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EC number: 220-912-4
CAS number: 2935-90-2
Acute data are available for all three trophic levels. A 96-hr LC50 of
1.7 mg/L was identified for the fish species Oncorhynchus mykiss
(rainbow trout). A 48-hr EC50 of 0.55 mg/L was obtained for Daphnia
magna and a 72-hr ErC50 of 0.65 mg/L was found for Scenedesmus
subspicatus (new name Desmodesmus subspicatus). No chronic toxicity data
are available for aquatic organisms. The reference effect level (0.55
mg/L) was taken from the Daphnia study, as this was the most sensitive
species. This value is indicative of an Acute Category 1 classification
(EC, 2008). Furthermore, though MMP is not likely to bioaccumulate based
on the predicted BCF of 3.16 L/kg wwt, MMP has not been shown to rapidly
degrade in the aquatic environment. Also, no chronic data are available
for exposure of MMP to aquatic organisms. Therefore, MMP cannot be
exempted from chronic classification and has an overall classification
of Chronic Category 1, with an M-factor of 1.
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