Formaldehyde in clothing

Formaldehyde is classified as a known human carcinogen by the International Agency for Research on Cancer (IARC). Despite this, it remains widely used in textile manufacturing as a component of wrinkle-resistant, anti-shrink, and permanent-press finishes.

When you buy a shirt labeled 'wrinkle-free' or 'easy care,' there's a high probability it's been treated with formaldehyde-based resins. These resins cross-link cellulose fibers to prevent creasing, but they also release formaldehyde gas over time — especially when heated during ironing or in warm weather.

Exposure symptoms can include skin irritation, allergic contact dermatitis, watery eyes, and respiratory issues. People who work in clothing retail often report higher rates of these symptoms due to prolonged exposure to new garments.

Regulations vary dramatically by country. Japan limits formaldehyde in clothing to 75 ppm for adults and 20 ppm for children. The EU has similar restrictions. The United States, however, has no federal limits on formaldehyde in clothing.

To reduce exposure: wash new clothes before wearing them (this removes 60-80% of surface formaldehyde), choose garments that don't advertise wrinkle-resistance, and look for OEKO-TEX or GOTS certified products.