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EC number: 200-315-5
CAS number: 57-13-6
Low toxicity was demonstrated in Daphnia, freshwater snails and Aedes egypti larvae.
The 24 hour EC50 for urea in Daphnia was reported to be
>10000 mg/l; urea is not acutely toxic to daphnids. The 24 hour LC50
values for freshwater snail eggs, juveniles and adults were reported to
be 14241 mg/l, 18255 mg/l and 22998 mg/l. Following 48 hour exposure,
the LC50value for adults was calculated to be 13477 mg/l.
In another study, the 24 hour LC50values for eggs,
juvenile and adult snails were reported to be 13532 mg/l, 24504 mg/l and
26024 mg/l, respectively. Following 48 hours exposure, the LC50value
for adults was calculated to be 21412 mg/l. It is concluded that, under
normal laboratory conditions, urea displays low molluscicidal activity.
The 4 hour LC50 in mosquito (Aedes aegypti) larvae is
reported to be 60000 mg/l.
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