Open AccessDetermination of median lethal dose of combination of endosulfan and cypermethrin in wistar rat
Author(s) -
Jaya Raj,
Mohineesh Chandra,
Tirath Das Dogra,
Monika Pahuja,
Anupuma Raina
Publication year - 2013
Publication title -
toxicology international/indian journal of toxicology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.129
H-Index - 26
eISSN - 0976-5131
pISSN - 0971-6580
DOI - 10.4103/0971-6580.111531
Subject(s) - endosulfan , cypermethrin , pyrethroid , chemistry , median lethal dose , toxicology , lethal dose , toxicity , population , pharmacology , dimethyl sulfoxide , body weight , zoology , medicine , pesticide , biology , organic chemistry , environmental health , agronomy
The present study was designed to determine the lethal dose 50 (LD50) of combination of cypermethrin, a pyrethroid, and endosulfan, an organochlorine compound in Wistar rats. LD50 is the amount (dose) of a chemical, calculated as per the concentration of chemicals that produces death in 50% of a population of test animals to which it is administered by any of a variety of methods. A single oral dose of combination of cypermethrin and endosulfan were dissolved in dimethyl sulfoxide (DMSO) in a ratio of 1:1 and administered orally at the concentration of 165 mg/kg body weight (b.w), 330 mg/kg b.w, 660 mg/kg b.w, and 1320 mg/kg b.w to experimental animals. LD50 was calculated according to the method described by Miller and Tainter (1994) and was observed as 691.83 mg/kg b.w for this combination. Single dose of test article at 165 mg/kg b.w did not reveal any toxic signs or behavioral alterations, hence considered as No observed Adverse Effect level (NOAEL).