Name Fipronil Synonyms 5-Amino-1-[2,6-dichloro-4-(trifluoromethyl)phenyl]-4-[(trifluoromethyl)sulfinyl]-1H-pyrazole-3-carbonitrile Molecular Structure Molecular Formula C12H4Cl2F6N4OS Molecular Weight 437.15 CAS Registry Number 120068-37-3 Properties Melting point 200-201 ¨¬C Density 1.477-1.626 Testing Item Standard Testing Result Appearance Off-white crystalline powder Conforms Loss on Drying ¡Â0.5% 0.3% Acidity ¡Â0.5% 0.2% Assay ¡Ã97.0% 97.3%%. 25kgs/drum.
