|Chemical Abstract Number (CAS #)||
|Synonyms||Aldrin||1,4:5,8-Dimethanonaphthalene, 1,2,3,4,10,10-hexachloro-, 1,4,4a,5,8,8a-hexahydro-,
||EPA Method 505||EPA Method 508
||EPA Method 525.2
||EPA Method 608
||EPA Method 617
||EPA Method 625
||EPA Method 8081
||EPA Method 8270
Link to the National Library of Medicine's Hazardous Substances
Database for more details
on this compound.
|Use|| INSECTICIDE (ESP AGAINST TERMITES); INSECTICIDE AGAINST SOIL &
COTTON INSECTS, TURF PESTS, WHITE GRUBS & CORN ROOTWORMS. SRP:
INSECTICIDE HIGHLY EFFECTIVE AGAINST A RANGE OF SOIL-DWELLING PESTS
AT 0.5 TO 5.0 KG/HECTARE. SRP: FORMER USE
Aldrin has been used mainly against insects, primarily soil insects, which attack field, forage,
vegetable, and fruit crops.
Effective against termites, used for wood preservation and to combat ant infestations.
|Consumption Patterns|| ESSENTIALLY 100% AS AN INSECTICIDE
|Apparent Color|| COLORLESS CRYSTALLINE SOLID ; White crystalline substance. ; Colorless needles
; Brown to white, crystalline solid ; Tan to dark brown solid
|Odor|| Mild chemical odor
|Boiling Point|| 145 deg C at 2 mm Hg
|Melting Point|| 104 DEG C
|Molecular Weight|| 364.93
|Density|| 1.6 at 20 deg C/4 deg C (solid)
|Sensitivity Data|| EYE, SKIN, OR RESP IRRITATION .
|Environmental Impact|| Aldrin is no longer produced or used in the United States and any past releases have
probably been converted to dieldrin. Aldrin residues in soil and plants will volatilize from soil
surfaces or be slowly transformed to dieldrin in soil. Biodegradation is expected to be slow and
aldrin is not expected to leach. Aldrin was classified as moderately persistent meaning its half-life
in soil ranged from 20-100 days. Aldrin residues in water will volatilize from the water surface
and photooxidization is expected to be significant. Photolysis has been observed in water,
although the absorption characteristics of aldrin indicate it should not extensively directly
photolyze in the environment. Bioconcentration will be significant. Adsorption to sediments is
expected and biodegradation is expected to be slow. Vapor phase xpected to be slow. Vapor
phase aldrin residues in the atmosphere are expected to react with photochemically erated
hydroxyl radicals with an estimated half-life of 35.46 min. Aldrin in s expected to be adsorbed to
particulate matter and no rate can ed for the reaction of adsorbed aldrin with hydroxyl radicals.
Direct lysis may also occur, in spite of the low absorption of aldrin at >290 nm. r, is expected to
be a slow process relative to reaction with icals. Due to the cessation of aldrin manufacture and
use in the posure of humans in the USA to the chemical is expected to be low.
|Environmental Fate|| TERRESTRIAL FATE: APPLICATION OF ALDRIN AT 3, 9, & 15 KG AI/HA IN
CLAY LOAM & SANDY LOAM SOIL EVERY YEAR FROM 1972-1974 SHOWED
RESIDUES REMAINED LONGER IN CLAY LOAM THAN IN SANDY LOAM SOIL. RATE
OF CONVERSION TO DIELDRIN WAS HIGHER IN SANDY LOAM THAN IN CLAY
LOAM SOIL. ALDRIN RESIDUES LEACHED INTO SOIL WITH RAIN WATER. NEITHER
ALDRIN NOR DIELDRIN TRANSLOCATED IN MAIZE, PEARL MILLET PLANTS &
UNDER MOST ENVIRONMENTAL CONDITIONS ALDRIN IS GRADUALLY
CONVERTED TO DIELDRIN.
