Properties of urea
Urea, also known as carbamide, carbamide and urea. Pure urea is white, tasteless, odorless, needle shaped or prismatic crystal, with a melting point of 132.7 â?? under normal pressure. It is hygroscopic, deliquescent, hydrolyzable, and weakly alkaline. It is made into compound fertilizer with acid fertilizer. Urea is an organic compound composed of carbon, nitrogen, oxygen and hydrogen. It is a white crystal. Urea is one of the simplest organic compounds. The most important use of urea is as fertilizer. Its nitrogen content is more than 46%. After being converted into ammonium carbonate in soil, urea is hydrolyzed and absorbed by plants. It is the nitrogen fertilizer with the highest nitrogen content at present.
Molecular formula of urea: CO (NH2) 2, molecular weight 60.06, density 1.335g/cm �³ï¼? The melting point is 132.7 â??. Soluble in water and alcohol, insoluble in ether and chloroform. It is slightly alkaline. It can react with acid to form salt. It has hydrolysis. Condensation reaction can be carried out at high temperature to produce biuret, triuret and cyanuric acid. Heat to 160 â?? and decompose to generate ammonia gas and turn into cyanic acid at the same time. Urea can be hydrolyzed into ammonia and carbon dioxide under the action of acid, alkali and enzyme (acid and alkali need to be heated). Unstable to heat, heat to 150 â??ï½? 160 â?? to deamination to biuret. Urea is easily soluble in water, 105g can be dissolved in 100ml water at 20 â??, and the aqueous solution shows neutral reaction. There are two kinds of urea products: crystalline urea is white acicular or prismatic crystal with strong hygroscopicity; Granular urea is a translucent particle with a particle size of 1~2mm, which has a smooth appearance and improved moisture absorption.
Urea is a physiologically neutral fertilizer, which does not leave any harmful substances in the soil and has no adverse effects after long-term application. However, a small amount of biuret, also known as biuret, will be produced when the temperature is too high during granulation, which has an inhibitory effect on crops. Urea is molecular before conversion and cannot be adsorbed by soil, so it should be prevented from being lost with water; The ammonia formed after conversion is also volatile, so urea should also be deeply covered with soil. Urea is the first synthetic organic substance and widely exists in nature, such as 0.4% urea in fresh human feces.
The new version of national standard GB/T2440-2017 for urea has been officially implemented since July 1, 2018. Compared with the replaced 2001 standard, certain adjustments have been made.
New standard GB/T2440-2017
CASå?·:57-13-6 Urea for vehicles, agricultural urea, urea N46ï¼?
When the temperature of urea is below 20 â?? and the relative humidity is below 70%, it will not only not absorb moisture, but also evaporate water and reduce its water content; When the temperature exceeds 20 â?? and the relative humidity is higher than 80%, it starts to absorb moisture, and becomes paste when it is serious. When the air is dried again, it will re agglomerate, which is only inferior to ammonium nitrate. When the urea aqueous solution is at 80 â??, hydrolysis and decomposition reactions will occur, forming ammonium carbamate, ammonia gas and carbon dioxide respectively. Under acid and alkaline conditions, urea will decompose faster when it is heated. Urea is easy to combine with straight chain carbohydrates to form crystalline additional compounds; It forms a variety of double salts with various inorganic compounds, such as Ca (NO3) 2 �· 4CO (NH2) 2, NH4Cl �· CO (NH2) 2, CaChemicalbookSO4 �· 4CO (NH2) 2, MgSO4 �· 4CO (NH2) 2 �· 3H2O, Mg (NO3) �· 4CO (NH2) 2 �· 2H2O, etc; It is easy to form urea phosphate, dicalcium phosphate and water with monocalcium phosphate, namely Ca (H2PO4) 2 �· H2O+CO (NH2) 2 â?? H3PO4 �· CO (NH2) 2+CaHPO4+H2O; With nitric acid, it is easy to form urea nitrate, CO (NH2) 2+HNO3 â?? CO (NH2) 2 �· HNO3, which combines and relaxes the two; It can combine with formaldehyde to form urea formaldehyde compounds (uric acid rubber shrinks), in which the higher proportion of formaldehyde is urea resin, and the lower proportion is slow-release (effective) urea.
