Urea 46 Specifications: What Buyers Should Check Before Contracting

What Is Urea 46?

Urea is a high-nitrogen fertilizer. The “46” in Urea 46, also described as urea N46, refers to approximately 46% nitrogen by weight. For the product specification below, the stated minimum is 46% w; the grade name alone is not a substitute for that limit.

The familiar 46-0-0 grade notation describes nitrogen, phosphate and potash. Its concentrated nitrogen content is useful to agricultural buyers planning nutrient supply and bulk transport, which helps explain its international trade. A shared grade name does not make material from every source physically identical.

Granular Urea 46 Specification

The table records the approved Granular Urea fertilizer reference specification for this article. MatinTouch currently offers granular form only. These granular urea specifications should be checked against the actual offer and agreed contract; they are not a blanket guarantee for every shipment or origin.

Use the granular urea specification as a comparison sheet, keeping every unit, test method and qualification attached to its value. In-house method identifiers are reproduced as provided, not represented as independent certification.

On a narrow screen, scroll the table horizontally. Values and method identifiers are preserved as supplied; “% w” denotes percentage by weight. Minimum, maximum and ranges are different criteria. Rows marked “Reference physical property” have no stated acceptance limit.

Why Nitrogen Content Matters

The specified Total Nitrogen content is Minimum 46% w, tested using ISO 5315, ISIRI 75. Nitrogen concentration is central to the nutrient quantity purchased: comparing tonnes of fertilizer without comparing the nitrogen basis can obscure what the offer represents.

The CoA should report the result and method for the identified material. Confirm whether the contractual measurement basis matches the laboratory result; no additional dry-basis qualification is stated in the supplied specification, so one should not be added by assumption.

Why Biuret Matters in Urea

Biuret is a key quality parameter when assessing urea. This specification sets Max 1% w, with BS EN 15479, ISIRI 75 as the stated test methods. Compare the measured result with the agreed maximum rather than treating the product name as evidence of conformity.

Buyers should confirm the limit, method and intended-use requirements in the contract and CoA. This limit alone does not establish suitability for every crop, application method or special use; no such crop-safety claim is made here.

Moisture and Free Ammonia

Water in fertilizer is specified as 0.2–0.4% w. This is a range, not simply a maximum of 0.4%. The method is DSM 0281-B2-E, modified from ISO 760, with ISIRI 75 also listed. Moisture is relevant to storage-condition and handling assessments, but a single moisture figure cannot by itself predict caking or storage performance.

Free Ammonia is Max 100 mg/kg, with the supplied in-house laboratory method recorded in the table. Retain mg/kg when comparing reports. Check this chemical quality parameter alongside sampling conditions and the other results rather than inferring handling safety from compliance with one limit.

Granular Urea Particle Size and Dust

The required size fraction is Minimum 90% w between 2–4 mm. Separately, dust smaller than 0.55 mm is Max 0.2% w. Both entries use ISO 8397, ISIRI 75. The main size fraction and the dust limit answer different questions and should remain separate CoA checks.

Size distribution can influence bulk handling, spreading and blending consistency. Buyers should compare the sieve result, sampling procedure and condition at the agreed inspection point. A stated size band does not guarantee zero fines, no segregation or identical performance in every blending system.

Physical Properties for Bulk Handling

Crushing Strength is listed as 3 kg. Preserve that original unit: the supplied information does not define a minimum or maximum, granule selection procedure or force conversion. Treat it as a reference property and agree how the in-house test result will be assessed before using it as a rejection criterion.

Stowage Factor is 1.35 Bulk m3/t. Bulk Density is 750 / 760 g/L, in the stated order Loose / Tapped. These are separate reference measurements for volume and handling discussions. Do not silently replace one with a reciprocal calculation of the other; confirm the measurement and loading basis for the planned cargo.

pH is 8.5–9.5 in a 10% solution at 20°C, using an in-house method. Preserve the solution concentration and temperature when comparing results. The table also lists Formaldehyde at 0.45–0.55% w; this content range is not a description of an unverified coating formulation. None of these reference values should be treated as universal properties of all urea.

What Does 46-0-0 Mean?

In fertilizer N-P-K notation, 46-0-0 means 46 nitrogen / 0 phosphate / 0 potash on the fertilizer label basis. It describes the declared nutrient grade, not particle size, biuret, moisture or a complete assay. It is not a claim that the material has no other constituents.

Granular Urea Uses

Common granular urea uses are agricultural nitrogen fertilization and supply to fertilizer distribution or blending operations. Bulk buyers should specify how the material will be handled, stored and used, then assess its size distribution and quality requirements against that use.

This article concerns fertilizer-grade granular material. It does not establish technical-grade, automotive-grade or other industrial suitability, and it does not prescribe crop-specific application rates.

Urea HS Code and Documentation

Buyers researching the urea granular HS code will commonly encounter HS 3102.10 for urea. Final customs classification must be confirmed for the relevant jurisdiction and shipment; the reference here is context, not legal or customs advice.

A buyer’s document review may include a commercial invoice, packing list, CoA, Certificate of Origin and shipping documents. Agree the required documents, issuer and timing for the transaction. This checklist is not a statement that MatinTouch always provides every document, and the loading port alone does not prove product origin.

What Buyers Should Check on a CoA

Read the CoA against the contract row by row. A general certificate title is not enough: the results need to refer to identifiable material and use the agreed methods and units. Clarify how any missing result or different method will be resolved before acceptance.

• Total Nitrogen, Biuret, Water / Moisture and Free Ammonia: result, unit and acceptance criterion.
• Formaldehyde, Particle Size Distribution and Dust: separate results, including the relevant size thresholds.
• Test methods and versions; request clarification for in-house methods where needed.
• Batch / lot identification, date, and producer / laboratory identification where applicable.
• Any physical properties made contractual, with the test basis and tolerances.
• Which document controls acceptance, who approves it and how conflicting reports are handled.

Contract Specification Checklist

Convert the reference specification into clear, agreed acceptance criteria before contracting. A minimum, a maximum and a range are not interchangeable. Where the source only gives a reference property, agree its role explicitly instead of adding an unstated tolerance or guarantee.

• Product name and grade: Urea 46% fertilizer; form: granular.
• Nitrogen minimum; biuret maximum; water / moisture range; free ammonia maximum and formaldehyde range.
• Particle-size fraction and dust limit with their sieve thresholds.
• Test methods, sampling method, sample identification and the inspection point.
• Any agreed tolerances, treatment of conflicting results and claims procedure.
• Accepted documentation, issuer responsibilities and the document controlling acceptance.
• Incoterm and named place, loading point / destination and shipment quantity.
• Any handling reference made binding, including its measurement basis and acceptance rule.

Available Granular Urea Supply

MatinTouch currently offers Granular Urea 46% from Iran / Oman / Türkiye, with a minimum order quantity of 25 MT. Loading points include Bandar Imam Khomeini / Bandar Abbas / Sohar / Mersin; available Incoterms are FCA / FOB / CFR / CIF. Confirm the origin, loading point and contractual specification in the final offer.

Frequently Asked Questions