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.
Product Details:
Storage : Dry Place
Grade : Agriculture Grade
Supply Ability : 2500000 Kilograms Per Month
Price And Quantity
Minimum Order Quantity : 50 Kilograms
Product Specifications
Storage Dry Place : Grade Agriculture Grade
Trade Information
Payment Terms : Cash in Advance (CID)
Supply Ability 2500000 Kilograms Per Month
Delivery Time : 1 Week
Main Domestic Market : All India
Product Description
The Urea Fertilizer we are providing is an essential nutrient for crops development. It contains nitrogenous contents that are most important for plant growth. It has various industrial applications as well such as production of plastics, nutritional supplements for cattle and more. This provides plant high amount of nitrogen to promote green leafy growth and makes the plants look fresh and lush green. The Urea Fertilizer also aids in photosynthesis process of plants. It provides nitrogen, for primary growth of plants
Our premium Urea Fertilizer is a highly effective nitrogen fertilizer, perfect for a variety of agricultural and horticultural applications. Known for its high nitrogen content (46% N), urea is an ideal solution to enhance crop yield and growth, suitable for crops, trees, pastures, and lawns.
Product Features:
High Nitrogen Content: Contains 46% nitrogen, providing a powerful nutrient boost to crops, promoting lush foliage and healthy growth.
Pure and Uniform Granules: White, spherical granules with a consistent size for easy handling, application, and uniform nutrient distribution.
Water Soluble: Quickly dissolves in water, making it easy to mix with soil or apply through irrigation systems for efficient absorption.
Versatile Application: Ideal for direct application to soil, foliar sprays, or as part of a balanced fertilizer blend.
Eco-Friendly Packaging Options: Available in bulk bags and custom packaging as required.
Product Specifications:
Nitrogen Content: 46%
Moisture: <0.5%
Biuret Content: <1.0%
Granule Size: 2â??4 mm (standard); other sizes available upon request
Appearance: White, free-flowing granules
Packaging Options:
Available in 50 kg bags, jumbo bags (1000 kg), or customized packaging options to suit your needs.
Benefits:
Boosts overall plant health by providing essential nitrogen, a key nutrient for chlorophyll production and photosynthesis.
Increases crop yields and quality, making it a cost-effective fertilizer solution for large and small-scale agricultural operations.
Easily blendable with other fertilizers for balanced soil nutrition.
Application Guidelines: For best results, apply according to the specific crop requirements, season, and soil condition. Common applications include:
Topdressing: Spread directly over soil.
Foliar Spray: Dilute in water for foliar feeding.
Irrigation: Dissolve in irrigation water for efficient nutrient uptake.
Wholesale Urea Fertilizer 46% / Urea Fertilizer for Sale / Cheap Quality Urea Fertilizer
Product name: Urea
Alias: Carbonamide
Chemical formula: CH4N2O
Molecular weight: 60.06
CAS: 57-13-6
EINECS: 200-315-5
Water solubility: 1080 g/L (20â??).
Appearance: colorless or white needle-like or rod-like crystals
Application: Fertilizer
Urea, also known as carbamide, is an organic compound composed of carbon, nitrogen, oxygen, and hydrogen. It is a white crystal and one of the simplest organic compounds. It is the metabolic decomposition of protein in mammals and some fish. The main nitrogen-containing end product is also the nitrogen fertilizer with the highest nitrogen content.
As a neutral fertilizer, urea is suitable for various soils and plants. It is easy to store, easy to use, and has little damage to the soil. It is a chemical nitrogen fertilizer that is currently used in a large amount. In industry, ammonia and carbon dioxide are used to synthesize urea under certain conditions.
Agricultural applications:
Urea is a high-concentration nitrogen fertilizer, a neutral quick-acting fertilizer, and can also be used to produce a variety of compound fertilizers. No harmful substances remain in the soil, and long-term application has no adverse effects.
Animal husbandry can be used as feed for ruminants. However, excessively high temperature in granulation will produce a small amount of biuret, also known as biuret, which has an inhibitory effect on crops.
my country stipulates that the content of urea biuret used in fertilizers should be less than 0.5%. When the biuret content exceeds 1%, seed fertilizer, seedling fertilizer and foliar fertilizer cannot be used, and the urea content in other application periods should not be too much or too concentrated.
