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Detailed specifications for urea vary depending on whether it is in prilled or granular form, and whether it is for agricultural, technical, or analytical use. Key parameters generally include its nitrogen content, moisture, biuret levels, and particle size.

Common specifications for fertilizer-grade urea

Urea is a high-nitrogen fertilizer, typically supplied as white, free-flowing prills or granules. Common agricultural specifications include:
*Nitrogen content: A minimum of 46.0% is standard. This is the primary indicator of its fertilizing value.
*Moisture: A low moisture content is critical for preventing the product from caking and clumping. The maximum moisture is typically 0.5% for granular urea and can be lower for prilled urea.
*Biuret content: This is a byproduct of urea manufacturing and is harmful to plants at high concentrations. The maximum biuret content is typically kept below 1.0%.
*Particle size (granulometry): This affects how the fertilizer is handled, stored, and applied.
*-Prilled urea typically has a size range of 1 to 4 mm, with at least 90% of the material falling within this range.
*-Granular urea has a slightly larger range, often 2 to 4 mm, with similar percentage requirements.
*Physical state: White granules or prills, free-flowing, and free from harmful substances.
*Color: Standard or pure white.
*Melting point: The melting point is approximately 132C.
*Free ammonia: The maximum content is often specified at 160 ppm.

Specifications for technical-grade urea

Urea is also used for industrial applications, such as in the production of specialty pollution control solutions. While some specifications overlap with fertilizer grade, technical-grade urea may have stricter purity requirements depending on its use. For example, standards from organizations like the Bureau of Indian Standards (IS 1781) and ISO 18642 define specific requirements for technical and fertilizer grades, respectively. 

Analytical-grade urea� For laboratory use, urea must meet very high purity standards defined by pharmacopeia and chemical suppliers. For example, the Sigma-Aldrich analytical standard for urea specifies: 
Assay: (=> 98.5%) (or even higher, like 99.0-100.5% for Ph. Eur., BP, USP).
Impurities: Very low levels of water and other impurities.
Melting point: A specific, narrow range, such as 132-135C.

Key differences between prilled and granular urea 

While both are common forms of fertilizer, their physical properties differ:
*Prills: Smaller, rounder particles with a diameter around 2 mm.
*Granules: Larger particles, typically 3-4 mm, which are harder and more resistant to crushing. Granular urea may be preferred for bulk blending and mechanical application due to its size and strength.

Product Description
Greater than 90% of world industrial production of urea is destined for usage as a nitrogen-release plant food. Urea has the greatest nitrogen content of all solid nitrogenous plant foods in common usage. Consequently, it has the most affordable transportation costs per unit of nitrogen nutrient.
Many soil microorganisms possess the enzyme urease, which militarizes the conversion of the urea to ammonia or ammonium ion as well as bicarbonate ion, thus urea fertilizers China� are extremely swiftly transformed to the ammonium form in soils. Amongst soil germs recognized to lug urease, some ammonia-oxidizing bacteria (AOB), such as species of Nitrosomonas, are additionally able to take in the carbon dioxide released by the reaction to make biomass using the Calvin Cycle, and also harvest power by oxidizing ammonia to nitrite, a procedure described nitrification. Nitrite-oxidizing bacteria, specifically Nitrobacter, oxidize nitrite to nitrate, which is extremely mobile in dirts because of its unfavorable cost as well as is a major reason for water pollution from farming. Ammonium and also nitrate are conveniently absorbed by plants, as well as are the leading resources of nitrogen for plant development. Nitrogen Fertilizer wholesale� is likewise used in lots of multi-component solid fertilizer formulas. Urea is extremely soluble in water as well as is, for that reason, additionally really appropriate for usage in fertilizer solutions e.g., in 'foliar feed' plant foods. For fertilizer usage, granules are preferred over prills as a result of their narrower fragment size distribution, which is a benefit for mechanical application.
urea fertilizer wholesaler� Application
Urea is typically spread at prices of between 40 and 300 kg/ha however prices vary. Smaller applications sustain reduced losses because of leaching. Throughout summertime, urea is commonly spread prior to or during rainfall to lessen losses from volatilization (process wherein nitrogen is shed to the environment as ammonia gas). Urea is not suitable with various other plant foods.
Due to the high nitrogen concentration in urea, wholesale Nitrogen Fertilizer� is extremely crucial to attain an even spread. The application tools need to be correctly calibrated and correctly utilized. Exploration should not occur on contact with or close to seed, because of the danger of germination damages. Urea liquifies in water for application as a spray or through irrigation systems.
In grain and also cotton crops, urea is frequently applied at the time of the last cultivation prior to planting. In high rains areas and on sandy dirts (where nitrogen can be lost through leaching) as well as where excellent in-season rainfall is expected, urea can be side- or top-dressed during the growing period. Top-dressing is likewise preferred on field and also forage crops. In cultivating sugarcane, urea is side-dressed after planting, as well as related to each ratoon plant.

