Formamide in Foam Mats: What B2B Buyers Need to Know

Before comparing formamide results from two suppliers, check the samples. A report for an unprinted foam core and a report for a laminated, printed play mat may both be genuine, yet cover different products. The lower number is not enough to decide which mat meets your requirements.

For an importer, retailer, or private-label brand buying EVA puzzle tiles, XPE play mats, or other foam products, the work starts before samples reach the laboratory. Identify the foaming route, determine what needs to be measured, and ensure the sample represents the order.

This guide follows that process: where formamide may come from, how to read the different test results, which market requirements to check, and what to put in the purchasing specification.

Quick answer: Formamide is not an inherent component of every EVA, XPE or TPE mat. It may occur as a residue or processing by-product in some foam systems, including those using certain chemical blowing agents. The formula, production conditions, storage and conditioning history, product layers and test method all matter. Set the test requirement for the product category and market in which the mat will be sold, not for the polymer name alone.

What Formamide Is – and What It Is Not

Formamide, also called methanamide, is an organic compound with CAS number 75-12-7. It is used in industrial chemistry as an intermediate or solvent and has also been reported in connection with plastic and foam processing.

The European Chemicals Agency includes formamide on the REACH Candidate List of substances of very high concern because it is toxic for reproduction. This hazard classification is a valid reason to control the substance, but it does not establish the exposure associated with every finished mat.

Formamide is sometimes confused with other chemicals that require different tests and regulatory checks:

A formaldehyde or DMF result cannot be used as evidence for formamide.

Why Formamide May Occur in a Foam Product

Foam is produced by creating gas cells inside a polymer and stabilizing the expanding structure. The gas can be supplied by a chemical blowing agent, a physical process, a reaction, or another route suited to the polymer and product. The separate NEEU guide to foam blowing agents explains how these routes affect foam production and finished-mat properties.

In some chemically foamed materials, formamide has been associated with azodicarbonamide, which may appear in technical documents as AC, ADC, or ADCA. Under the conditions used for a particular formulation, it may occur as a decomposition-related by-product or residual substance. Other formulation ingredients or process residues may also require investigation. The source cannot be identified by looking at or smelling a finished mat.

If a result needs investigation, ask for the blowing-agent grade and dosage, activator system, mixing records, temperature history, and post-production conditioning. Include any changes to crosslinking or cell structure in that review. A process adjustment made to improve the mat’s physical properties is not, by itself, evidence of lower formamide. NEEU’s foam mat foaming process explains where expansion fits into manufacturing; testing then checks the mat against the agreed chemical requirement.

Why the Material Name Is Not Enough

An EVA foam mat can be formulated for different densities, hardness levels, colors, cell structures, and applications. Two products that look alike may have different compounds and process histories. When sourcing EVA foam mats, specify what the product contains, including its surface layers, and request testing that covers them. A declaration about virgin EVA resin does not cover the additives in the compound or the mat’s print, coating, and lamination.

XPE generally refers to crosslinked PE foam, while IXPE commonly identifies a polyethylene foam crosslinked by irradiation. Crosslinking creates the polymer network; foaming creates the cellular structure. These are different jobs. Knowing how the polymer was crosslinked does not tell you which blowing agent was used. For an XPE foam mat, ask about both processes and obtain a report covering the mat you plan to buy. Neither XPE nor IXPE is an automatic formamide-free designation.

For TPE, TPU, and PU systems, the foaming route also matters. Some TPU or PU formulations use reaction or physical foaming without ADCA, thereby avoiding that pathway. That is useful process information, but it does not guarantee that the entire material family is free of formaldehyde. Check the commercial formula, other layers, and processing route for the proposed product.

Density, hardness, and thickness are not substitutes for chemical testing either. A lighter mat does not reveal its additive package, and a firmer mat is not evidence of a lower residue level. If a supplier changes the formulation to achieve a new physical specification, include the chemical requirements in the change review.

