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WHO Classification of Pesticides Based on Toxicity and Hazard

CLASS	TOXIC RING COLOUR	ACUTE LD50 (RAT) mg/kg body weight
		ORAL		DERMAL
		SOLID	LIQUID	SOLID	LIQUID
1a Extremely Hazardous	RED	5 OR LESS	20 OR LESS	10 OR LESS	40 OR LESS
1b Highly Hazardous	BLUE	5-50	20-200	10-100	40-400
II Moderately Hazardous	YELLOW	50-500	200-2000	100-1000	400-4000
III Slightly Hazardous	BROWN	OVER 500	OVER 2000	OVER 1000	OVER 4000

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Pakistan Agricultural Pesticides Association

909-910, Park Avenue, P.E.C.H.S.,
Shahrah-e-Faisal,
Karachi-75400

Tel:454 1562 Fax:454 6131