Chemical  Raw Material for Spray Urethane and Spray Urea, Yourun's products include:
Polyurethane/Polyurea Catalysts
Defoamer (Defoaming Agent)
Rheological Agent
Anti-abrasion Agent (Anti-wearing Agent)
Antistatic Agent.
Main Advantages of the Spray Urethane and Spray Urea:
Two component spray polyurethane/urea chain extender components contains polyol (usually PPG) which has the similar reaction rate with MDI as that of H2O. If catalysts such as organic bismuth tin, which have a strong catalytic effect on water (sensitive to moisture), are selected, even if the raw materials are completely dehydrated, it cannot avoid adverse phenomena such as foaming, bulging, peeling, and cracking caused by the reaction of trace moisture with isocyanates to produce CO2� when constructs on high-temperature summer and humid substrates.
CUCAT-HA02 has unique targeted catalytic properties and extremely high catalytic activity that do not catalyze the reaction of trace moisture with isocyanates. It is used for spraying polyurethane/urea coatings and has the following prominent characteristics:
The gel� is dense and has higher strength without bubbles.� Generally, the strength is increased by 10 to 30% compared to using tin bismuth catalysts.
Improve the undesirable� phenomenon of hollowing and peeling, and improve the adhesion fastness between the coating and the base surface.� It greatly reduce the influence of wet substrate and water vapor on the coating under high temperature and high humidity conditions, and avoid the problem of hollowing and peeling caused by gas accumulation at the bonding interface caused by the use of organic bismuth catalyst.
The formula is flexible in material selection� to further reduce the cost.� Minimize the use of expensive amine terminated polyether and aromatic amine (DETDA / E100). Allow more PPG to be used in the formula, even allow the use of low activity diamines such as MOCA to replace DETDA as component P, and there will be no adverse phenomena such as foaming and bulging. While the use of ordinary bismuth catalyst to reduce the amount of DETDA or MOCA is very easy to foaming and bulging.
High catalytic activity, low usage, fast increase in viscosity and initial strength.
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Urea 46 is a nitrogen fertilizer widely used in agricultural applications. Our Urea 46 is sourced from reliable suppliers and, with its high nitrogen concentration, is an ideal product for promoting plant growth and increasing harvest yield.

Urea 46 is a white granular product with a long shelf life. It is water-soluble, therefore easily absorbed and applied by plants. Our Urea 46 is available in various packaging options to suit customer needs.

Urea 46 is suitable for use in a variety of plant and soil types, including cereals, vegetables, oilseeds, fruits, and turf. It is an efficient method for providing plants with the necessary nitrogen they require.

Premium SOCAR Urea 46 Nitrogen Fertilizer Carbamide is a highquality SGS and ISO certified agricultural fertilizer produced at SOCAR Chemical Plant Azerbaijan Suitable for wheat cereals and all field crops designed for commercial farmers large agricultural companies and international distributors who demand consistent quality

Technical Specifications

Nitrogen N Content 46 minimum

Moisture 05 maximum

Biuret 10 maximum

Free Ammonia 160 PXT PPM maximum

Harmful Substances 100 free

Radiation Nonradioactive

Color Pure white Standard white

Granulation 14 mm 90 min

Odor Odorless

Melting Point 132C

Physical State Solid granules at 20C 101 kPa

Specific Gravity 135 tm at 20C

Molecular Weight 6006 gmol

Solubility Highly soluble in water

pH 10 solution 7595

Packing
Available in 900 kg jumbo bags bigbag 8001000 kg or 50 kg bags by request

Origin Azerbaijan SOCAR Chemical Plant

Certifications

SGS Certificate of Analysis

ISO conformity

Laboratory test on every batch

Logistics Delivery

Bulk loading direct from Turkish port FOB 395440MT Turkey

Fast loading reliable supply schedule

Minimum order quantity 1000 MT

Applications

Wheat cereals field crops

Agricultural companies and international distributors

Premium quality preferred by clients in 50 countries

Premium grade consistent quality

SGSISO certified reliability

Fast and secure international logistics

Worldwide trusted SOCAR brand