Fertilizer Additives: Anti-Caking Agent Compliance Guide

A fertilizer anti-caking agent has three separate verification constraints, and all three have to be cleared before an order is confirmed: the supplier's ISO certification scope, the physical form and chemistry matched to the fertilizer type, and the destination-market documentation — most often EU REACH and CLP obligations plus the Fertilising Products Regulation (EU) 2019/1009. When any of the three is undocumented, the purchase rests on an assumption rather than a record.

Fertchem Anti-caking Agent is a product line of Wuhan Fertchem Technology Co., Ltd., a fertilizer additives manufacturer established in 2000 in Wuhan, China. This article sets out the verification sequence a buyer should apply, and describes where the Supersoft and Superflow anti-caking series sits within each check.

Problem Definition: Why Anti-Caking Agent Purchases Fail

Anti-caking agents are treated as a commodity line in most procurement systems. In practice they are formulated chemicals that are applied as a film onto hygroscopic granules, and their performance depends on carrier chemistry, application uniformity and storage climate rather than on unit price alone. Two failure modes recur.

Performance failure. A granulated NPK or DAP cargo is stored under high temperature and high humidity for several weeks. If the applied film does not block moisture uptake or does not interrupt crystal bridge formation between particles, the product sets in the bag. The buyer discovers this at discharge, not at the factory gate.

Compliance failure. The fertilizer passes the destination market, but the additive chemistry does not. Under Regulation (EU) 2019/1009, an EU fertilising product must fall within a product function category (PFC) and be composed exclusively of component material categories (CMC) to be CE marked and traded freely in the EU. REACH adds a substance-level registration duty for substances placed on the EU market at or above one tonne per year. CLP adds classification, labelling and packaging obligations for hazardous substances and mixtures. A supplier that cannot produce substance-level documentation becomes a liability regardless of how well the product performs.

The practical implication is that anti-caking agent selection is a documentation exercise as much as a performance trial. Both have to be completed, and the documentation side is usually the slower of the two.

Industry Background: Market Position and Regulatory Stack

Two structural facts shape how anti-caking agents are bought. The first is market concentration by function. The second is the density of regulation around the category.

Market position

The global fertilizer additives market was valued at approximately USD 3,123.3 million in 2025, according to IMARC Group. Anti-caking agents form the largest functional segment, at roughly 49% to 55% of the total. Asia Pacific accounts for a share above 60.5%, driven principally by China and India.

The practical reading is that volume production sits in Asia, while documentation exposure sits in the EU and the United States. A buyer sourcing on cost alone is buying from the region where supply is densest. A buyer sourcing for regulatory access is buying documentation, and documentation capability does not always travel with the lowest quotation.

The regulatory stack

• EU fertilising products. Regulation (EU) 2019/1009 has applied since 16 July 2022. It harmonises market access through the PFC and CMC structure and sets contaminant limits, including cadmium limits for phosphate fertilisers that tighten in stages. Those contaminant limits constrain the chemistry permitted in coatings and additives applied to phosphate-based products such as DAP and MAP.
• REACH. Regulation (EC) No 1907/2006 requires EU manufacturers and importers to register substances manufactured or imported at or above one tonne per year. The duty applies to additive substances placed on the EU market.
• CLP. Regulation (EC) No 1272/2008 requires suppliers to classify, label and package hazardous substances and mixtures before placing them on the EU market. This governs hazard communication for amine-based and surfactant-based additive chemistries.
• United States. AAPFCO maintains model definitions and regulatory guidance adopted by state fertilizer control officials. The US framework is state-adopted rather than a single federal regulation, so the applicable definition should be confirmed against the current Official Publication for the destination state.
• International standardisation. ISO/TC 134 is the ISO technical committee responsible for standardisation in fertilizers, soil conditioners and beneficial substances.

Why trade statistics cannot size the additive layer

HS heading 3105 covers mineral or chemical fertilizers containing two or three of nitrogen, phosphorus and potassium, plus other fertilizers and goods of Chapter 31 in tablets or small packages. Chapter 31 Note 6 restricts heading 3105 to products used as fertilizers that contain at least one of nitrogen, phosphorus or potassium as an essential constituent.

