Fipronil jẹ ipakokoro phenylpyrazole. O ni awọn ipa majele ikun ni akọkọ lori awọn ajenirun, pẹlu pipa olubasọrọ mejeeji ati awọn ipa ọna ṣiṣe kan. O ni iṣẹ ṣiṣe insecticidal giga lodi si aphids, leafhoppers, planthoppers, idin lepidopteran, fo, coleoptera ati awọn ajenirun miiran. Ko ṣe ipalara fun awọn irugbin, ṣugbọn o jẹ majele si ẹja, ede, oyin, ati awọn silkworms.