The label is the law. Rates and restrictions below are taken from the product labels listed under Sources. Your product's own label governs; read it before you mix or apply. Mixing calculator · Disclaimer
- Active ingredient
- 2-Undecanone (methyl nonyl ketone) (CAS 112-12-9)
- Chemical class
- A ketone. The BioUD label lists the same compound as 2-undecanone, CAS number 112-12-9, and calls it botanically derived.[2]
- Mode of action
- Animal repellent: discourages dogs and cats from treated spots rather than killing anything; no IRAC insecticide group[1]
- Signal word
- Grant's Dog & Cat Repellent Granular: Caution[1]
The BioUD tick and mosquito repellent
2-undecanone was also sold as BioUD Clothing & Gear Repellent, a 7.7% spray for skin, clothing, tents and backpacks. Its label claimed up to 4.5 hours against mosquitoes and up to 2 hours against ticks.[2]
EPA's product database now lists that BioUD registration as inactive, so this page covers the dog and cat repellent that is still registered.[3]
Where it is used
Before treating, pick up droppings and rinse soiled spots with water. Strays are drawn back to places where pets have already left feces or urine.[1]
It is for outdoor use only. Keep it off the leaves of shrubs and soft-bodied ornamental plants, and never use it on food or feed crops.[1]
Pair it with training. The label recommends praise for good behavior and a sharply spoken word for bad, and says it won't usually break a dog's established urination habits unless used as a training aid.[1]
Products and registrations
| Product | Registrant | EPA Reg. No. | Active % | Formulation | Signal word |
|---|---|---|---|---|---|
| Grant's Dog & Cat Repellent Granular[1] | Grant Laboratories, Inc. | 1663-30 | 1.9% | ready-to-use granules | Caution |
Label rates
| Product | Use | Pests | Rate |
|---|---|---|---|
| Grant's Dog & Cat Repellent Granular | Outdoors: borders around trees, shrubs, garbage cans or bags, lawns and flower gardens | Dogs and cats | 1 lb product per 250 sq ft[1] Shake it lightly from the container or use a spreader, laying it as a border around what you want protected. Repeat daily, or as needed, until the habit is broken. |
Safety and environmental hazards
People
Signal word CAUTION: harmful if absorbed through skin and causes moderate eye irritation. Frequent skin contact may cause an allergic reaction, so wear long sleeves, long pants, shoes, socks and gloves.[1]
Pets
Don't let the granules touch a person or pet, directly or by drift. Keep people and pets out during application and until the dust settles.[1]
Bees and pollinators
The label has no bee or pollinator statement; it is spread on the ground, not on blooms.[1]
Fish and water
The label's only water-related direction is never to pour unused product down an indoor or outdoor drain.[1]
Common questions
- How long does Grant's Dog & Cat Repellent last?
- Up to 24 hours under ordinary weather, which is why the label says to apply it daily.[1]
- How much do I spread?
- One pound per 250 square feet, sprinkled as a border around the item or area you want to protect.[1]
- Can I use 2-undecanone as a tick repellent?
- BioUD, a 2-undecanone spray for ticks and mosquitoes, is listed as inactive by EPA. Grant's granules are labeled only for repelling dogs and cats outdoors.[3][1]
Sources
- U.S. EPA Pesticide Product Label System, “Grant's Dog & Cat Repellent Granular label, EPA Reg. No. 1663-30 (EPA-stamped, June 17, 2014).” www3.epa.gov/pesticides/chem_search/ppls/001663-00030-20140617.pdf (accessed 2026-10-06)
- U.S. EPA Pesticide Product Label System, “BioUD Clothing & Gear Repellent label, EPA Reg. No. 82669-3 (EPA-stamped, Feb. 17, 2010).” www3.epa.gov/pesticides/chem_search/ppls/082669-00003-20100217.pdf (accessed 2026-10-06)
- U.S. EPA, “Pesticide Product and Label System: EPA Reg. No. 82669-3 (BioUD Clothing & Gear Repellent), product status.” ordspub.epa.gov/ords/pesticides/cswu/ppls/82669-3 (accessed 2026-10-06). EPA lists the product status as Inactive.