E1, E0 and CARB P2 are MDF formaldehyde grades from different systems. E1 is the European class in EN 13986 (0.124 mg/m³ or less, EN 717-1 chamber). E0 is a stricter Chinese grade (0.050 mg/m³ or less). CARB P2, now TSCA Title VI in the US, sets 0.11 ppm for MDF and requires third-party certification and labels.
Key takeaways
- E1 (EN 13986) is the European baseline: 0.124 mg/m³ or less, about 0.1 ppm, measured with the EN 717-1 chamber method.
- Since 6 August 2026, EU REACH limits furniture and wood-based articles to 0.062 mg/m³, roughly half the E1 threshold, under its own test conditions.
- “E0” has no EN definition; in China’s revised GB 18580-2025 it means 0.050 mg/m³ or less, so always ask which standard a supplier means.
- For the US, MDF must meet 0.11 ppm (thin MDF 0.13 ppm) under TSCA Title VI, be certified by an EPA-recognised third-party certifier and carry compliant labels.
- US importers must sign a TSCA import certification and keep supply-chain records for three years.
Last reviewed: October 2026 by the Linegrain specification team.
Why does formaldehyde matter in MDF wall panels?
Most MDF is bonded with urea-formaldehyde or similar resins, and small amounts of formaldehyde are released over time, faster in warm, humid rooms. Because slat and fluted panels cover large wall areas, their emission grade affects indoor air quality and, in several markets, legal compliance.
The difficulty is that the systems use different test methods and units, so “E0” or “CARB” in a quotation can mean very different things.
What are the limits for E1, E0, CARB P2 and TSCA Title VI?
| Grade or rule | Limit | Test method | Where it applies |
|---|---|---|---|
| E1 (EN 13986, Annex B) | ≤ 0.124 mg/m³ (about 0.1 ppm) | EN 717-1 chamber | Wood-based panels for construction in Europe and the UK |
| E2 (EN 13986, Annex B) | > 0.124 mg/m³ | EN 717-1 chamber | Restricted or not accepted in most European markets |
| EU REACH Annex XVII, entry 77 | 0.062 mg/m³ for furniture and wood-based articles (from 6 August 2026) | Conditions in Appendix 14 of the restriction | Placing on the EU market |
| E0 (China, GB 18580-2025) | ≤ 0.050 mg/m³ | Method set in the Chinese standard | China; widely quoted in export offers |
| ENF (China, GB/T 39600-2021) | ≤ 0.025 mg/m³ | Method set in the Chinese standard | Voluntary top grade in China |
| TSCA Title VI / CARB Phase 2: MDF | 0.11 ppm | ASTM E1333 large chamber | All of the US (federal); California (CARB) |
| TSCA Title VI / CARB Phase 2: thin MDF (≤ 8 mm) | 0.13 ppm | ASTM E1333 | As above |
| TSCA Title VI: hardwood plywood | 0.05 ppm | ASTM E1333 | As above; relevant for veneered laminated products |
Sources for the table: E1 and E2 from the TÜV Rheinland guideline on wood-based panels; REACH from ECHA’s text of REACH Annex XVII entry 77; E0 and ENF from Xinhua’s report on China’s revised panel standards; US limits from 40 CFR Part 770, section 770.10.
Why you cannot line the numbers up directly
Converting everything to one unit gives a rough sense of strictness, but it is not a compliance test. EN 717-1, ASTM E1333 and the Chinese test methods use different chambers, loading ratios and conditions, so a result in one method does not predict another. A board tested at “0.10 ppm” in Europe is not proven to meet the US limit, let alone certified for it.
What does E1 mean, and is it still enough in Europe?
EN 13986 is the harmonised European standard for wood-based panels used in construction. Its Annex B divides panels into E1 (0.124 mg/m³ or less) and E2 (above that), and initial type testing uses the EN 717-1 chamber method, according to the TÜV Rheinland guideline. Several countries, including Germany, add national requirements. E1 is the minimum a UK or EU buyer should expect on the declaration for MDF in a wall lining.
The bigger change is the EU-wide REACH restriction. REACH Annex XVII entry 77 sets 0.062 mg/m³ for furniture and wood-based articles, and 0.080 mg/m³ for other articles, from 6 August 2026, measured under the restriction’s Appendix 14 conditions. That is about half the E1 threshold. For panels placed on the EU market, “E1” on its own is no longer the whole story: ask for a test against the REACH limit for the finished product, and check whether any of the restriction’s exemptions apply to your goods.
Great Britain runs a separate UK REACH regime, so GB importers should check the current position with HSE rather than assume the EU dates apply. Some UK specifiers already ask for emissions well below E1 on wellbeing or green building projects.
What does “E0” mean when a supplier offers it?
There is no E0 class in EN 13986. The term comes mainly from Chinese standards and is used loosely in export offers. Under China’s revised mandatory standard GB 18580-2025, E1 is 0.124 mg/m³ or less and E0 is 0.050 mg/m³ or less, and the voluntary GB/T 39600-2021 adds an ENF grade at 0.025 mg/m³ or less, as reported by Xinhua.
When a quotation says “E0 MDF”, ask three questions:
- Which standard defines it (GB 18580-2025, GB/T 39600-2021, or something else)?
- Which test method and laboratory produced the result, and is the lab accredited (CMA or CNAS in China, or an ISO/IEC 17025 lab elsewhere)?
- Does the report cover the board actually used in your panels, from the named board mill, within the last year?