Hazard and Exposure Answer Different Questions

A hazard classification describes what a substance is capable of causing under relevant exposure conditions. Product exposure refers to the extent to which a substance can reach a user under the circumstances in which the product is actually used.

For a foam mat, that assessment may be affected by:

• the amount present in the material;
• the rate at which it can leave the polymer;
• exposed surface area and cut edges;
• films, coatings, prints, adhesives and laminated layers;
• temperature, humidity and room ventilation;
• the age and conditioning history of the product;
• frequency and duration of use;
• the user’s age and foreseeable behavior.

These details explain why two mats made from the same polymer need not produce the same exposure. They also help the laboratory select conditions relevant to the requirement being assessed.

Content, Chamber Concentration and Emission Rate

Laboratory reports may use similar terminology while measuring different things. The following results should not be compared as though they were interchangeable:

Solvent extraction followed by GC-MS can be used to measure formamide in the material. Chamber or bag methods collect substances released into air under controlled conditions. Temperature, humidity, air exchange, loading factor, exposed area, and sampling time all affect how an emission result should be understood. A buyer cannot convert an extraction result into a chamber result merely by changing the unit.

The instrument name does not define the method

Suppose both supplier reports say GC-MS. One laboratory may have analyzed a solvent extract from cut foam, while the other analyzed air collected from a chamber. The instrument name matches; the measurements do not. Even two content tests can use different extraction solvents, times, temperatures, and sample preparation. Read the method details before comparing values, and check that the method is suitable for the mat’s materials and layers.

Air concentration and emission rate need context

An area-specific emission rate accounts for the exposed specimen area. Under a suitable steady-state chamber model, concentration, airflow, and specimen area are mathematically related. A comparison therefore needs the laboratory’s calculation basis, background correction, and test conditions. Changing the area or ventilation can change the relationship between the reported numbers. Neither result alone describes exposure in every room.

A VOC panel may not include formamide

Ask for the target-substance list. A 2020 study by Cui and colleagues developed a bag-sampling method for 35 VOCs in children’s mats, focusing on aromatic and halogenated hydrocarbons. Formamide was not among its listed targets. Such a panel cannot establish a formamide result simply because it concerns emissions from foam mats.

Heated bag screening also has a different purpose from a room-temperature chamber test. Record how the specimen was treated and which requirement the method is intended to address. A screening result, a chamber result, and an indoor exposure assessment should remain identifiable as separate outputs.

What Published Research Tells Buyers

The most useful lessons from the studies below concern how samples are prepared and measured. Their results belong to the products and test conditions studied, not to all foam mats.

In their 2018 investigation of EVA children’s furniture, Zhong and colleagues compared extraction conditions and separately investigated release from a selected sample in a small chamber. The work illustrates two procurement issues: the extraction procedure affects the resulting content, and emissions can change over the observation period. Its release findings do not establish a universal airing-out period for commercial mats.

Liu and Chen’s 2020 study examined uncertainty in measuring formamide in EVA foam used in footwear. Sample-measurement repeatability and calibration were major contributors in that analysis. For a mat buyer comparing laboratory results, the useful question is how much of the difference could be due to measurement rather than production. The footwear study helps frame that question; it does not establish the required test procedure for a children’s mat.

Cui and colleagues examined how sample treatment and collection conditions affected the children’s-mat VOC test. That makes the paper relevant when discussing a sampling protocol with a laboratory. It does not support ranking all PE, XPE, or EVA products, and, as noted above, its target list did not include formamide.

EU Rules for Formamide in Foam Toy Materials

Product classification comes first. A children’s mat is not automatically a toy in every market. A product designed or intended for play may fall within toy legislation depending on its intended age, claims, graphics, instructions, foreseeable use and marketing.

Commission Directive (EU) 2015/2115 added a specific formamide provision to Appendix C of the EU Toy Safety Directive. For foam toy materials within its scope:

• 200 mg/kg is a content-based cut-off that determines whether emission testing is required.
• When formamide content exceeds 200 mg/kg, emissions must not exceed 20 µg/m³ after a maximum of 28 days from the start of emission testing.
• The 200 mg/kg figure should not be presented as a universal content limit for every foam mat.