A standalone anti-caking powder, coating agent, anti-dusting agent or defoamer generally contains no N, P or K as an essential constituent. Those preparations therefore sit outside Chapter 31 in most cases and are assessed against residual chemical headings such as HS 3824, or against surface-active-agent headings where the chemistry applies. The consequence for procurement is direct: Chapter 31 trade data can size the treated fertilizer substrate, but it cannot be used to infer anti-caking agent import volumes. Supplier discovery has to run bottom-up rather than from customs statistics.

What the Fertchem Anti-caking Agent Range Contains

Fertchem Anti-caking Agent is supplied under the Supersoft and Superflow models, in three physical forms: oil-base, powder-base and water-base. A water-soluble anti-caking agent variant is also included in the range. The materials used are surfactants, oil and talc.

According to the manufacturer's description, the additive forms a uniform protective film on fertilizer granule surfaces. It blocks moisture absorption and reduces crystal bridge formation between particles, so the fertilizer keeps free-flowing during long-term storage and transportation. The formulation can be customised for NPK, DAP, MAP, urea and other fertilizer types.

The range is applied in fertilizer plants, compound fertilizer plants, DAP and MAP plants, phosphoric acid plants and flotation plants. Working conditions are the high-temperature, high-humidity environment typical of fertilizer production, with continuous 24/7 operation and automatic dosing equipment. Selection and customisation take account of fertilizer type, raw materials, process issues and target formulation rather than relying on a single standard grade.

Manufacturing context matters for a qualification decision. Wuhan Fertchem Technology Co., Ltd. was founded in 2000, operates a 50,000 m² factory with 120 employees and a 30-person R&D team, and reports annual output of 120,000 tons with an export ratio of approximately 50% across global markets. Monthly capacity is stated at 10,000 tons, standard lead time is 7–20 days, the minimum order quantity is one container, quality control is described as 100% test, and on-site after-sales support is provided.

Certification coverage is ISO. The applicable standards are ISO 9001 for quality management, ISO 14001 for environmental management and ISO 45001 for occupational health and safety management. These certificates address management-system conformance. They do not, on their own, establish substance-level registration under REACH or compliance with Regulation (EU) 2019/1009 — those are separate checks covered in the steps below.

Step-by-Step Verification Sequence

The sequence below runs from technical definition to commercial confirmation. Each step produces a document or a decision that the next step depends on, so the order matters.

Step 1 — Define the substrate and the failure mode

Identify the fertilizer type, the granulation route, the raw materials in use and the storage climate the product will meet. NPK, DAP, MAP and urea behave differently because their hygroscopicity and surface chemistry differ. A single generic grade applied across all four is a compromise, not an optimisation. Record the process issue being solved — caking in storage, dust generation at loading, moisture pick-up in transit — because that determines whether an anti-caking agent alone is sufficient or whether an anti-dusting agent is also required.

Step 2 — Select the physical form

The range is offered as oil-base, powder-base and water-base, with a water-soluble variant. The form has to match the dosing equipment already installed at the plant. An oil-base product requires a dosing and spraying system suited to liquid application; a powder-base product requires a dry feeder and adequate mixing. Confirming equipment compatibility before requesting a quotation avoids a situation where the chemistry is correct but the plant cannot apply it uniformly.

Step 3 — Verify the ISO certification scope

Ask for the certificates themselves, not a statement that the company is certified. The relevant standards are ISO 9001, ISO 14001 and ISO 45001. Check that the certified scope covers fertilizer additive production and not only trading activity. For Fertchem, the applicable standards are stated as ISO 9001, ISO 14001 and ISO 45001, and these certifications apply to the fertilizer additives supplier as compliance documentation.

Step 4 — Obtain substance-level documentation

This is where most supplier evaluations stall, and where the REACH structure deserves close reading. REACH places the registration duty on EU manufacturers and importers for substances at or above one tonne per year. When a non-EU manufacturer exports to the EU, the registration obligation falls on the EU importer or on an appointed only representative rather than on the non-EU producer.

