ddt: banned but still with us?
TRANSCRIPT
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DDT: Banned But Still With
Us?
Jenkins Macedo, ES&P 14
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What is It?
Organic pollutant
Insoluble in universal solvent
(water)
Residence period 20-30 years
It bio-accumulates in our food chain
Toxic and carcinogenic
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Forms of DDTDDE
DDD
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Uses?
Household Use
Agricultural Use
Malaria and other Diseases Control
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Spatial Distribution Poverty and Malaria
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DDT TOXICOLOGY
Moderate Toxicity(Warning)
Low Toxicity(Caution)
Very Low Toxicity
(Caution)
HighToxicity(Danger)
Oral LD50
Less than 50 mg/kg 50 - 500 mg/kg 500 - 5000 mg/kg
Greater than 5000 mg/kg
Inhalation LC50
Less than 0.2 mg/l 0.2 - 2 mg/l 2 - 20 mg/l Greater than 20 mg/l
Dermal LD50 Less than 200 mg/kg 200 - 2000 mg/kg
2000 - 5000 mg/kg
Greater than 5000 mg/kg
Eye Effects Corrosive Irritation persisting for 7
days
Irritation reversible within
7 days
No irritation
Skin Effects Corrosive Severe irritation at 72 hours
Moderate irritation at 72
hours
Mild or slight irritation at 72
Source: National Pesticide Information Center (2000)
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Federal and International Regulatory Agencies