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.
The chemical name of urea is called carboacyl diamine.
Molecular formula: CO(NH2)2, urea (urea/urea solution) is soluble in water .Urea particles are spherical white solids.
The relative molecular weight is 60.06, melting point is 132.7 C.
Soluble in water, ethanol and benzene, slightly soluble in ether, insoluble in chloroform.
CAS:57-13-6.
This product can be directly prepared with high-purity water to obtain qualified vehicle urea solution.
Ureu is the kind of chemical fertilizers contains the nitrogen 46%.
Urea is a good neutral fertilizer, suitable for a variety of soil and various crops.
In irrigated crops, urea can be applied dry to the soil, or dissolved and applied through the irrigation water.
1) Main ingredients:
Nitrogen >46%
2) Color: white
3) Solubility: 100%
4) Type of release: short time
Supplier From
Hong Kong,
South Korea (Republic Of Korea)
Supplier: Russia and non russia oil and gas (kazakhstan, qatar, netherlands) oil and gas products such as en590 10ppm, d6, jet fuel a1 & 54, lng, lco, ago, d2, espo, pet coke, sulphur, urea 46 granular/prilled and others,
in addtion, nitrile gloves, face mask, covid testing kits, and other ppe products to overseas including the usa & europe & other countries.
Nitrogen Content: 46% minimum
Moisture: 0.5% max
Free Ammonia: 160 PXT PPM max
Biuret: 1.0% max
Harmful Substances: 100% free from harmful substances
Melting Point: 132C
Granulation: 1mm to 4mm, 90% minimum
Color: White (Standard or Pure White)
Odor: Odorless
Boiling Point: Decomposes before boiling
Radiation: Non-radioactive
Physical State: Solid, white granules (at 20C, 101 KPA)
Specific Gravity: 1.35 t/m (at 20C)
Floatability in Water: Sinks and dissolves easily
Molecular Weight: 60.065
Product Description:
Urea N46 Automotive Grade is a high-quality urea specifically designed for use in Diesel Exhaust Fluid (DEF), which helps reduce nitrogen oxide (NOx) emissions from diesel engines. With a nitrogen content of 46%, this urea ensures efficient reduction of harmful emissions in compliance with global environmental regulations. Urea N46 is also widely used in Selective Catalytic Reduction (SCR) systems in modern diesel vehicles, making it a critical component in emissions control.
Key Benefits:
Emission Control: Ensures compliance with strict environmental standards by reducing harmful nitrogen oxides (NOx) in diesel exhaust systems.
High Purity: With a biuret content of just 1.0% max and no harmful substances, Urea N46 is safe for use in sensitive automotive systems.
Performance Efficiency: Optimal granulation ensures consistent and even usage in SCR systems, promoting smooth engine performance and longevity.
Safe and Reliable: Non-radioactive and odorless, making it safe for transportation and use.
Applications:
Diesel Exhaust Fluid (DEF) for trucks, buses, and other diesel-powered vehicles.
Selective Catalytic Reduction (SCR) systems in modern diesel engines.
Suitable for both on-road and off-road vehicles, including commercial fleets, construction machinery, and agricultural equipment.
Packaging and Shipping: Available in various packaging sizes to suit your needs. We offer bulk shipments for industrial use and smaller quantities for retail and distribution. Contact us for customized packaging and delivery options.
Why Choose Us?
Our Automotive Grade Urea N46 is manufactured to the highest industry standards, ensuring reliability, purity, and performance. We provide prompt shipping and exceptional customer support to meet your automotive emission control needs.
Product: Urea N46 GRANULAR AND PRILLED
Product Grade: Standard Export Grade
Quantity (MOQ): 12,500MT
LENGTH OF CONTRACT: SPOT & 12 MONTHS WITH R&E
OFFER PRICE: /MT
PORT OF DISCHARGE: CIF ASWP
Inspection: Internationally Accepted Agency Preferably SGS
Origin: Both Russia and NON-Russia
Payment Term: LC/DLC/SBLC/TT