AFTER ADDITION OF ALDRIN TO SOIL SAMPLES, WATER SOLUBLE
DICARBOXYLIC ACID WAS ISOLATED. AFTER PREPARATIVE ISOLATION &
METHYLATION, GC, MS SHOWED MATERIAL TO BE IDENTICAL WITH
AUTHENTIC DIHYDROCHLORDENDICARBOXYLIC ACID DIMETHYL ESTER .
TERRESTRIAL FATE: Aldrin was applied at 1.5 kg ai/ha to flooded soil. After 30, 90, 120, 240,
and 270 days, 44.2%, 55.4%, 74.13%, 88.07%, and 100% of the aldrin had dissipated from the
soil . Aldrin applied at 20 lb/6 "in" acre to muck and loam had respective half-lives of 3.75 and
2.40 months for the first half-year and 13.0 and 9.7 months for the following three years . Three
and one-half years following the application to a Miami silt loam of 20 and 200 lb aldrin/6 in acre,
1.12% and 2.55%, respectively, of the calculated initial amount of aldrin remained . Aldrin was
applied 20 lb/6 "in" acre to Miami silt loam and at 100 lb/6 in acre to Plainfield sand . After
incubation for 56 days at 6, 26, and 46 deg C, 83.8%, 55.7% and 13.7% of the initial amount of
recoverable aldrin remained on the Miami silt loam and 63%, 38%, and 10.2% remained on the
Plainfield sand, respectively . After 2 months incubation at 30 deg C, 44%, 58%, and 33% of
about 15 ppm of aldrin applied remained in the Maahas, Louisiana, and Casiguran soils under
upland (80% water saturated), respectively, and under flooded conditions, 65%, 81%, 74%, and
64% remained in the Pila, Maahas< uisiana and Casiguran soils, respectively . Soils were
treated with aldrin at 5 lb/acre from 1958-62 . Dieldrin was formed from aldrin in the soil and
constituted 50 and 90% of the aldrin plus dieldrin residues recovered in 1959 and 1963,
respectively . Soils from AR, FL, HI, MD, MT, OR, and SC were treated with 10 ml of 0.5%
aqueous aldrin emulsion/10 g soil . The preparations were placed randomly around a test site in
the Harrison Experimental Forest in southern Mississippi. In all preparations except the Hawaiian
soil, the percent degradation in the upper 0.5 inch layer (36-72%) was greater than in the lower
layer (unspecified depth) (11-33%). In the Hawaiian soil samples, degradation in the lower layer
was 63% and in the upper layer was 49% . Aldrin was converted into dieldrin in these
studies . When aldrin was applied to agricultural soils in Germany, Spain, England and the
United States, significant amounts of dieldrin derived from the applied aldrin were detected in the
soils within 6 months of aldrin application(6). Aldrin was classified as moderately persistent
meaning its half-life in soil ranged from 20-100 days(7).
AQUATIC FATE: A river die away test was conducted in capped bottles with aldrin in raw water
from the Little Miami River in Ohio. The river receives domestic and industrial wastes and farm
runoff. After 2, 4, and 8 weeks, 20, 60, and 80% of the initial amount of aldrin had degraded .
Volatilization from water is also expected to be significant and will occur at a rate directly
proportional to the rapidity of wind and current velocity and inversely proportional to the depth of
the water body. Bioconcentration and adsorption to sediments are expected to be
significant. Photooxidation is expected to be significant. Biodegradation is expected to be
ATMOSPHERIC FATE: The half-life for the reaction of vapor phase aldrin with photochemically
generated hydroxyl radicals in the atmosphere was estimated to be 35 min . Slow photolysis of
aldrin vapor (60% in one week vs 16% in a dark control) was observed . This is expected due
to the weak absorption of aldrin above 290 nm . Direct photolysis, therefore, is not expected to
be significant compared to reaction with hydroxyl radicals.
|Drinking Water Impact|| SURFACE WATER: Major USA rivers - 100 sites, maximum residue 0.085 ug/l .
Niagara-on-the-Lake, 1980-82, 75 samples, 1% pos, <0.1 ng/l avg . New Jersey - 604 samples,