Naphthalene and Mothballs:
Ingredients, Vapor Action, Risks

If you are trying to protect stored clothes or blankets, you have probably wondered what are mothballs made of and why they work so well. Many products rely on chemicals that slowly release vapor in enclosed spaces, creating an odor that moths avoid. At the same time, those same vapors can cause problems if you handle mothballs the wrong way or use them where people or pets breathe the air too closely.

Mothball Ingredients: Naphthalene vs Paradichlorobenzene

Mothballs are typically made from either naphthalene or paradichlorobenzene. Both are solid pesticides that slowly turn into vapor. That vapor is what gives mothballs their strong smell and helps repel fabric pests inside sealed storage.

The two ingredients can differ in odor character and how strongly they affect air quality in a given space. For storage and use, the key point is the same: the chemicals are meant to stay contained around the items you are protecting, not to mix with everyday living areas. That is why label directions and proper enclosure matter for safety.

Mothball Ingredients: Naphthalene vs Paradichlorobenzene

1. Check the label for the active ingredient. Look for “naphthalene” or “paradichlorobenzene.” The listed ingredient tells you what chemical is driving the vapor action.
2. Use mothballs only in sealed storage. Place them in a closed plastic tote, airtight storage bag, or tightly lidded cedar chest where the vapor stays around the garments.
3. Avoid open closets and drawers near breathing zones. If mothballs sit out in a room or on shelves, the vapors disperse into the air.
4. Use the amount on the package. Do not pack extras into the same container. Follow the guidance for size and storage duration.
5. Replace when odor fades. When the smell becomes weak inside the closed container, the chemical has largely been used up, and protection drops.

Full Guide: Mothball Ingredients: Naphthalene vs Paradichlorobenzene

Mothball Toxicity: Health Risks and Warning Signs

Because mothballs release pesticide chemicals into the air, they can pose health risks if inhaled, swallowed, or misused. Exposure can irritate the eyes, nose, and throat, and in stronger or prolonged exposures it can lead to headache, nausea, dizziness, or breathing trouble. Risk increases with poor ventilation, use around children, or using mothballs in spaces where people sleep or spend long periods.

This is why mothball toxicity should be treated as a serious chemical hazard, not an odor problem. Follow the product directions closely, and take symptoms seriously as possible exposure signals.

Mothball Toxicity: Health Risks and Warning Signs

1. Watch for irritation symptoms. Stop handling and move to fresh air if you get burning eyes, coughing, throat irritation, or a sudden headache.
2. Know the swallowing risk. Accidental ingestion is especially dangerous for children and pets. If ingestion is suspected, treat it as an emergency and get urgent medical guidance.
3. Recognize that “smell” is a warning sign. Strong odor usually means more vapor is present. If you smell mothballs outside the sealed container, ventilation is not adequate or the container is not sealed.
4. Separate chemicals from living areas. Keep mothballs away from kitchens, bathrooms, bedrooms, and any area where food is stored or prepared.
5. Limit time around unpacked items. When you remove garments from long storage, air them out before wearing, especially if you are sensitive to odors.

Full Guide: Mothball Toxicity: Health Risks and Warning Signs

Mothballs Around Humans and Animals: Safety Basics

Mothballs should be handled as a pesticide product, not a general-purpose odor or storage solution. Safe use depends on placing them only in the intended enclosed storage area, and keeping them away from children, pets, food, and everyday living spaces. The goal is to confine the vapor to the storage container, so people and animals do not inhale it during normal routines.

Practical safety comes down to containment, careful handling, and strict placement. If the container is sealed and you follow label instructions, accidental exposure drops significantly.

Mothballs Around Humans and Animals: Safety Basics

1. Store mothballs in a sealed container with protected items. Use a closed tote, airtight bag, or lidded storage bin, and keep mothballs inside the same container as the textiles.
2. Keep them out of reach. Put mothballs and any packaging immediately in a high cabinet or locked storage area where children and pets cannot access them.
3. Never place mothballs loosely in open areas. Do not set mothballs on shelves, floors, inside drawers that are used daily, or near air vents.
4. Do not store near food or dishes. Keep mothballs away from anything that touches or protects edible items.
5. Ventilate textiles before use. Remove garments and air them in fresh air before wearing or using, particularly after long storage.

Full Guide: Mothballs Around Humans and Animals: Safety Basics

Frequently Asked Questions

What are mothballs made of?

Mothballs are usually made from naphthalene or paradichlorobenzene. These chemicals slowly release vapor, which is what makes them effective against moths in sealed storage conditions.

Why do mothballs smell so strong?

Their strong smell comes from the chemicals evaporating into the air. That vapor is part of how they work, but it also means exposure can be a concern in poorly ventilated spaces.

Are mothballs safe to use around people or pets?

Mothballs should not be used freely around people or pets. They are intended for specific storage use, and accidental exposure can create health risks, especially for children and animals.

Do all mothballs contain the same ingredient?

No. Some contain naphthalene, while others contain paradichlorobenzene. The ingredient can affect the odor, vapor behavior, and safety considerations.