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EC number: 204-688-5 | CAS number: 124-19-6
Table 1: Test results
Only at a test concentration of 100 mg/l a significant inhibition of the respiration was observed. For estimating the EC50 (3 hours) a linear relationship between % inhibition and the common logarithm of the test substance concentration was assumed for concentrations ranging from 31.6 mg/l (test vessel S2) to 100 mg/l (test vessel S1). A linear regression was performed (least squares method) and parameters a and b were obtained:
% inhibition = a * log conc. + b
a = 103.269 b = -136.537
Using the equation and parameters above, the concentration corresponding to an inhibition of 50% was calculated EC50 = ~ 0.7 . 102mg/l
The test substance was assessed for activated sludge respiration inhibition according to OECD 209. The EC50 (3 hours) of Aldehyde C9 Nonylic Food Grade is ~ 70 mg/l. The NOEC is 31.6mg/L.
The test substance was assessed for activated sludge respiration inhibition according to OECD 209. Five concentrations were tested: 1, 3.2, 10, 31.6 and 100mg/L. Only at a test concentration of 100 mg/L was significant inhibition of the respiration observed. Therefore the NOEC is considered to be 31.6 mg/L. For estimating the EC50 (3 hours) a linear relationship between % inhibition and the common logarithm of the test substance concentration was assumed for concentrations ranging from 31.6 to 100mg/l. Using this equation the concentration corresponding to 50% inhibition was calculated to be ~ 70 mg/l.
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