Formaldehyde Content in Office Chairs

The formaldehyde content of qualified office chairs that meet standards is usually controlled within a safe range, while non-qualified products may have excessive formaldehyde emissions.

I. Formaldehyde Content Standards for Qualified Office Chairs
According to China's standards such as "Classification of Formaldehyde Emission from Wood-based Panels and Their Products" (GB/T 39600-2021), qualified office chairs that use E₁-grade (≤0.124mg/m³) or ENF-grade eco-friendly panels and have well-executed edge sealing usually meet safety requirements for formaldehyde emissions. It should be noted that as a mandatory standard, the E1 grade previously specified a formaldehyde emission limit of ≤1.5mg/l (using the desiccator method) in the old version of the standard, while the E0 grade has stricter requirements (≤0.5mg/l). The GB 18584—2024 "Limit of Harmful Substances in Furniture", which will be implemented from July 1, 2025, further standardizes the non-destructive testing methods for formaldehyde emissions, providing more precise technical basis for market supervision.

II. Formaldehyde Risks of Non-Qualified Office Chairs
If office chairs are made of inferior panels, lack effective edge sealing, or have shoddy workmanship, formaldehyde emissions may significantly exceed the limit. According to inspections by the State Administration for Market Regulation, some office chairs produced by furniture factories have been reported for non-compliance with formaldehyde emission standards. Long-term exposure to such products may induce chronic respiratory diseases, allergic reactions, and even increase the risk of cancer. The main sources of formaldehyde include:

1. Wood-based panel substrates: Such as medium-density fiberboard and particleboard. If formaldehyde-containing adhesives are used and the process control is improper, formaldehyde will be continuously emitted;
2. Fabrics and fillings: Inferior leather, chemical fiber fabrics, or sponges may retain formaldehyde due to dyeing and wrinkle-resistant treatments;
3. Structural components: The edges or joints of panels without edge sealing may have higher formaldehyde emissions than the panel surfaces.

III. Purchase Recommendations

1. Give priority to products labeled with E₁-grade, E0-grade, or ENF-grade certifications and request the merchant to provide testing reports;
2. Check the edge-sealing workmanship to ensure that the panel edges are smooth and not exposed;
3. Avoid choosing office chairs with a strong pungent odor. Newly purchased products should be ventilated for a period of time before use.