Appendix C concerns toys intended for children under 36 months and other toys intended to be placed in the mouth. The importer, test laboratory or qualified compliance adviser should confirm whether a particular mat falls within that scope.

The EU adopted Regulation (EU) 2025/2509 on toy safety in 2025. Most of the regulation applies from 1 August 2030, when Directive 2009/48/EC is repealed. The new regulation carries forward the formaldehyde condition. Programs expected to reach the market across this transition should be reviewed against the rules applicable on their intended placement date.

REACH Candidate List obligations are separate

Formaldehyde has appeared on the REACH Candidate List since 18 June 2012 because of reproductive toxicity. REACH communication obligations for articles containing a Candidate List substance at or above 0.1% by weight are separate from the foam-toy emission provision. SCIP notification is another obligation, arising under the Waste Framework Directive for relevant suppliers placing qualifying articles on the EU market. Confirm the duties that apply to the company’s supply-chain role.

The thresholds should not be combined. A concentration of 0.1% equals 1,000 mg/kg, whereas 200 mg/kg in the toy provision is the cut-off for the specified emission test. They serve different purposes and create different obligations.

Great Britain, the United States, and Retailer Programs

In Great Britain, toys are governed by the Toys (Safety) Regulations 2011, as amended. Product classification, essential safety requirements, conformity assessment, technical documentation, and marking should be checked against current UK guidance and designated standards. An older EU report should not be assumed to cover every GB obligation.

The United States does not apply the EU foam-toy formamide provision as a federal rule. CPSC guidance requires children’s products to be tested by a CPSC-accepted third-party laboratory for the federal children’s-product requirements that apply to them, and toys are subject to the applicable mandatory provisions of ASTM F963. Current CPSC toy guidance does not identify a standalone federal limit for formamide equivalent to the EU provision. Importers and retailers may nevertheless impose their own restricted-substance or emission specifications, and additional requirements can depend on product classification and claims.

California’s OEHHA records that formamide has been considered for Proposition 65 reproductive-toxicity listing but is not currently listed. It should not be confused with N,N-dimethylformamide when reviewing a customer’s Proposition 65 request.

Retailer and private-label programs often go beyond statutory minimums. Before sampling begins, obtain the current retailer manual, restricted-substance list, test protocol, and document format. Broad statements such as “EU compliant” or “US compliant” are not precise enough for product acceptance. NEEU’s certifications and compliance page shows how market requirements can be organized at the beginning of a foam-mat project.

Building a Formamide Test Plan

1. Classify the finished product

Record whether the product is a toy, children’s product, childcare article, adult exercise mat, general-use floor covering, or another category. Include the intended age group, product claims, destination country, and sales channel.

2. Define the requirement

Name the governing regulation, retailer protocol, or contractual target. State whether the result concerns content, chamber concentration, emission rate, or a combination. Include the method edition, reporting unit, sampling time, and acceptance threshold.

3. Send a sample that matches the order

Match the sample to the intended SKU based on material, density, thickness, color, print, film, lamination, adhesive, edge treatment, and conditioning. For baby and kids play mats, submit the finished puzzle tile, foldable panel, or complete mat rather than an unrelated foam coupon. Make those details visible in the sample description so the laboratory and purchasing team are referring to the same product.

4. Document age and handling

Record manufacturing date, packaging date, storage and sealing conditions, opening time, and laboratory receipt. These details can help explain differences between development samples, production samples, and later surveillance results.

Sampling continues after the package reaches the laboratory. Agree on which layers and locations are included, how the specimen is cut, and how it is handled before extraction or emission testing. For repeat measurements, control the time between cutting, weighing, and sealing. The EVA uncertainty study identifies handling and measurement repeatability as relevant concerns; they are not reasons to remove a mat’s surface layers unless the applicable method requires such preparation.

Keep identifiable samples from the same production lot under agreed storage conditions in case a result is disputed. If a second laboratory is asked to test them, provide the handling history to both laboratories. Otherwise, a retest can introduce another difference without explaining the first one.

