presentation enviromental chemistry 1.pptx

Environmental Chemistry topics

1. Fipronil Fipronil is a chemical which is used as insecticide. Fipronil belong to chemical family phenylphyrazol . These are white powder with a moldy odor. Fipronil is used to control Ants, termites, rootworms, weevils, and many others insects. First registered for used in United state.

2. structure  5-amino-1-(2-6-dichloro-4-( trifluoromethyl )phenyl)-4-(( trifluoromethyl ) sulfinyl )-1H-pyrazole-3-carbonitrile

3. How does fipronil works? Fipronil kills insects when they eat it or come in contact with it. Fipronil works by disrupting the normal function of central nervous system in insects. Fipronil is more toxic to insect than human and pets.

4. What happens to fipronil when it enter the human body? Fipronil enter the human body through skin and orally. Once in the body, fipronil is found in fatty tissue, and breaks down in smaller chemicals called metabolites. These metabolites are than removed from the body mostly through feces and also in the urine .

5. Sign of toxicity Clinical signs and symptoms reported after ingestion of fipronil by human include. Sweating, nausea, agitation, weakness, dizziness, headache, abdominal pain. These signs of exposure to fipronil are generally reversible and resolve spontaneously.

6. What happens to fipronils in the enviroments In the soil, naturally occurring organisms breakdown fipronil into its metabolites. Breakdown by sunlight. It has very short half life about 125 days. Fipronil does not mix very well with water. Less soluble in water.

7. Advantages and disadvantages They play a critical role in controlling insect-born diseases and preserving crop health. Protecting or increasing yields in food production. T hey are used in seed coating.

8. However the use of insectides can have negative impact on non-targeted species. The environment and human health. Excessive use of insecticides has led to the disturbance of normal balance of nature and deline of some living species. These chemical can cause acute poisoning and long-term health effects.