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EC number: 619-217-2
CAS number: 96487-85-3
No test substance was detected in the
samples from the blank column.
The water solubility of the substance was determined using the column
elution method in a GLP study according to EC A.6, OECD 105 and OPPTS
Quantification was performed by UPLC-MS/MS. The water solubility at 20°C
was determined to be 29.5 μg/L. The pH of the aqueous samples
No inhibition of growth rate was
observed at the concentration tested, i.e. SS at nominal loading rate of
Growth Rate And Percentage Inhibition
For The Total Test Period
Norethyl, average conc. (mg/L)
Growth Rate And Percentage Inhibition At Different Time Intervals
Average conc. (mg/L)
0 – 24 h
24 – 48 h
48 – 72h
Final Test: Test Samples
Time of sampling[hours]
Date of sampling
Percentage of ss2[%]
15 May 2017
30 May 2017
16 May 2017
18 May 2017
were stored in the freezer (≤ -15°C) until the day of analysis.
of a saturated solution (ss) prepared at a loading rate of 100 mg/L.
value, calculated by extrapolation of the calibration curve.
n.d. Not detected. The limit of
detection of the analytical method was determined to be 0.16 µg/L taking
a dilution factor of two into account.
In a 72 h toxicity study conducted according
to OECD guideline 201 and GLP principles, freshwater algae (Pseudokirchneriella
subcapitata) were exposed to Norethyl at a nominal loading rate of
100 mg/L (saturated solution) and an untreated control. Exposure
concentration was verified by a validated analytical method to be 0.0014
mg/L (TWA). No inhibition of growth rate was recorded at the
concentration of Norethyl tested. The 72h-ERC50 was >0.0014 mg/L and the
72h-NOEC was 0.0014 mg/L, based on TWA concentrations. The study is
considered to be reliable without restrictions.
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