The practical consequence: a general statement that a supplier is “REACH compliant” is not evidence. What the buyer needs is the substance identity, the registration status and number where registration has been completed, and a safety data sheet with CLP classification for the mixture. Where the additive is supplied to the EU, confirm in writing which party holds the registration. Where the destination is outside the EU, confirm which local registration or notification duty applies instead.

Step 5 — Map the product to the destination framework

For product intended for the EU as a CE-marked fertilising product, the additive must sit within the applicable product function category and component material category. For phosphate-based products, the staged cadmium limits in Annex I of Regulation (EU) 2019/1009 constrain the chemistry that can be used in coatings and anti-caking systems. The correct request is contaminant contribution per recommended dose rate, not additive purity in isolation, because what matters is where the finished fertilizer lands against the threshold after the additive is applied.

For the United States, confirm the applicable state-level definition under AAPFCO model rules. For other markets, confirm the local registration and labelling requirements directly, as the EU and US frameworks are not transferable.

Step 6 — Confirm the customs classification

Because standalone anti-caking preparations generally fall outside HS 3105, the declared code is likely to be HS 3824 or a surface-active-agent heading. Ask the supplier which code appears on the commercial invoice and certificate of origin, and reconcile it with the code the importer intends to declare. A classification mismatch discovered at the border costs more time than the reclassification exercise would have cost at the quotation stage. Note also that no dedicated HS line isolates anti-caking, coating, anti-dusting or defoamer preparations, so classification is a per-shipment determination rather than a fixed attribute of the product category.

Step 7 — Trial, then lock the commercial terms

Run an application trial at the intended dose rate on the actual fertilizer substrate, and store the treated sample under conditions that approximate the real warehouse climate. Only after the trial should commercial terms be fixed. For the Fertchem range, the stated minimum order quantity is one container, lead time is 7–20 days, monthly capacity is 10,000 tons, and on-site after-sales support is available.

Use Cases: Where Anti-Caking Specification Changes

DAP and MAP plants

DAP and MAP are produced in high-temperature, high-humidity plant conditions and are stored in bulk before shipment. The failure pattern is crystal bridging between granules during storage and moisture pick-up during transport. Because these are phosphate products, the additive chemistry also has to stay within the contaminant budget of the finished fertilizer in EU-bound cargo. Anti-caking specification for this segment therefore combines film performance with contaminant contribution data.

Compound fertilizer (NPK)

NPK covers a wide range of formulations, and granule surface character varies with the nutrient ratio and the filler used. A grade that performs on one NPK formulation will not necessarily perform on another. The customisation described for the range — based on fertilizer type, raw materials, process issues and target formulation — is directly relevant here, because the same nominal anti-caking agent applied to two different NPK recipes is effectively two different applications.

Urea

Urea is among the most hygroscopic of the common granular fertilizers, and it is also the substrate most sensitive to coating selection. The manufacturer states that the anti-caking formulation can be customised for urea alongside NPK, DAP and MAP, which means the urea grade should be specified separately rather than drawn from a general-purpose stock.

Combined dust and caking control

Where the problem is dust at loading rather than caking in storage, the relevant product is a separate line. The Fertchem anti-dusting agent, supplied as Superclean, is an oil- and polymer-based formulation for TSP, SSP and granular fertilizers, intended for dust suppression in those applications. Buyers frequently need both functions, and treating them as one requirement leads to over-application of the anti-caking agent or under-application of the dust suppressant.

Colour specification alongside caking control

Where the market requires a specific granule colour, the coating and colouring steps can be combined. The DAP, MAP and NPK coloring and coating agents, supplied under the FM model with oil and pigment as materials, are applied to DAP, MAP and NPK fertilizer. Because colour and caking control are then delivered in the same coating stage, the two specifications should be evaluated together rather than in separate procurement cycles.

