Chemical Properties
Aldrin is an organochlorine insecticide, synthesized by J. Hyman in 1948, and its insecticidal activity was introduced by C.W. Kearns in 1949. Pure product is white crystal, odorless, melting point 104~104.5℃, density 1,56, vapor pressure at 20℃ is 99.99 Pa, insoluble in water, moderately soluble in petroleum, soluble in acetone, benzene and xylene. Industrial raw powder is brownish-yellow flaky crystals, containing about 95% of the active ingredient, melting point is 100-102 ℃. Chemically stable, it is stable in organic alkali, inorganic alkali, alkaline oxidizer, and more stable in acidic solution. But in strong acid, strong oxidizer and phenol is decomposed and failed. It does not burn, but is somewhat corrosive due to the slow release of hydrogen chloride during storage. Aldrin is highly toxic to higher animals, acute oral LD50 for rats is 67 mg/kg, and it is highly toxic to fish. Aldrin is mainly used for soil treatment, in the soil is easy to oxidize into Dieldrin highly toxic organochlorine insecticides, long time residue in the soil, belongs to the soil residual pesticides. Mainly used for seed mixing to control locusts, ants, root maggots, mole crickets, grubs, bedbugs, weevils and golden needles and other subterranean pests, and used for direct control of termites with oil sprays. Because of its high toxicity and residual toxicity. Restricted use in most countries. China does not produce or import it. Aldrin has strong poisoning effects of touch and stomach on insects, weak fumigation effect, easy to volatilize, shorter residual period than DDT. It is produced by condensation of dicycloheptadiene and hexachlorocyclopentadiene.
