Scented Cleaners Can Fill Indoor Air With Invisible Nanoparticles

Purdue University research shows fragrance compounds from cleaning products react with indoor ozone within minutes, forming 1–30 nm nanoparticles. The effect occurs with both conventional and botanical essential oil-based cleaners, and the respiratory dose can match or exceed standing beside a busy road.

• Nanoparticles of 1–30 nm form within minutes of mopping and wiping surfaces
• Indoor terpene levels can be tens to hundreds of times higher than in a forest
• Far-UV-C lamps raise ozone to 20–40 ppb and intensify particle formation
• Fragrance-free products and ventilation reduce exposure