The Fipronil, with the CAS registry number 120068-37-3,is also known as 5-Amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[(trifluoromethyl)sulfinyl]-1H- pyrazole-3-carbonitrile. It belongs to the product categories of pharmaceuticals;ectoparasiticide;api;insecticide. This chemical's molecular formula is C₁₂H₄Cl₂F₆N₄OS and molecular weight is 437.15.What's more,Its systematic name is 1H-Pyrazole-3-carbonitrile, 5-amino-1-(2,6-dichloro-4-(trifluoromethyl) phenyl)-4-((trifluoromethyl)sulfinyl)-. It is a White SOlid which is a broad spectrum insecticide which actively disrupts the CNS of contacted insects by blocking the passage of chloride ions through GABA receptors.

Physical properties about Fipronil are:
(1)ACD/LogP:  3.975; (2)# of Rule of 5 Violations:  0; (3)ACD/LogD (pH 5.5):  3.98; (4)ACD/LogD (pH 7.4):  3.98; (5)ACD/BCF (pH 5.5):  618.18; (6)ACD/BCF (pH 7.4):  618.18; (7)ACD/KOC (pH 5.5):  3463.23; (8)ACD/KOC (pH 7.4):  3463.23; (9)#H bond acceptors:  5; (10)#H bond donors:  2; (11)#Freely Rotating Bonds:  3; (12)Index of Refraction:  1.618; (13)Molar Refractivity:  81.858 cm³; (14)Molar Volume:  233.684 cm³; (15)Surface Tension:  52.9809989929199 dyne/cm; (16)Density:  1.871 g/cm³; (17)Flash Point:  262.271 °C; (18)Enthalpy of Vaporization:  78.073 kJ/mol; (19)Boiling Point:  510.054 °C at 760 mmHg; (20)Vapour Pressure:  0 mmHg at 25°C.

You can still convert the following datas into molecular structure:
(1)SMILES:FC(F)(F)S(=O)c2c(C#N)nn(c1c(Cl)cc(cc1Cl)C(F)(F)F)c2N;
(2)Std. InChI:InChI=1S/C12H4Cl2F6N4OS/c13-5-1-4(11(15,16)17)2-6(14)8(5)24-10(22)9(7(3-21)23-24)26(25)12(18,19)20/h1-2H,22H2;
(3)Std. InChIKey:ZOCSXAVNDGMNBV-UHFFFAOYSA-N.

Safety Information of Fipronil:
The Fipronil is toxic by inhalation, in contact with skin and if swallowed and toxic to fauna and bees. And it is very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment,it should be avoided release to the environment. Refer to special instructions / safety data sheets. When you use it, wear suitable protective clothing, gloves and eye/face protection.In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) .This material and its container must be disposed of as hazardous waste.

Uses of  Fipronil:
Fipronil is used as the active ingredient in Frontline Top Spot at about 9.8% concentration, and is used together with (S)-methoprene (8.8%) in Frontline Plus, a topical flea and tick control commonly used on dogs and cats. Fipronil(120068-37-3) kills adult fleas before they lay eggs.Fipronil(120068-37-3) is also the active ingredient in GardenTech's Over N Out season long fire ant control product.