UREA is a spherical white solid. It is an organic amide molecule containing 46% nitrogen in the form of amine groups. UREA is infinitely soluble in water and is suitable for use as an agricultural and forestry fertilizer as well as for industrial applications which require a high quality nitrogen source.
item Agriculture grade Urea
CAS no. 57-13-6
Other name Carbamide
MF CH4N2O
EINECS 200-315-5
Place of Origin China
Purity â?¥46%
Appearance white granule
Application fertilizer
Size 0.85-2.8mm, 1.18-3.35mm, 2.00-4.75mm, 4.00-8.00mm
Applications
1.Medical field
Dermatology uses certain agents containing urea to increase the humidity of the skin. Non-surgical removal of nails uses occlusive dressings that contain 40% urea.
2.Agriculture
Urea is a highly concentrated nitrogen fertilizer, which is a neutral fast-acting fertilizer, and can also be used to produce a variety of compound fertilizers. No harmful substances remain in the soil, and there are no adverse effects after long-term application. Animal husbandry can be used as feed for ruminants. However, if the temperature is too high in granulation, a small amount of biuret will be produced, also known as biuret, which has an inhibitory effect on crops. China stipulates that the content of urea biuret for fertilizer should be less than 0.5%. When the content of biuret is more than 1%, it can not be used as seed fertilizer, seedling fertilizer and foliar fertilizer, and the urea content in other application periods should not be too much or too concentrated.
3.Industrial sector
It can be used in large quantities as a raw material for the production of melamine, urea-formaldehyde resin, hydrazine hydrate, tetracycline, caffeine, reduced brown BR, phthalocyanine blue B, phthalocyanine blue Bx, monosodium glutamate and other products.
4.Laboratory applications
Urea is very effective at denaturing proteins, especially non-covalently bonded proteins. This feature can improve the solubility of certain proteins at concentrations of up to 10 mol/volume. Urea can also be used to make urea nitrate.
GERMALL PLUS is a combination of Diazolidinyl Urea and IPBC pre-dissolved in Propylene Glycol for ease of use. This combination exhibits a synergistic preservative effect, which reduces the total active preservative level necessary; provides for complete, broad spectrum preservation against Gram-positive and Gram-negative bacteria, yeast, and mold.
Compatible with most cosmetic raw materials.
Can be used in a wide variety of leave-on and rinse-off personal care formulations for reliable preservation.
Recommended use levels in a finished formulation is 0.1-0.5%.
Add at 50�°C or below during the cool down stage of processing.
Every cosmetic formulation requires a specific preservative system to meet its individual needs. Therefore, every newly developed or modified product should be challenge tested to assure preservative efficacy.
Urea is one kind of neutral fertilizer, which can be used in long time without any harmful material in soil. Usually it can be used both for base and top dressing fertilizer in agriculture. urea contains prilled urea and granular urea .
Prilled urea : gas based and coal based ; coated and uncoated; agriculture and industry grade
Granular urea : Can be used in agriculture and producing BB fertilizer and sulfur coated urea.
Urea is a raw material forthe manufacture of twomain classes of materials:urea-formaldehyde resins
and urea-melamine-formaldehyde used in marineplywood.
AGRICULTURE
More than 9O% of world industrial production of urea is destined for useas a nitrogen-release fertilizer.
Urea has the highest nitrogen con-tent of all solid nitrogenous fertilizersin common use.
Therefore, it has the lowest transpor-tation costs per unit of nitrogen nutri-ent
Nitrogen
46% min
Biuret
1.0% max
Particle size
2.00-4.75mm 90%min
Moisture
0.5% max
Appearance
green, yellow, free flowing,free from harmful substances
If interested, please do contact with us for more details,product photos,product availability ,shipment time.
we accept long and short term contracts.
Please Kindly Contact Us With Your Email Address For More Information.
The chemical fertilizer Urea, npk contains midium Potassium and low Phosphorus in proportions. The nutrients are long and slow released and supplied. The pure natural Sulphate Potassium we added into the fertilizer is from Lop Nor Lake, which is a token of high quality.
