ENVIRONMENTAL SCIENCE U.S., LLC · Cypermethrin 24.8% · EPA Reg 101563-234 · INSECTICIDE
Document last checked 2013-06-21
According to the label From the product label
These details were extracted from this product's label PDF.
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Confirm every rate, site, restriction and safety requirement against the label before mixing or applying.
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EPA registration data for Reg. 101563-234 →
Cynoff EC is an emulsifiable concentrate insecticide intended for use by professional pest control operators. Its active ingredient is Cypermethrin (24.8% by weight), which is a synthetic pyrethroid. This product is designed to control a wide variety of pests, including ants, fleas, cockroaches, spiders, wasps, bed bugs, mosquitoes, and various other crawling and flying insects. It can be applied both indoors and outdoors. Indoor applications include treating cracks, crevices, baseboards, and window/door frames, while outdoor applications involve treating cracks, crevices, eaves, and vegetation. When used indoors, it should be applied to specific target areas rather than as a space spray. For outdoor use, it is limited to crack-and-crevice treatments and certain vegetation applications. Always follow specific dilution rates: 0.1% for certain pests like ants and fleas, and 0.2% for bees and cockroaches. Users must wear appropriate Personal Protective Equipment (PPE), including long-sleeved shirts, long pants, shoes, socks, and chemical-resistant gloves when using handheld nozzles. Avoid contact with skin, eyes, or clothing, and do not breathe vapors or spray mist. The product is highly toxic to fish and aquatic invertebrates; avoid runoff into drains or water bodies. Re-entry interval (REI) is not explicitly listed in the provided text, but users should follow all precautionary statements regarding occupant safety.
Pests covered (23)
Ants, Fleas, Cockroaches, Spiders, Wasps, etc.COCKROACHESCRICKETSBEESWASPSANTSBOXELDER BUGFLIESBITING FLIESCLUSTER FLYMOSQUITOESEARWIGSFLEASFIREBRATSILVERFISHPILLBUGSSOWBUGSCENTIPEDESMILLIPEDESSPIDERSTICKSCHIGGERS (REDBUGS)ELM LEAF BEETLE
Areas treatable (35)
Cracks, crevices, baseboards, window/door frames, etc.Cracks, crevices, eaves, vegetationDRIVEWAYSWALKSGREENHOUSE (INDOOR)GREENHOUSE (OUTDOOR)BASEBOARDSDOMESTIC DWELLINGS (INDOOR)HOSPITALS (INDOOR INEDIBLE)HOSPITALS (OUTDOOR INEDIBLE)EATING ESTABLISHMENTS (OUTDOOR INEDIBLE)EATING ESTABLISHMENTS (INDOOR INEDIBLE)RESTAURANTS (INDOOR INEDIBLE)COMMERCIAL/INSTITUTIONAL/INDUSTRIAL BUILDINGS (OUTDOOR INEDIBLE)BUILDING FOUNDATIONS (SOIL TREATMENT)DOMESTIC DWELLINGS (OUTDOOR)PATIOSPORCHESHOTELS/MOTELS/TOURIST COURTS (OUTDOOR)LOCKER ROOMSLABORATORY (UNSPECIFIED)WAREHOUSES (INDOOR INEDIBLE)HOTELS/MOTELS/TOURIST COURTS (NON-FOOD AREAS)FOOD PROCESSING AREAS (INDOOR INEDIBLE)FOOD PROCESSING PLANTS (OUTDOOR INEDIBLE)GARBAGE ROOMSDUMPS (GARBAGE/REFUSE) (OUTDOOR)BUSES (NONFEED/NONFOOD) (RESIDUAL GENERAL TREATMENT)BOATS/SHIPS (RESIDUAL GENERAL TREATMENT)RAILROAD CARS (NONFEED/NONFOOD) (RESIDUAL GENERAL TREATMENT)TRAILERS (EMPTY)TRUCKS (NONFEED/NONFOOD) (RESIDUAL GENERAL TREATMENT)AIRCRAFT (NONFEED/NONFOOD) (RESIDUAL GENERAL TREATMENT)COMMERCIAL/INSTITUTIONAL/INDUSTRIAL BUILDINGS (INDOOR INEDIBLE)SCHOOLS (INDOOR INEDIBLE)
Application instructions from the label 2
Cracks, crevices, baseboards, window/door frames, etc.
Do not use in rooms being used as living, eating, or recovery areas for patients/elderly. Do not use in classrooms.
- Target pest
- Ants, Fleas, Cockroaches, Spiders, Wasps, etc.
- Location
- Indoor
- Dilution
- 0.1% or 0.2%
Cracks, crevices, eaves, vegetation
Limited to crack-and-crevice treatments and specific vegetation applications.
- Target pest
- Ants, Fleas, Cockroaches, Spiders, Wasps, etc.
- Location
- Outdoor
Mixing instructions 2
| For pests |
Per |
Finished strength |
Label notes |
| Ants, Fleas, etc. |
1 oz |
0.1% |
Dilute 1 fl oz per 1 gal of water. |
| Bees, Cockroaches |
1 fl oz |
0.2% |
Dilute 1 fl oz per 1 gal of water. |
Worker safety
PPE required
Long-sleeved shirts and long pants; Shoes; Socks; Chemical resistant gloves for mixers/loaders using handheld/handheld nozzles.
Timing & weather
- Do not apply when windy (wind speeds above 10 mph).
- Do not apply when rain is predicted for the next 24 hours.
Use restrictions 7
- Do not use in rooms being used as living, eating, recovery areas for patients, elderly, or infirm.
- Do not use in classrooms.
- Do not use in areas where food is prepared or served.
- Do not use as a space spray.
- Do not use in greenhouses (non-commercial).
- Outdoor use limited to crack-and-crevice and specific vegetation.
- Do not allow runoff into drains or water bodies.
Active ingredient
Cypermethrin 24.8%
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