5. Confirm the laboratory and method

Check whether the laboratory is accredited for the stated method and product matrix. The report should disclose the detection or quantification limit, sample preparation, measurement uncertainty where relevant, and the decision rule used to assess compliance.

Ask whether pigments, coatings, or adhesives in the sample require additional method checks. Validation for a different material matrix may not be enough. Check sensitivity as well: if the laboratory can only report below a threshold higher than your acceptance target, an ND result will not demonstrate that the stricter target was met.

6. Connect approval to production

Agree when testing will be repeated, such as after the first production run, a formula or supplier change, a new color or surface construction, a plant transfer, a significant process adjustment, scheduled surveillance, or a retailer request. Multiple independent production batches can be used to check repeatability for a high-priority children’s program. The quality-control process should connect the approved formula, production lot, and tested sample.

Reading a Laboratory Report

Use the test plan to check the report when it arrives. The laboratory’s sample description, method, and acceptance criterion should match what was commissioned. Look for:

• the substance name and CAS number;
• the client, manufacturer and tested sample;
• product type, color, thickness and layer construction;
• manufacturing or batch reference;
• test method, edition and reporting unit;
• the detection or quantification limit;
• chamber conditions, loading factor and test day when emissions are measured;
• the measured result and acceptance criterion;
• the laboratory, accreditation scope and issue date;
• deviations, subcontracted work and representative sample photographs, where available.

A report for a foam core can help during development. If the order is for a printed, laminated mat, however, ask the supplier to explain the coverage gap before approving it. The same check applies when the tested color or thickness differs from the order.

When a result is close to the acceptance threshold

Ask the laboratory to explain the applicable decision rule and how measurement uncertainty is treated. ILAC’s guidance on decision rules and statements of conformity provides a framework for this discussion. Follow a rule prescribed by the applicable requirement; where a choice is permitted, agree it before testing rather than after seeing the result.

Do not subtract uncertainty from an unfavorable number to create a pass. If two laboratories report slightly different values, first compare the specimens, methods, reporting basis, handling history, and uncertainty information. A small difference alone does not establish a formulation change. Where further testing is justified, document the retest plan and retain the original results alongside the new ones.

What “not detected” actually means

Check whether the report defines ND by a detection limit, quantification limit, or another reporting limit. These terms are not interchangeable. A substance can be detected at a level too low for reliable quantification, and laboratories may report that situation differently. Keep the laboratory’s wording and threshold attached to any claim made from the report.

Production Controls Behind a Repeatable Result

After sample approval, the factory needs to know what must stay consistent. Keep the approved material specifications and process records with the lot and test references so that any later changes can be traced.

Raw materials and additives. Approved-supplier records, material identification, and change control should cover polymers, blowing agents, activators, crosslinking ingredients, fillers, pigments, and other additives. Unapproved substitutions or poorly characterized recycled inputs add uncertainty to a controlled formula.

Weighing and dispersion. Consistent dosing and mixing reduce local concentration differences and unstable foam behavior. Dispersion also affects whether samples taken from different areas of a sheet or molded part are comparable.

Process window. Temperature, pressure, time, and cooling must be coordinated with gas generation and crosslinking. When a setting is changed to adjust density, hardness, or surface, review whether chemical testing is also needed. A setting that improves one physical property is not necessarily better for the chemical result.

Conditioning and packaging. Define the time between foaming, converting, conditioning, and sealed packing. Conditioning can be a controlled production step, but it cannot replace a suitable formulation and finished-product verification.

Change management. A different resin grade, additive supplier, color system, density, thickness, film, adhesive, or production site may change the evidence needed. Buyers and factories should agree in advance which changes trigger new sampling or testing.

Keep the approval specific: the polymer and additives, blowing and crosslinking routes, product layers, market requirements, test plan, and production batch should be traceable together. The SKU, method, and reporting limit recorded here also set the boundaries for any claim used on packaging or a product page.

