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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

Administrative data

Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-11-01 to 2019-11-20
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: OECD Guideline; EU Method; GLP

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2019
Report date:
2019

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
(2Z)-2-fluoro-3-(morpholin-4-yl)acrylaldehyde
EC Number:
813-789-9
Cas Number:
152873-67-1
Molecular formula:
C7H10FNO2
IUPAC Name:
(2Z)-2-fluoro-3-(morpholin-4-yl)acrylaldehyde
Test material form:
solid
Specific details on test material used for the study:
Name: Fluormorpholinylacrylaldehyd (FMA)
Batch No.: BXR82PT
Purity: 86.7 % according to the certificate of analysis (from January 26, 2018), given in the Study Plan
Purity: 98.6 % according to the certificate of analysis (after reanalysis of the test item)
Certificate of Analysis Date: September 04, 2019 (reanalysis of the test item);
January 26, 2018 (given in the Study Plan)
Aggregate State at Room Temperature: Solid
Colour: Orange-brownish
Expiry Date: August 21, 2019 after reanalysis
(November 01, 2018 ccording to the certificate of analysis from January 26, 2018 given in the Study Plan)
Storage Conditions at the Test Facility: After receipt at the test facility for 7 days at 4 ± 4 °C until storage recommendations were provided; thereafter at 20 ± 5 °C in the dark.

Sampling and analysis

Analytical monitoring:
yes
Remarks:
HPLC-UV
Details on sampling:
Duplicate samples from the freshly prepared test media of all test concentrations and the control were taken at the start of the test.
For the determination of the stability of the test item under the test conditions and of the maintenance of the test item concentrations during the test period, duplicate samples from the test media of all test concentrations and the control were collected at the end of the test (after 48 hours) by pouring together the contents of the test beakers of each treatment.

Test solutions

Vehicle:
no
Details on test solutions:
Test Concentrations: 10, 4.5, 2.1, 0.9 and 0.4 mg test item/L (spacing factor 2.2) and a control.
Control: In the control, test water was used without addition of the test item.
Dosage of Test Item:
The test medium of the highest test concentration of nominal 10 mg test item/L was prepared by dissolving 10.2 mg test item into 1020 mL test water by intense stirring for 15 minutes. Adequate volumes of this test medium were diluted with test water to prepare the test media of the other desired test concentrations.
The test media were prepared just before introduction of the daphnids (= start of the test).
Appearance of the Test Item in Test Medium: There were no remarkable observations.

Test organisms

Test organisms (species):
Daphnia magna
Details on test organisms:
Species: Daphnia magna (Straus), clone 5
Age at Test Start: From 1.5 to 20 hours old
Sex: Female
Origin: The Daphnia introduced in the test were taken from ibacon's in house laboratory culture.
Breeding Conditions: The Daphnia were bred in the laboratories of ibacon under similar temperature and light conditions as used in the test. The cultivation of the parental Daphnia was performed in Elendt M4 medium. The test organisms were not first brood progeny. The Daphnia in the stock culture were fed at least on all working days with green algae (Desmodesmus subspicatus) freshly grown in the laboratories of ibacon.

Study design

Test type:
static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
48 h

Test conditions

Hardness:
Water Hardness: 2.5 mmol/L (= 250 mg/L) as Calcium Carbonate
Test temperature:
20 °C at test start;
20 °C at test end
pH:
7.8 - 7.9 at test start;
7.5 - 7.8 at test end; and thus the pH-value did not vary by more than 1.5 units
Dissolved oxygen:
8.8 to 8.9 mg/L at test start;
8.8 to 8.9 mg/L at test end

Nominal and measured concentrations:
10, 4.5.5, 2.1, 0.9 and 0.4 mg test item/L and a control
Details on test conditions:
Test Environment: Controlled environment room
Measurement of pH, Dissolved Oxygen and Water Temperature:
The water temperature, pH-values and dissolved oxygen concentrations were determined at test start and test end in each treatment group.
Water Temperature: 20.0 to 20.3 °C at test start;
19.7 to 20.1 °C at test end
pH-Values: 7.8 to 7.9 at test start; 7.5 to 7.8 at test end; and thus the pH-value did not vary by more than 1.5 units
Dissolved Oxygen Concentration: 8.8 to 8.9 mg/L at test start;
8.8 to 8.9 mg/L at test end
Light Regime: 16 h light : 8 h dark
Light Intensity: The light intensity was 210 to 370 lux (measured once during the test).
Recording: Test conditions were recorded with suitable instruments and documented in the raw data.
Reference substance (positive control):
yes
Remarks:
, For the evaluation of the quality of the Daphnia clone and the consistency of the experimental conditions, the reference item potassium dichromate is tested at least twice a year to demonstrate satisfactory test conditions.