E0 board is a sensible upgrade for European projects facing the REACH limit, but it does not, by itself, satisfy US rules.
What do CARB P2 and TSCA Title VI require?
CARB’s Airborne Toxic Control Measure introduced Phase 2 limits in California; the federal rule, TSCA Title VI, now applies the same limits across the US. The US EPA states that its standards are identical to CARB ATCM Phase II. The limits in 40 CFR 770.10 are 0.11 ppm for MDF, 0.13 ppm for thin MDF (8 mm or less), 0.09 ppm for particleboard and 0.05 ppm for hardwood plywood, measured to ASTM E1333.
The key differences from E1 are procedural, not only numerical:
- Third-party certification. The panel producer must be certified by an EPA-recognised TSCA Title VI third-party certifier (TPC), with ongoing quality-control testing. A one-off lab report is not certification.
- TSCA labelling. After 22 March 2019, products must be labelled as TSCA Title VI compliant, and EPA has clarified that labels must be present at the point of entry into the US. Panel labels show the producer’s name, a lot number and the TPC number; finished-goods labels show the fabricator, the production date and a compliance statement.
- No CARB-only shortcut. Since 22 March 2019, products made or imported must be TSCA Title VI certified and labelled; CARB reciprocity alone is not enough, according to the EPA.
Veneered panels and the laminated product rule
A slat panel with real wood veneer pressed onto an MDF core can fall under the “laminated product” provisions. EPA’s small entity guide states that from 22 March 2024, non-exempt laminated products become hardwood plywood and must meet panel producer requirements. In practice that means the veneering factory may need its own certification, or an exemption, and the relevant limit becomes the hardwood plywood figure of 0.05 ppm. Ask your supplier how veneered builds are certified before you order. Our comparison of veneer vs laminate slat panels covers the other differences.
What must an importer do for US and UK shipments?
Importing into the US
The EPA small entity compliance guide for importers, distributors and retailers sets out the main duties:
- Take reasonable precautions to make sure the composite wood products you sell or hold for sale comply with TSCA Title VI.
- Keep records that identify the panel producer, the date of production and the supplier, plus bills of lading, invoices or comparable documents stating that the product is TSCA Title VI compliant.
- Keep those records for three years from the import date, and provide them to EPA within 30 calendar days if asked.
- Sign the TSCA import certification on the customs entry or invoice for regulated composite wood products.
- Keep labels intact, and if you split bundles, keep a system that links each item back to its label and supplier.
For slat panels, ask the supplier for the MDF mill’s TPC certificate, the lot numbers used and a finished-goods label on every carton or panel, and agree before production who appears as fabricator on the label. Our OEM and private label service covers carton labels and inserts.
Importing into the UK
There is no UK equivalent of TSCA certification. Expect a declaration of E1 or better to EN 13986, a recent emission test report and traceability to the board mill; if goods also go to the EU, plan for the REACH 0.062 mg/m³ limit. Our guide to importing acoustic slat panels from China covers the wider document set, from commercial invoices to test reports.
How do you check formaldehyde compliance before shipment?
Paperwork only helps if it matches the board in your cartons:
- Name the board grade and standard in the purchase order: for example “E1 to EN 13986”, “E0 to GB 18580-2025”, or “TSCA Title VI certified MDF, TPC number to be stated”.
- Ask for the board mill’s certificate and lot numbers before production, not after.
- Check board labels or stamps on site, or ask your inspector to photograph them during production.
- Confirm that edge sealing, lacquer and adhesives do not add their own emissions; finishes and glues are part of the finished good.
- Keep test reports and certificates with the shipment file for at least the US three-year retention period.
The pre-shipment inspection checklist for wall panels shows how to add these checks to a standard inspection.
Which grade should you specify?
Match the grade to the installation market:
- UK projects: E1 as a minimum; E0 for offices, schools, healthcare and projects with indoor-air targets.
- EU projects: a board and finished product that meet the REACH 0.062 mg/m³ limit, which in practice usually means a lower-emitting board than standard E1.
- US projects: TSCA Title VI certified MDF with labels in place before shipment; for California, also confirm CARB requirements with the certifier.
At Linegrain, acoustic slat panels and MDF fluted wall panels are made on E1 MDF as standard, with E0, CARB P2, moisture-resistant or fire-retardant MDF available on request.
FAQ
Is E0 MDF better than CARB P2 MDF?
They are not directly comparable. E0 is a Chinese grade measured by the method in the Chinese standard; CARB P2 and TSCA Title VI use ASTM E1333 and require third-party certification. A board can test well against E0 and still not be legal for the US if it is not TSCA certified and labelled.
Does E1 MDF meet CARB P2?
Not automatically. E1 is a European emission class tested with EN 717-1. The US rules need a result under ASTM E1333 below 0.11 ppm for MDF, certification by an EPA-recognised third-party certifier and TSCA Title VI labels.
Do acoustic slat panels need a TSCA label?
Yes, if they are sold in the US and contain MDF, they are finished goods containing regulated composite wood and need compliant labelling. Agree the label content and who is named as fabricator with your supplier before production.
What is the EU REACH formaldehyde limit for wall panels?
From 6 August 2026, REACH Annex XVII entry 77 sets 0.062 mg/m³ for furniture and wood-based articles, measured under the restriction’s own test conditions. Check the scope and exemptions for your specific product with your test laboratory.
Tell us the market and the board grade you need (E1, E0 or TSCA Title VI) and we will quote panels with matching board documentation. Request a quote.