| Chemical Abstract Number (CAS #) |
465736
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| Synonyms | Isodrin |
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Hexachlorohexahydro-endo,endo-dimethanonaphthalene | 1,2,3,4,10,10-Hexachloro-1,4,4a,5,8,8a-hexahydro-1,4:
5,8-endo,endo-dimethanonaphthalene |
| Analytical Methods |
EPA Method 617 |
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EPA Method 8081 |
| Molecular Formula | C12H8Cl6 |
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| Use | Discontinued insecticide
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| Apparent Color | CRYSTALS
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| Melting Point | 240-242 DEG C
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| Molecular Weight | 364.90
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| Sensitivity Data | Isodrin is a skin irritant.
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| Environmental Impact | Release of isodrin to the environment is not expected to be significant since isodrin is no
longer manufactured or used commercially in the United States. If released to soil, isodrin may
undergo microbial oxidation to endrin by a mechanism analogous to the biooxidation of aldrin to
dieldrin. The mobility of isodrin in soil may range from moderately mobile to immobile and isodrin
is not expected to hydrolyze in moist soils or volatilize from soil surfaces. Based on experimental
data, the half-life of isodrin in soil has been estimated to range from 0.5 years to a maximum of 6
years. If released to water, isodrin may bioconcentrate in aquatic organisms, adsorb to suspended
solids and sediments, volatilize (calculated half-life 5.4 days in rivers) and undergo very slow
microbial transformation, possibly to endrin. Isodrin is not expected to hydrolyze since it contains
no hydrolyzable functional groups. If released to air, isodrin should occur mostly adsorbed to
particulate matter. It may undergo phototransformation possibly forming photoisodrin or isodrin
vapor may react with photochemically generated hydroxyl radicals (calculated vapor phase
half-life 35.5 minutes). .
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| Environmental Fate | TERRESTRIAL FATE: If released to soil, isodrin may undergo microbial oxidation to
endrin by a mechanism analogous to the biooxidation of aldrin to dieldrin. The mobility of isodrin
in soil may range from moderately mobile to immobile and isodrin is not expected to hydrolyze
since it contains no hydrolyzable functional groups. Isodrin should not volatilize significantly from
soil surfaces. The maximum degradation half-life of isodrin in soil has been estimated to be 6 years
based on 85% removal in 14 years of 448 kg isodrin/hectare mixed uniformly throughout the
profile of sandy loam soil . Based on other experimental data, the half-life of isodrin has been
estimated to be 0.5 to 1.0 years . It is absorbed by roots of plants and is likely to be
translocated to above ground parts of plants .
AQUATIC FATE: If released to water, isodrin may bioconcentrate in aquatic organisms, adsorb
to suspended solids and sediments undergo very slow microbial transformation, possibly to
endrin, volatilize (calculated half-life 5.4 days in rivers) and undergo phototransformation,
possibly to photoisodrin. Isodrin is not expected to hydrolyze since it contains no hydrolyzable
functional groups.
ATMOSPHERIC FATE: If released to air, isodrin may undergo phototransformation possibly
forming photoisodrin or isodrin vapor may react with photochemically generated hydroxyl
radicals (calculated vapor phase half-life 35.5 minutes).
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| Drinking Water Impact | SURFACE WATER: Water samples taken from Wolf River,WI and Cypress Creek in
Memphis, Tenn during 1967 10 samples, 30% pos, range of isodrin residues detected 0.09-0.73
ppm, average concn. 0.30 ppm . Isodrin has been qualitatively identified in the Sheboygan
River,WI Fox River,WI and in Green Bay .
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