Using “Low Formamide” and “Formamide-Free” Correctly

“Low formamide” has no useful meaning unless it is tied to a target, method, and unit. “Formamide-free” requires even more care because every analytical method has a finite detection capability.

A test-qualified statement is more defensible:

The laboratory reported formamide as not detected in the identified finished sample using [method]. Its stated reporting threshold was [value and unit], as defined in report [number], dated [date]. This statement applies to the tested SKU and batch.

Avoid claims based only on an assumption, including “XPE means zero formamide,” “odorless means chemically safe,” or “passed REACH” without naming the requirement and Candidate List date. A report for one construction should not be extended to untested materials, colors, or layers.

What to Ask Before the Supplier Quotes

The RFQ does not need to reproduce the laboratory protocol. It should resolve these six points so the quote covers the right product and testing:

1. Product: What materials and layers are included, from the foam core to the print, film, and adhesive?
2. Manufacturing route: Which blowing and crosslinking routes will be used?
3. Sales market: Which destination-market rule or retailer requirement is the supplier quoting against?
4. Measurement: Does the requested test cover material content, chamber concentration, emission rate, or more than one?
5. Sample coverage: Which SKU, color, thickness, and production batch will be identified in the report?
6. Later changes: Which material, formula, or process changes will require new testing?

Resolve unanswered items before commissioning samples. For example, if the supplier quotes a content test but the retailer requests chamber emissions, the test scope remains incomplete, even when both parties have written “formamide testing” in their documents.

Frequently Asked Questions

Preparing a Foam-Mat Project With NEEU

Start with the product you intend to sell and the requirements supplied by your importer or retailer. If a test report is already available, include its sample description and method, not just the page showing the result. That makes it possible to check what has been tested and what remains unresolved.

NEEU supports OEM and private-label foam-mat projects from material review and sampling through production and final inspection. When you contact NEEU about your test plan, include the product category, age grading, target market, preferred material, dimensions, surface layers, packaging plan, and retailer requirements. Any points still undecided, such as the final print or laminate, should remain open items in the sample and test plan.

References

1. European Chemicals Agency. Formamide, Candidate List of substances of very high concern for Authorisation. CAS 75-12-7; included for reproductive toxicity under REACH Article 57(c).
2. European Commission. Commission Directive (EU) 2015/2115, concerning formamide in foam toy materials.
3. European Union. Regulation (EU) 2025/2509 on toy safety. Most provisions apply from 1 August 2030.
4. European Chemicals Agency. SCIP information for suppliers of articles.
5. UK Office for Product Safety and Standards. Toys (Safety) Regulations 2011: Great Britain.
6. U.S. Consumer Product Safety Commission. Toy Safety business guidance and initial certification testing guidance.
7. California Office of Environmental Health Hazard Assessment. Formamide chemical page.
8. ANSES. Opinion on the uses of and health risks associated with formamide in children’s foam puzzle mats.
9. Zhong, W., Shi, L., Che, X., Lu, C., Shen, Y., and Tang, L. (2018). “Study on Detection and Release Rules of Formamide in EVA Children’s Furniture.” Analytical Instrumentation, 2018(2), 49-52. DOI: 10.3969/j.issn.1001-232x.2018.02.009.
10. Liu, Z., and Chen, Z. (2020). “Evaluation of Uncertainty in Determination of Formamide in EVA Foamed Material.” West Leather, 42(17), 27-29. DOI: 10.20143/j.1671-1602.2020.17.016.
11. Cui, J., Liu, C., Chen, S., and Cui, L. (2020). “Determination of 35 Volatile Organic Compounds in Children Playmat by Bag Sampling/Thermodesorption-Gas Chromatography-Mass Spectrometry.” Chinese Journal of Analysis Laboratory, 39(6), 700-705. DOI: 10.13595/j.cnki.issn1000-0720.2020.020902.
12. International Laboratory Accreditation Cooperation. ILAC G8:09/2019, Guidelines on Decision Rules and Statements of Conformity.