'Hartz Ultraguard Plus Flea & Tick Collar For Dogs' is a biochemical pesticide, insecticide, miticide, and sex attractant or feeding stimulant. Its Federal EPA registration number is: 2596-139. It was originally approved by EPA on 12 Jun 1995. It has a 'Caution' signal word. It has the following active ingredients: Gardona (cis-isomer) and S-Methoprene. It's approved for 4 sites including cats and dogs. It is also approved for 10 pests and pest groups including but not limited to deer tick, fleas, rocky mountain wood tick, and ticks.