What Exactly Are Naphthalene Balls?
Naphthalene balls, often called mothballs, are small balls made of the chemical naphthalene. This substance is a hydrocarbon derived from coal tar or petroleum that has a unique property: it sublimates, meaning it turns directly from a solid into a gas.
This gas is toxic to insects like moths and silverfish, which is why it's used as a pesticide to protect clothes, particularly wool and silk, from their larvae. They are also commonly used in toilets and washbasins as a deodorizer, although they primarily mask odours rather than disinfect. Their affordability and effectiveness have made them a staple in many Indian households for generations.
Understanding The Real Health Risks
The health concerns around naphthalene are real but often misunderstood. The chemical is classified as a possible human carcinogen by agencies like the U.S. Environmental Protection Agency (EPA) and the International Agency for Research on Cancer (IARC). However, the primary danger comes from high levels of exposure or accidental ingestion, not from smelling them occasionally in a well-ventilated space. The most significant acute risk is a condition called hemolytic anemia, where red blood cells are destroyed faster than the body can make them. This is particularly dangerous for small children, who might mistake the balls for candy, and for individuals with a genetic condition called G6PD deficiency, who are much more susceptible to the toxic effects of naphthalene. Symptoms of high exposure can include headaches, nausea, dizziness, and vomiting.
Why The Panic? Separating Fact From Fear
Much of the alarm around naphthalene balls stems from not understanding that toxicity is all about the dose. The scary outcomes, like kidney or liver damage, are typically associated with ingesting the balls or chronic, high-level inhalation in a poorly ventilated area. If you can smell mothballs, you are being exposed to the chemical, but the risk depends on the concentration of the fumes and the duration of exposure. Using them as intended—in sealed, airtight containers—prevents the toxic gas from building up in your living spaces. The problem arises when they are used improperly, such as being scattered in open closets, attics, or gardens to repel rodents or snakes, which is an illegal and ineffective use. This misuse leads to continuous exposure for everyone in the home, especially small children and pets who are closer to the floor where the heavy vapours can accumulate.
The Golden Rules of Safe Usage
You can use naphthalene balls safely by following a few simple rules. First and foremost, only use them to protect clothes and always place them in airtight containers, like sealed trunks or zippered garment bags, along with the clothes. This contains the pesticidal vapour, making it effective against moths while protecting your family from the fumes. Never throw them loosely into closets or drawers. Always keep them out of reach of children and pets. Wash your hands thoroughly after handling them. When you take clothes out of storage, air them out well before wearing to dissipate any lingering fumes. It's also recommended to wash clothes that have been stored with mothballs before wearing them, especially for infants and young children whose skin can absorb the chemicals.
When to Choose a Natural Alternative
If you're still concerned or have vulnerable individuals at home, there are plenty of excellent, non-toxic alternatives. For protecting clothes, cedar blocks or chips are a fantastic option, as the natural oils in cedar repel moths. You can also make your own sachets using dried herbs like lavender, rosemary, cloves, or mint; these smell pleasant to us but are deterrents for insects. Dried neem leaves are a traditional and effective Indian remedy for keeping pests away from stored garments. For deodorizing bathrooms, focus on good ventilation, regular cleaning, and consider using commercial air fresheners designed for that purpose or natural options like baking soda.
