Paradichlorobenzene and Pets
Find out if Paradichlorobenzene is toxic to dogs and cats.
Think your pet ate something toxic?
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Paradichlorobenzene, commonly known as PDB or moth repellent, is a pesticide used to protect clothing and stored fabrics from moths and larvae. While it may seem like a harmless household product, it poses a serious poisoning risk to both dogs and cats. Pets can be exposed by chewing on mothballs, licking treated fabrics, or inhaling fumes in poorly ventilated closets and storage areas. Even small amounts can cause significant harm, especially in cats.
Ingestion or inhalation of paradichlorobenzene can irritate the stomach and intestines, leading to vomiting and diarrhea. More dangerously, it can damage the liver and kidneys and, in cats, trigger hemolytic anemia—a condition where red blood cells are destroyed. Neurological symptoms such as tremors, seizures, and difficulty breathing may also occur depending on the amount and duration of exposure.
Because symptoms may not appear immediately and can worsen quickly, any suspected exposure should be treated as an emergency. Keep all moth repellent products, including crystals, cakes, and balls, in tightly sealed containers stored well out of reach of pets. Consider using pet-safe alternatives such as cedar blocks, lavender sachets, or sealed garment storage bags to protect clothing without putting your companion animals at risk.
Prevention is the safest approach. Avoid using paradichlorobenzene products in areas your pets can access, and ensure closets and storage spaces are well ventilated. If you believe your dog or cat has come into contact with this chemical, seek veterinary care immediately and bring the product label with you.
Is Paradichlorobenzene Toxic to Dogs?
Ingestion or inhalation of paradichlorobenzene can cause liver and kidney damage, gastrointestinal irritation, and neurological signs in dogs.
Is Paradichlorobenzene Toxic to Cats?
Cats are especially vulnerable; exposure can lead to hemolytic anemia, liver and kidney damage, tremors, and life-threatening systemic toxicity.
Active Ingredients
- paradichlorobenzene
- 1,4-dichlorobenzene
Pest Targeted
- moths, fabric pests, larvae
Formulation
crystals, flakes, moth balls, cakes
Signal Word
caution
Application Area
closets, storage containers, garment bags, attics
EPA Registration Number
EPA Reg. No. varies by product
Symptoms to Watch For
- Vomiting
- Diarrhea
- Lethargy and weakness
- Loss of appetite
- Increased thirst and urination
- Jaundice (yellowing of gums or skin)
- Pale or brownish gums
- Tremors or seizures
- Difficulty breathing
- Uncoordinated movement
What If My Pet Was Exposed to Paradichlorobenzene?
Contact your veterinarian or a pet poison control center immediately. Do not induce vomiting unless instructed by a professional. Bring the product packaging and an estimate of how much your pet may have ingested or inhaled. Seek emergency veterinary care without delay.
Sources
Vet's Note
PetPilot provides general information for educational purposes. While we reference authoritative veterinary organizations, this page has not been individually reviewed by a veterinarian for your specific pet. Individual animals may react differently based on age, weight, breed, health conditions, and amount consumed. Always consult your veterinarian or a poison control center for personalized advice, especially if your pet is ill, injured, pregnant, nursing, or on medication.