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Synonyms: (±)-5-amino-1-(2,6-dichloro-α,α,α-trifluoro-p-tolyl)-4-trifluoromethylsulfinylpyrazole-3-carbonitrile (IUPAC)

CAS No.: 120068-37-3

EC No.: 424–610–5

Molecular Weight: 410.4038

Molecular Formula: C12H4Cl2F6N4OS

Structural Formula: fipronil

Form: White solid.
M.p.: 200–201 °C; (tech., 195.5–203 °C)
V.p.: 3.7 × 10-4 mPa (25 °C)
S.g.: 1.477–1.626 (20 °C)
Solubility: water 1.9 at pH 5, 2.4 at pH 9, (all in mg/l, 20 °C). Acetone 545.9, dichloromethane 22.3, hexane 0.028, toluene 3.0 (all in g/l, 20 °C).
Stability: Stable in water at pH 5 and 7; slowly hydrolysed at pH 9 (DT50 c. 28 d). Stable to heat. Slowly degrades in sunlight (c. 3% loss after 12 d continuous irradiation); rapidly photolysed in aqueous solution.


Fipronil is a insecticide which acts as a blocker of the GABA-regulated chloride channel. Insects resistant or tolerant to pyrethroid, cyclodiene, organophosphorus and/or carbamate insecticides are susceptible to fipronil. A broad-spectrum insecticide, toxic by contact and ingestion. Limited xylem systemicity in some monocotyledonous crops. Can be used to control insects when applied as a soil or seed treatment.
To control multiple species of thrips on a broad range of crops by foliar, soil or seed treatment. Control of corn rootworm, wireworms and termites by soil treatment in maize. To control boll weevils and plant bugs on cotton, diamond-back moths on crucifers, and Colorado potato beetle on potatoes, by foliar application. Control of stem borers, leaf miners, planthoppers, leaf folders/rollers and weevils in rice. Foliar application rates range from 10–80 g/ha; soil treatment rates 100–200 g/ha.


95%TC, 200g/l SC, various formulations available, please consult our sales team for more information.

Standard Packaging

 drum, bottle

Pictures coming soon

Risks and Safety Information

Toxic! Class 6

Oral Acute oral LD50( rats 97), mice 95 mg/kg. Skin and eye Acute percutaneous LD50( rats) >2000, rabbits 354 mg/kg. Birds Acute oral LD50 for bobwhite quail 11.3, mallard ducks >2000. Fish Acute LC50 (96h) for bluegill sunfish 85, rainbow trout 248. Bees Highly toxic to honeybees, both by direct contact and by ingestion.

Warning Toxic

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