2. Features
1) Upgraded nutrition: abundant inorganic nutrients, combined with premium organic nutrients, make extraordinary fertilization.
2) Disease resistance: the chelated trace elements are able to reduce nutrient deficiency diseases.
3)Root developing and soil enriching: the imported humic acid and amino acid will help rooting and soil enriching.
3. Application Range
It is used for all fruit trees and vegetables.
4. Appliction Method and Amount
It is used as base fertilizer and additional fertilizer, 40-80 kg per acre. Improper handling will cause injury for crops because of biuret. Keep separate with seeds.
5. Packing and Storage
1. Description of Urea Fertilizer 46 Nitrogen
UREA is a spherical white solid. It is an organic amide molecule containing 46% nitrogen in the form of amine groups. UREA is infinitely soluble in water and is suitable for use as an agricultural and forestry fertilizer as well as for industrial applications which require a high quality nitrogen source. It is not a poison to mammals and birds and is a benign and safe chemical to handle.
2. Advantages of fertilizer urea
Urea can be applied to soil as a solid or solution or to certain crops as a follar spray.
Urea usage involves little or no fire or explosion hazard.
urea's high analysis , 46 % N, helps reduce handling , storage and transportation costs over other dry N forms.
Urea manufacture releases few pollutants to the environment.
Please store at cool and dry place. No swallowing.
Product descriptions from the supplier
We are the largest Manufacturers of A4 Copy Papers in Thailand, Copy Paper, A4 Print Paper, Double A4 Paper, A4 Copy Paper, A4 Papers, A4 Paper Wrapping Machine, Paper A4, A4 Paper Sheeter,
Started as a small paper mill, now we run operations across Thailand right across the world with an annual combined pulp, paper, packaging product and converting capacity of over 19 million tons per annum. Today, We are suppliers of copier paper in world markets, our products are found in more than 120 countries across six continents Europe, North America, South America, Asia, Africa, Australia.
We Manufacture Multipurpose Paper of the following specification.
Gramage: 80gsm, 75gsm, 70gsm
Quality: Imported 100% Natural Wood Pulp
Brightness = 102-104%,Natural White
Capability: High Speed Copying100ppm, Laser
Capable,Inkjet Capable, Fax Capable.
Thickness: 103-110 um
Surface roughness TS ml/min: 75-175
Surface roughness BS ml/min: 100-200
Bending stiffness MD: >110 Mn
Bending stiffness CD: >50 Mn
CIE whiteness: 148-152 or 152-165
Cobb Test: 27-33 g/m2 27-33
Two-sided usage gives the paper sheet high opacity.
Smooth paper surface makes sharp printing and copying.
Moist protected wrapper
Size:
International standard
A4: 210 x 297mm
A3: 420x 297mm
8.5 x 11-inch (216 x 279mm)
8.5 x 14-inch (216 x 330mm)
Key Performance:
No jam in photocopy machine
No double feed
Stay flat after copying
Leave no dust in the copy-machine
Nice appearance-white and clean
Nice touch-smooth and bulky
No see through-print both sides
Been developed for: Photocopy Machines, Laser Printers, Ink-jet Printers, Fax Machines
Features and Benefits:
Perfect for high-quality printing and copying
Super high whiteness produces outstanding clarity and contrast for all graphics and text
Precision-cut edges for trouble-free performance
User-friendly box design with built-in handle for easy carrying, tear slot perforation for easy access to the reams and label for filing
Outstanding Packaging
Standout/premium.
Special protective/moisture - proof wrapper.
Economic box
PACKING DETAILS
500 SHEETS PER REAM.
5 REAMS PER BOX.
1560 BOXES PER 20FT CONTAINER (WITH PALLET).
1600 BOXES PER 20FT CONTAINER (WITHOUT PALLET).
7800 REAMS TOTAL IN ONE 20FCL (WITH PALLET).
8000 REAMS TOTAL IN ONE 20FCL (WITHOUT PALLET).
FOR MORE INFO ON OUR PRODUCT, CONTACT US WITH YOUR FULL AND COMPLETE CONTACT INFO SO WE CAN SEND YOU ALL DETAILS FOR A BETTER COMMUNICATION AND BUILDING A LONG TERM BUSINESS RELATIONSHIP.
