Abstract: Cowdung poison is commonly known as sani powder poison in local tamil language in south india, it is a lethal poisonous synthetic chemical . Cow dung was traditionally used as a germicide & insect repellent to clean homes, courtyards & temples in the state of Tamil Nadu, since the unavailability of cow dung synthetic chemicals are used to prepare this sani powder. sani powder poison is available in two colours that is yellow and green .