is a diamide of carbonic acid), is an organic compound with chemical formula CO(NH2)2. This amide has two amino groups (–NH2) joined by a carbonyl functional group (–C(=O)–). It is thus the simplest amide of carbamic acid.

CO(NH2)2, urea only contains carbon, hydrogen, oxygen and nitrogen. It is white crystal.

The nitrogen content is about 46.7%.

One of the simplest organic compounds, it is the major nitrogen-containing end product of protein metabolism in mammals and some fish.

It is also the nitrogen fertilizer with the highest nitrogen content currently.

Product types：

Package：Packed in PP woven bags with PE film liner. Net weight of each bag: 25kgs, 50kgs, 1000kgs.

Storage：Store in dry and cool house with package sealed and away from moisture, protect the material from rain and insolation during transportation

Application：

1.Agriculture: can be used as base fertilizer, additional fertilizer and seed fertilizer. Urea is suitable to all kinds of crops and soils. It can be applied in both early spring and during the vegetation.

2.Medicine: Dermatology to improve the skin’s moisture with some drugs containing urea; occlusive dressings is used in non surgical removal of the nails, containing 40% urea; test the presence of Helicobacter pylori of C14 breath test, use of the containing carbon 14 or carbon-13 labeled urea.

3.Industry: it is good use in the steel, stainless steel chemical polishing; in pickling of metal used as a corrosion inhibitor; but also for palladium activation solution preparation.

What is the percentage of nitrogen in urea?

The nitrogen content percentage of urea is 46.3%.

The nitrogen content percentage of urea is generally 0.46.

One ton of urea contains 466.7 kilograms of nitrogen and requires about 2.6 tons of ammonium bicarbonate.

46%, good water solubility, quick-acting fertilizer.

The nitrogen content of urea is 46.3%, it is easily soluble in water, has high nitrogen content and is effective quickly.

The national standard stipulates that the nitrogen content of urea is N≧46%.

The normal nitrogen content of urea is greater than or equal to 46%.

Applications

Agriculture

More than 90 percent of world urea production is destined for use as a nitrogen-release fertilizer. Urea has the highest nitrogen content of all solid nitrogenous fertilizers in common use (46.7%). Therefore, it has the lowest transportation costs per unit of nitrogen nutrient.

In the soil, it hydrolyses back to ammonia and carbon dioxide. The ammonia is oxidized by bacteria in the soil to nitrate, which can be absorbed by the plants. Urea is also used in many multi-component solid fertilizer formulations. Urea is highly soluble in water, therefore, very suitable for use in fertilizer solutions (in combination with ammonium nitrate: UAN), e.g., in ‘foliar feed’ fertilizers. For fertilizer use, granules are preferred because of their narrower particle size distribution, an advantage for mechanical application.

The most common impurity of synthetic urea, biuret, must be present at less than 2 percent of the time, as it impairs plant growth.

Urea is spread at rates between 40 and 300 kg/ha, but actual spreading rates will vary according to farm type and region. It is better to make several small to medium applications at intervals to minimize leaching losses and increase efficient use of the Nitrogen applied, compared with single heavy applications. During summer, urea should be spread just before, or during rain to reduce possible losses from volatilization (process wherein nitrogen is lost to the atmosphere as ammonia gas). Urea should not be mixed with other fertilizers, as problems of physical quality may result.

Because of the high nitrogen concentration in urea, achieving an even spread is important. The application equipment must be calibrated correctly and used properly. Drilling must not occur on contact with or close to seeding due to the risk of germination damage. Urea dissolves in water to be applied as a spray or through irrigation systems.

In grain and cotton crops, urea is often applied at the time of the last cultivation before planting. In high rainfall areas and on sandy soils (where nitrogen can be lost through leaching) and where good in-season rainfall is expected, urea can be side or top-dressed during the growing season. Top-dressing is also popular on pasture and forage crops. In cultivating sugarcane, orea is side-dressed after planting, and applied to each ratoon crop.

