A METI acaricide; inhibits mitochondrial electron transport at complex I (Ki = 0.36 nmol/mg protein in rat brain mitochondria); induces 100% mortality of C. malaccensis, D. farina, and T. putrescentia when administered via filter paper contact at doses of 25, 100, and 200 mg/m3, respectively; toxic to rats both orally (LD50s = 570 and 1,100 for female and male rats, respectively) and via inhalation (LD50s = 0.62 and 0.66 mg/L for female and male rats, respectively)