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
- Metofluthrin
- Chemical class
- The label lists metofluthrin, also coded S1264, at 31.2% on a treated refill cloth that a fan unit spreads into the air around the wearer.[1]
- Mode of action
- Spatial mosquito repellent released by a fan; metofluthrin is not named in the IRAC v11.5 classification text[1]
- Signal word
- OFF! Clip-On Mosquito Repellent (EPA master name NORM 1) with refills: Caution[1]
Outdoor use only
Every panel of this label repeats one rule: do not use it indoors or in enclosed spaces. The suggested settings are outdoor ones, such as camping, fishing, the backyard, the patio or a sporting event.[1]
Don't cover the unit with anything while it runs, and don't poke it with metal tools or touch it with wet hands. Only swap the refill when the fan is switched off.[1]
Where it is used
Hold the refill by its tab, slide it into the unit, and twist the top to lock it. Twist further to switch the fan on, then clip it to your belt, waistband or purse.[1]
You can also set it on a table or bench next to you. Lay it on its clip so air circulates, away from food and from heat, flames or moisture.[1]
If you move to a new spot, give the unit a few minutes to rebuild its protection around you.[1]
Replace the refill and batteries when the warning light goes out and you no longer feel air blowing. Each refill lasts up to 12 hours of use.[1]
Products and registrations
| Product | Registrant | EPA Reg. No. | Active % | Formulation | Signal word |
|---|---|---|---|---|---|
| OFF! Clip-On Mosquito Repellent (EPA master name NORM 1) with refills[1] | S.C. Johnson & Son, Inc. | 4822-542 | 31.2% | treated refill cloth in a battery fan unit | Caution |
Safety and environmental hazards
People
Signal word CAUTION: harmful if swallowed, inhaled or absorbed through the skin. Don't touch the treated refill cloth, avoid breathing the vapor, and wash your hands right after handling a refill.[1]
Pets
The label says to keep the unit out of reach of pets and store it away from pet food. Children should not handle it.[1]
Bees and pollinators
The label carries no bee or pollinator statement.[1]
Fish and water
The only environmental hazard listed is not to apply it to water. Never put a partly used refill down any drain; ask your local solid waste agency how to dispose of it.[1]
Common questions
- Can I use the OFF! Clip-On inside my house or tent?
- No. The label says not to use it indoors or in any enclosed space.[1]
- How long does an OFF! Clip-On refill last?
- Up to 12 hours of use. You can switch it off and use the rest later, but the label says to replace a refill a set number of days after opening or after 12 hours, whichever comes first.[1]
- What if I touch the refill cloth?
- Take off any clothing it touched and rinse your skin with plenty of water for 15 to 20 minutes. Call a poison control center or doctor for advice.[1]
Sources
- U.S. EPA Pesticide Product Label System, “OFF! Clip-On Mosquito Repellent (NORM 1) label, EPA Reg. No. 4822-542 (EPA-stamped, June 2, 2014).” www3.epa.gov/pesticides/chem_search/ppls/004822-00542-20140602.pdf (accessed 2026-10-06)