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EC number: 200-315-5
CAS number: 57-13-6
The 24 hour EC50 in Daphnia was > 10000 mg/l.
The 24 hour EC50 in Daphnia was > 10000 mg/l; urea is not
acutely toxic to daphnids.
Low toxicity was demonstrated in Daphnia, freshwater snails and Aedes
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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