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EC number: 939-253-5
CAS number: 68424-85-1
In reliable guideline studies, the 96 hour LC50 for C12-C16 ADBAC in freshwater fish was 0.515 and 0.85 mg a. i. /L in Lepomis macrochirus and Salmo gairdneri, respectively.
A guideline study was conducted to evaluate
the acute toxicity of C12-C16 ADBAC to Lepomis macrochirus (Bluegill
sunfish) under static conditions. In this study, the nominal test
substance concentrations were as follows: 0, 0.180, 0.320, 0.490, 0.560
and 0.750 mg/L, which is equivalent to mean measured test concentrations
of 0, 0.1973, 0.3171, 0.4555, 0.515 and 0.638 mg a.i./L. Analytical
determination was performed for the test substance. Twenty fish per
concentration in two replicates were exposed to each test concentration
and control. The test and control solutions were renewed at 24, 48 and
72 hours. Observations of symptoms of toxicity and mortality were made
at 24, 48, 72 and 96 hours. The LC50was calculated based on
measured concentrations following a binomial method. Based on the
results obtained, the 96 hour LC50and NOEC of the test
substance were calculated to be 0.515 mg a.i./L (c.i.: 0.456-0.638 mg/L)
and 0.456 mg a.i./L respectively, based on corrected mean measured test
concentrations (Pate Ho and McIntyre DO, 1991).
A guideline study was performed using 2
batches of five rainbow trout (Salmo gairdneri) per concentration
under static conditions. Fish were exposed to different concentrations
(i.e., 0, 0.5, 0.7, 1.0, 1.4, 2.0, 3.5 and 10.0 mg a.i./L) of 50% active
test substance for 96 hours. No chemical analysis of test concentrations
was performed. All concentrations reported were nominal. Apart from the
mortality rate, abnormal findings during the exposure period in the
swimming behaviour, visible physiological functions as well as in the
outward appearance of fish were recorded. The test substance showed a 96
hour LC0value of 1.4 mg/L (equivalent to 0.7 mg a.i./L), LC50value
of 1.7 mg/L (equivalent to 0.85 mg a.i./L) and 96 hour LC100value
of 3.5 mg/L (equivalent to 1.75 mg a.i./L) (Dommrose AM, 1987).
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