Common Sources of Formaldehyde in Homes
Formaldehyde is one of the most common indoor air pollutants—and most people don’t even realize it’s in their homes. A colorless gas released from building materials, furniture, fabrics, and many everyday products, high concentrations of formaldehyde can irritate the eyes and throat and contribute to poor indoor air quality. Understanding where formaldehyde comes from is the first step in reducing it.
Building Materials & Furnishings
Composite and pressed wood products (e.g., plywood, particleboard, medium-density fiberboard or MDF)
Furniture made with engineered wood (especially if unfinished or with minimal sealing)
Insulation (especially urea-formaldehyde foam insulation in older homes)
Cabinets and shelving made from pressed wood
Mattresses, cushions, and foam products (can off-gas formaldehyde-based chemicals)
Certain flooring types, including:
Engineered hardwood
Laminate flooring
Vinyl flooring and luxury vinyl tile (LVT)
Carpet & carpet tile
Glues and adhesives (especially those used in construction or crafts)
Paints, finishes, and varnishes (especially oil-based or older formulations)
Wall coverings (some wallpapers and paneling)
Certain caulks and sealants
Some cleaning products and disinfectants (may contain formaldehyde as a preservative)
Other Sources
Textiles treated with wrinkle-resistant or stain-repellent finishes
Air fresheners and some scented products (can release formaldehyde as a secondary byproduct)
Combustion byproducts from candles, kerosene heaters, or incense
Permanent-press fabrics (shirts, curtains, drapes, upholstery)
Cigarette smoke
Fuel-burning appliances (gas stoves, fireplaces, etc.)
Note: This list highlights typical sources of formaldehyde in homes, but it may not include all potential sources. Product formulations vary, so some items listed may not contain formaldehyde. For accurate information, review the product label or consult its Safety Data Sheet (SDS), often available online.