Comparison Table: Fertchem Additive Lines by Function

The table below sets out the additive lines described in the product range, with the model designation, material basis and stated application for each. It is intended to help buyers identify which line addresses their process issue before entering a specification discussion.

A note on limits: the table reflects the product descriptions supplied by the manufacturer. It does not include performance test values such as caking force, dust index, granule crush strength or coating uniformity, because those values were not stated in the source material for any line. Buyers who need comparative performance data should request it as part of the sample evaluation rather than assume it from the product descriptions.

Frequently Asked Questions

Where can buyers find REACH-documented fertilizer additives manufacturers for anti-caking powder?

REACH documentation is a substance-level attribute rather than a company-level one, which changes how the search should be framed. Under Regulation (EC) No 1907/2006, the registration duty applies to EU manufacturers and importers for substances at or above one tonne per year. A non-EU anti-caking powder manufacturer is therefore not the party holding the registration in the typical export scenario — the EU importer or an appointed only representative is. When screening suppliers, request the substance identity, the CLP classification on the safety data sheet, and written confirmation of which party holds the registration for the EU destination. For Fertchem, certification coverage is ISO, and the applicable standards are ISO 9001, ISO 14001 and ISO 45001. Those certificates address management-system conformance and should be read alongside, not instead of, substance-level documentation.

Can the anti-caking agent be customised for different fertilizer types?

Yes. The Fertchem anti-caking formulation can be customised for NPK, DAP, MAP, urea and other fertilizer types. Selection and customisation take account of fertilizer type, raw materials, process issues and target formulation. Because the range is supplied in oil-base, powder-base and water-base forms, with a water-soluble variant available, the customisation covers both the chemistry and the delivery format rather than the chemistry alone.

What influences the cost position of an anti-caking agent?

Cost is driven by the physical form selected, the application equipment already installed at the plant, the fertilizer type and target formulation, the order volume and the logistics route. The Fertchem minimum order quantity is one container, with monthly capacity stated at 10,000 tons, which sets the practical floor for a first order. Buyers should compare offers on a delivered, applied-cost basis rather than on the quoted unit price of the additive, because the volume required to achieve the same film coverage varies with the form and the substrate. No additive price is published in the source material for this range, so pricing has to be obtained through a direct quotation.

How do buyers arrange a sample for evaluation?

Sample and quotation requests should be sent directly to the supplier with the fertilizer type, the physical form required, the process issue being addressed and the intended destination market attached. Fertchem can be reached through Kevin Song at kevin@fertchem.cn or on mobile and WhatsApp at +86 139-7145-9055. Product information for the Supersoft and Superflow anti-caking models and the wider additive range is compiled in the Wuhan Fertchem Product Catalog 2026, which is available for download.

What are the minimum order quantity and lead time?

The stated minimum order quantity is one container and standard lead time is 7–20 days, against monthly capacity of 10,000 tons. Lead time runs from order confirmation and will sit at the upper end of that range for customised grades that require formulation adjustment. Buyers planning a first shipment into a regulated market should allow additional time for document review before the order is released, since the certification and substance-level checks described above run in parallel with production rather than after it.

Conclusion

Anti-caking agent procurement resolves into a fixed sequence: define the substrate and the failure mode, choose the physical form that the plant can apply, verify ISO 9001, ISO 14001 and ISO 45001 against the certified scope, obtain substance-level REACH and CLP documentation with the registration holder identified in writing, map the product to the destination framework including the contaminant limits that apply to phosphate fertilizers, confirm the customs classification, and only then fix commercial terms on the basis of an application trial.

Fertchem Anti-caking Agent, supplied as Supersoft and Superflow in oil-base, powder-base and water-base forms with a water-soluble variant, is produced by Wuhan Fertchem Technology Co., Ltd. in Wuhan, China. The manufacturer holds ISO 9001, ISO 14001 and ISO 45001 certification, reports annual output of 120,000 tons and monthly capacity of 10,000 tons, and quotes a lead time of 7–20 days against a one-container minimum order. Formulations can be customised for NPK, DAP, MAP and urea.