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.
Factory price agricultural Urea N46 Fertilizer n46% granular urea fertilizer bulk 50kg bag for plant growth Cheap price
Unlock the full potential of your crops with our premium Urea N46% fertilizer, specifically designed for high-performance
agriculture. This high-nutrient fertilizer provides a powerful boost to your soil, ensuring optimal growth and yield for a variety of crops.
Product Highlights:
* Urea N46%: Contains 46% nitrogen in the form of urea, delivering a high concentration of essential nutrients that promote vigorous plant growth and increased crop productivity.
* Ammonium Sulfate 46-0-0: This specialized formulation combines urea with ammonium sulfate, offering a balanced nutrient profile that enhances soil fertility and improves nutrient uptake by plants.
* High Nutrient Content: Packed with essential nitrogen, this fertilizer supports robust leaf and stem development, leading to healthier and more productive crops.
* Enhanced Soil Health: The ammonium sulfate component aids in lowering soil pH, creating an optimal growing environment for crops and improving overall soil health.
* Cost-Effective Solution: Offering a competitive price without compromising quality, our Urea N46% fertilizer is an economical choice for farmers looking to maximize their investment in crop nutrition.
* Versatile Application: Suitable for a wide range of crops, including cereals, vegetables, and fruits, making it a versatile
addition to your agricultural practices.
Product Name
Urea Fertilizer N46
Package
25kg/50kg/1000kg Bag
Appearance
White Granualr
Color
White Color
Nitrogen
46.0% Min Urea Fertilizer
Name
Urea 57-13-6
MOQ
27 Metric Ton
Usage
Fertilzier
Sample
Freely500g-1kg
Keyword
Granular UREA N46%
Application:
1. Used as fertilizer, applied to a variety soil and crops.
2. Used in textile,leather,medicine and so on.
3. Mainly used as the raw material of BLENDING NPK.
PRODUCE
Colorless crystals or white particles. No odor. Decomposition above 280 . Solubility in water: 70.6g at 0 and 103.8g at 100 . Insoluble in ethanol and acetone. The pH of 0.1mol/L aqueous solution is 5.5. Relative density 1.77. The refractive index is 1.521. Ammonium sulfate is mainly used as fertilizer and is suitable for various soils and crops. It can also be used in textile, leather, and other fields.
Carbamide 46% Urea Fertilizer,Hot Sale Agricultural Grade Urea Fertilizer Prices
Manufacture price agriculture fertilizer Urea 46%
Urea is one kind of neutral fertilizer, which can be used in long time withou any harmful material in soil. Usually it can be used both for base and top dressing fertilizer in agriculture.
urea : Can be used in agriculture and producing BB fertilizer.
46% Urea Fertilizer Specification
Nitrogen
46.0%Min
Biuret
1.0%Max
Moisture
0.5%Max
Particle Size
0.85-2.80mm 90%Min
Physical properties
White, hygroscopic crystal prilled.
Free flowing and free from harmful substances.
Soluble in water and in liquid ammonia.
Packing
50kg /Woven bag
46% Urea Fertilizer Benefits
urea 46 is a high concentration nitrogen fertilizer. It is a neutral quick acting fertilizer and can also be used to produce many kinds of compound fertilizers. No harmful substances are left in soil, and long-term application has no adverse effects.However, urea46 the excessive temperature in the granulation will produce a small amount of biuret, which will inhibit the crops.urea 46% is an organic nitrogen fertilizer, which can be absorbed and utilized by crops after being hydrolyzed into ammonium carbonate or ammonium bicarbonate through soil urease. Therefore, urea should be applied 4~8 days before the fertilizer requirement.
Purity 46%-46.6%
Other attributes
Type UREA
Place of Origin China
Classification Nitrogen Fertilizer
Other Names Carbamide
MF CH4N2O
EINECS No. 200315-5
Application Agriculture
Product Name Urea 46%
Appearance Granules
Quality Standard GB 2440-2001
Urea Agricultural Grade (Urea 46%), granular, biuret up to 1%, origin is Uzbekistan; Minimum Order Quantity: 2000-3000MT; Packaging: bulk or big bags; Payment terms: T/T, LC; Terms of delivery: CFR/CIF-European port
Granular urea, with a 46 percent nitrogen content
Identified uses of the Intermediate, fertilizers, manufacture of substances, formulation of
substance: preparations, raw material, use as a laboratory reagent, processing aid,
manufacture of plastics, cosmetics, personal care products, ink and toners, metal surface treatment products, building and construction preparations, washing and cleaning products, water treatment chemicals, adhesives, sealants, adsorbents, products such as ph-regulators, flocculants, precipitants, neutralization agents, fillers, putties, plasters, modeling clay, anti-freeze and de-icing products, manufacture of textiles, explosives.
