Why Mothballs Vanished From American Closets

The little white balls that once sat in every grandmother’s closet have all but vanished from American homes, and the reason has nothing to do with moths losing interest in wool.

Quick Take

Synthetic fabrics, home climate control, and better pest tools have replaced most mothball use.
Mothballs contain naphthalene or paradichlorobenzene, both regulated as insecticides by the Environmental Protection Agency (EPA).
Health agencies have linked heavy exposure to liver damage, blood cell breakdown, and possible cancer risk.
The European Union banned naphthalene mothballs outright in 2008, pushing the shift further worldwide.

A Household Staple Fades From the Closet

Mothballs were once a fixture of American life, a cheap way to keep clothes moths from chewing through wool sweaters and coats. That need has shrunk. Closets today hold cotton blends, polyester, and other synthetic fibers that moths simply do not eat. Homes also stay cooler and drier thanks to air conditioning, which moths dislike. Add modern pest control sprays and traps, and the old mothball loses its job.

The product itself never disappeared from store shelves entirely, but its role narrowed. Government records show that as recently as the 2000s, roughly five million pounds of paradichlorobenzene were sold in the United States each year, and most of that went straight into mothballs. That number reflects a product still in circulation, just far less central to daily life than it once was.

Why Regulators Started Watching the Chemistry

Mothballs are not a harmless deodorizer. Federal regulators classify them as insecticides, meaning they are built to kill insects through chemical exposure, not simply mask odors. The two active ingredients, naphthalene and paradichlorobenzene, work by releasing fumes that are toxic to moths and their larvae. Those same fumes do not stop at the closet door, which is exactly why federal agencies began treating mothballs as a product needing tighter labeling and safety rules.

Enforcement has followed the concern. The EPA once fined fifteen businesses across California, Hawaii, Nevada, and Guam a combined $202,614 for selling unregistered insecticides, including products marketed for moth and pest control, that posed risks to children. That case shows regulators treating mothball-type products as serious enough to police, not as a quaint household item left alone by law.

The Health Warnings Behind the Decline

Naphthalene exposure through breathing, touching, or swallowing has been tied to hemolytic anemia, a condition where red blood cells break down faster than the body can replace them, along with liver damage and nervous system harm. The EPA has also classified naphthalene as a possible human carcinogen, placing it in a category reserved for chemicals with credible cancer risk in animal studies. Regulators later added new packaging rules specifically to keep children from swallowing mothballs by accident.

Public health officials have echoed the caution directly. The Centers for Disease Control and Prevention has stated plainly that excessive or inappropriate mothball use for odor and insect control is inadvisable, given how widely people’s sensitivity to the chemical varies. Some individuals, including people with a common blood enzyme deficiency, face sharper risk of red blood cell damage from even routine exposure.

A Global Shift Away From the Little White Balls

The United States is not alone in stepping back from mothballs. The European Union banned naphthalene-based mothballs across all member countries back in 2008, citing safety concerns tied to the chemical’s health effects. That move reflected a broader European push to restrict household products that release chemical vapors indoors over long periods, a category mothballs fit squarely into.

Other governments have weighed similar steps. Officials in Taiwan considered curbing mothball use in public buildings after a citizen petition raised concerns about hemolysis risk, particularly for people with a genetic sensitivity to the chemical. These international moves did not happen in isolation. They tracked the same scientific findings driving policy conversations inside the EPA.

What Replaced the Smell of Mothballs

Mothballs trace back to the early 1800s, when chemists first experimented with naphthalene’s strong, distinctive odor, though the product as commonly known was not formalized until 1948. For generations, that sharp smell meant protected wool. Today, cedar blocks, sealed storage containers, and synthetic fabrics do the job without the fumes. The shift reflects a simple trade: convenience and comfort now come with far less chemical exposure inside American homes.