We are producing granular urea 46 and can provide it to you. Our monthly output in Dalian is 70000 tons of chemical fertilizer. At present, the global chemical fertilizer is facing a serious shortage. In another month, we will start to raise the price significantly'
PRILLED UREA
Nitrogen: 46% min
Biuret: 1% max
Moisture: 0.5% max
Particle Size(0.85-2.80mm): 90% min
Color: white
Uncoated, Free flowing, Free from harmful substances.
Under the combined effect of Adble and SCR technology, it can optimize engine performance and fuel consumption, reduce diesel consumption, which can be as high as 5%-7%, significantly reduce costs, the average consumption of urea is 3%-5%of diesel consumption.
Adblue is added to the tank to reduce emissions of NOx from diesel vehicle exhaust and meet the requirements of the countryâ??s 4 emission standard truck without Adblue, the emissions of nitrogen oxides is 4 times higher, while added Adblue vehicles more powerful.
Under the combined effect of Adble and SCR technology, it can optimize engine performance and fuel consumption, reduce diesel consumption, which can be as high as 5%-7%, significantly reduce costs, the average consumption of urea is 3%-5%of diesel consumption.
Adblue is added to the tank to reduce emissions of NOx from diesel vehicle exhaust and meet the requirements of the country's 4 emission standard truck without Adblue, the emissions of nitrogen oxides is 4 times higher, while added Adblue vehicles more powerful.
Features:
1.Total nitrogen content as high as 38%-40% of solid, 22-28% of liquid.
2.Sustained release period of 30-180 days, released by microbial decomposition, stable release properties.
3.Low salinity index, high safety, to avoid burning plants.
4.powder, granular, liquid three types to meet different needs.
5.less nutrient loss, high utilization.
Application note:
A classic fertilizer with a stable release nitrogen fertilizer. It is mainly used as a raw material for various organic-inorganic compound fertilizers or directly mixed with other fertilizers.
Widely used in lawns, crops, fruit trees, tea and other crops
The DDSY1088 single phase split type keypad meter measures total active energy. It is STS certified and complies with the standards of IEC62052, IEC62053, IEC62055, and IEC62056. The Measurement and Control Unit (MCU) is DIN standard complied and can be installed into the meter box to prevent unauthorized operation. The Customer Interface Unit (CIU) is installed in the Customerâ??s house to recharge and monitor MCU.
FEATURES
1.Easily configurable Prepaid & Postpaid mode by token
2.Reverse energy measured in forward
3.Easily configurable user friendly kWh
4.Configurable LCD displaying items
5.Programming reading by optical and SCSSCAAA9 port (Optional)
6.Wired, PLC or RF communications between MCU and CIU
7.Real time measures voltage, current, frequency, active power, etc
Uses used as a formaldehyde capture agent, to remove residual formaldehyde in 2d-resin, kb resin, urea formaldehyde resin, melamine formaldehyde resin finishing fabric. The product is also used as a fine chemical intermediates for the manufacture of resins, plasticizers, painting, adhesives and so on.
Use as a formaldehyde capture agent, fine chemicals intermediates, but also for resin and plasticizer, painting, adhesives, etc.
Use for the synthesis of chiral microporous materials prepared from achiral precursors; for the preparation of aryl and heteroaryl n-acylureas by microwave-assisted palladium-catalyzed carbonylation reactions; for the synthesis of a human neutrophil- a highly water-soluble peptide of a cell-elastase inhibitor; formed by a cyanoacetylation reaction for the synthesis of an antibacterial heterocycle; for the pd-catalyzed reaction of a cn bond with a heteroaromatic tosylate; of the oxidative amidation reaction.
Prilled Urea 46% , Granular Urea N46% from China with good prices
Urea Specification
Appearance : White Granular / White Prills
Nitrogen : 46%min
Biuret: 1.0%max
Moisture 0.5%max
Size Granular :2.2-4.75mm, Prill Urea 0.85-2.8mm
Origin: China
