Chemical Properties
Pale yellow, water-insoluble crystalline
substance.
Uses
Bromethalin is used to control rats and mice indoors and outdoors.
It is more effective against rats.
Definition
ChEBI: Bromethalin is a C-nitro compound.
Hazard
Poisonous; moderately toxic; causes
headache, confusion, personality changes, seizures,
coma, death.
Metabolic pathway
Bromethalin is a complex molecule possessing several functional groups
and rapid and multi-pathway metabolism would be expected. There is a
dearth of information published on its environmental fate and metabolism
in plants but some limited information on metabolism in rats is
available.
Toxicity evaluation
Bromethalin is produced by reaction of 2,4-dinitro-6-
trifluoromethyl methylaniline with 1,2,3,5-tetrabromobenzene
(15).
This compound has been known for some time to have
rodenticidal properties (16) but has only recently been
made available. Bromethalin is used in baits at a concentration
of 0.005 or 0.01% and is effective against rodents
resistant to anticoagulants. It does not induce bait shyness.
Anorexia occurs after an effective dose has been consumed.
The mode of action is by uncoupling oxidative phosphorylation
in cells of the central nervous system. Symptoms
of poisoning include tremors, convulsions, prostration, and
hind-limb paralysis. No specific antidote is available but a
symptomatic treatment has been described (17).
Trade Names. Assault (Purina Mills), Vengeance (Dow-
Elanco).
The following acute and subacute compounds are used
for rodent control less frequently than those listed above,
either because they are not widely available or because
restrictions have been placed upon their use due to safety
considerations (11,18).
Degradation
Bromethalin is stable under normal storage conditions but it is degraded
by UV light.
