A chemical called 1,4-dichlorobenzene, or 1,4-DCB, could harm your lungs.
It is found in air fresheners, toilet deodorizers, and mothballs, and is present in the blood of nearly all Americans. 1,4-DCB is the chemical that gives mothballs their distinctive smell.
The finding came as part of a National Institutes of Health study that looked at 11 household chemicals. All 11 chemicals are emitted as gasses by common household products. 1,4-DCB was the only chemical in the study which was linked to lung damage.Those who had the highest amounts in the chemical in their blood showed diminished lung function, which could be serious for those with asthma or other lung problems. Reduced lung function is also a risk factor for heart disease, stroke, and lung cancer.