For irrigated crops, urea can be applied dry to the soil, or dissolved and applied through the irrigation water. Urea will dissolve in its own weight in water, but it becomes increasingly difficult to dissolve as the concentration increases. Dissolving urea in water is endothermic, causing the temperature of the solution to fall when urea dissolves.

When preparing urea solutions for fertigation (injection into irrigation lines), dissolve no more than 30 kg of urea per 100 L of water.

In foliar sprays, 0.5 to 2.0 percent concentrations of urea are often used for horticultural crops. As urea sprays may damage crop foliage, advice for specific amounts should be sought before use. Low-biuret grades of urea should also be used if urea sprays are to be applied regularly or to sensitive horticultural crops.

Like most nitrogen products, urea absorbs moisture from the atmosphere. Therefore it should be stored either in closed/sealed bags on pallets, or, if stored in bulk, under cover with a tarpaulin. As with most solid fertilizers, it should also be stored in a cool, dry, well-ventilated area.

Chemical industry

Urea is a raw material used in the manufacture of many important chemicals, such as:

Various plastics, especially the Urea-formaldehyde resins

Various adhesives, such as Urea-formaldehyde or the urea-melamine-formaldehyde used in marine plywood

Potassium cyanate, another industrial feedstock

Urea nitrate, an explosive

Urea has the ability to trap many organic compounds in the form of clathrates. The organic compounds are held in channels formed by interpenetrating helices comprising of hydrogen-bonded urea molecules. This behavior can be used to separate mixtures, and has been used in the production of aviation fuel and lubricating oils, and in the separation of paraffin.

As the helices are interconnected, all helices in a crystal must have the same molecular handedness. This is determined when the crystal is nucleated and can thus be forced by seeding. The resulting crystals have been used to separate racemic mixtures.

Automobile systems

Urea is used in SNCR and SCR reactions to reduce the NOx pollutants in exhaust gases from combustion, for example, from power plants and diesel engines. The BlueTec system, for example, injects water-based urea solution into the exhaust system. The ammonia produced by decomposition of the urea reacts with the nitrogen oxide emissions and is converted into nitrogen and water within the catalytic converter.

Laboratory uses

Urea in concentrations up to 10 M is a powerful protein denaturant as it disrupts the noncovalent bonds in the proteins. This property can be exploited to increase the solubility of some proteins. A mixture of urea and choline chloride is used as a deep eutectic solvent, a type of ionic liquid.

Urea can serve as a hydrogen source, for subsequent power generation in a fuel cell. Urea present in urine/wastewater can be used directly (though bacteria normally quickly degrade Urea.) Producing hydrogen by electrolysis of urea solution occurs at a lower voltage and uses less energy than by electrolysis of water.

Medical use

Urea is used in topical dermatological products to promote rehydration of the skin. If covered by an occlusive dressing, 40 percent urea preparations may also be used for non-surgical debridement of nails. This drug is also used as an earwax removal aid.

Like saline, urea injection is used to perform abortions. It is also the main component of an alternative medicinal treatment referred to as urine therapy.

The blood urea nitrogen (BUN) test is a measure of the amount of nitrogen in the blood that comes from urea. It is used as a marker of renal function.

Urea labeled with carbon-14 or carbon-13 is used in the urea breath test, which is used to detect the presence of the bacteria Helicobacter pylori (H. pylori) in the stomach and duodenum of humans, associated with ulcers. The test detects the characteristic enzyme urease, produced by H. pylori, by a reaction that produces ammonia from urea. This increases the pH (reduces acidity) of the stomach environment around the bacteria. Similar bacteria species to H. pylori can be identified by the same test in animals such as apes, dogs, and cats (including big cats).

De-Icer

Urea is a safe, non-corrosive fertilizer alternative for de-icing. The chemical is easy to use on runways and walkways as well as on landing gears and other vital parts located on the under-carriage of aircraft that must always be protected from corrosion. Airports in many areas that can’t use highly corrosive chloride salts for de-icing operations use urea as the preferred alternative.