Results and discussion

Effect concentrationsopen allclose all
Key result
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
4.5 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Duration:
48 h
Dose descriptor:
NOEC
Effect conc.:
2.1 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Duration:
48 h
Dose descriptor:
LOEC
Effect conc.:
4.5 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
mobility
Details on results:
After 48 hours of exposure no immobilisation of the test animals was observed in the control and up to the test item concentration of 2.10 mg test item/L. At the concentration of 4.5 mg test item/L 10 daphnids were immobile. At the highest test item concentrations of 10.0 mg test item/L 20 daphnids were immobile, respectively.
Results with reference substance (positive control):
In the most recent test with the reference item potassium dichromate the EC50 after 24 hours was determined to be 1.58 mg test item/L, indicating that the sensitivity of the Daphnia was consistent with the level proposed by the OECD 202 guideline (EC50-24 h between 0.6 and 2.1 mg potassium dichromate/L).
Reported statistics and error estimates:
The 24-hour and 48-hour EC50, EC20 and EC10 and the 95 % confidence limits were calculated by Probit analysis.
The NOEC and LOEC after 24 and 48 hours were calculated by Step-down Cochran Armitage test procedure.
The software used to perform the statistical analysis was ToxRat Professional, Version 3.2.1, ToxRat Solutions GmbH.

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Remarks:
, Control Immobilisation Rate was 0 % and furthermore no daphnid showed signs of disease or stress. Dissolved Oxygen Concentration was above or equal 8.8 mg O2/L in the control and test vessels at the end of the test.
Conclusions:
The toxic effect of the test item Fluormorpholinylacrylaldehyd (FMA) to Daphnia magna was assessed in a static concentration-response test. The 48-hour NOEC was determined to be 2.1 mg test item/L. The 48-hour LOEC was determined to be 4.5 mg test item/L and the 48-hour EC50 value was determined to be 4.5 mg test item/L. The initial concentrations and the maintenance of the exposure concentrations during the test were verified in the analytical part. All reported results refer to nominal values since the concentrations of the test item were within ± 20% of the nominal concentrations during the test.
Executive summary:

Title:

Fluormorpholinylacrylaldehyd (FMA): Acute Toxicity to Daphnia magna in a Static 48-hour Immobilisation Test

Purpose:

The purpose of this study was to determine the influence of the test item Fluormorpholinylacrylaldehyd (FMA) on the mobility of Daphnia magna.

For this purpose, young daphnids (< 24 hours old) were exposed in a static test to various concentrations under defined conditions for 48 hours. The recorded effects were the mobility of the daphnids after 24 and 48 hours. The test method of application and the test system are recommended by the test guidelines and Daphnia magna is the recommended test species. The purpose of the analytical part of this study was to verify the concentrations of the test item in the test medium.

Guidelines:

-OECD Guideline for Testing of Chemicals No. 202: "Daphnia sp., Acute Immobilisation Test" adopted April 13, 2004

-SANCO/3029/99 rev.4 11/07/00: Residues: Guidance for generating and reporting methods of analysis in support of pre-registration data requirements for Annex II (part A; Section 4) and Annex III (part A; Section 5) of directive 91/414

Materials and Methods

Test Item:

Fluormorpholinylacrylaldehyd (FMA); batch no.: BXR82PT; purity: 98.6 %, according to certificate of analysis

Test Species:

Female Daphnia magna, clone 5; 1.5 to 20 hours old

Source: The daphnids introduced in the test were taken from ibacon's in-house laboratory culture.

Test Design:

This study encompassed 6 treatment groups (5 dose rates of the test item and a control) each containing 20 individuals. The mobility of the daphnids was determined in a static 48-hour test by visual observation after 24 and 48 hours.

Endpoints:

Number of immobile organisms after 24 and 48 hours

Test Concentrations:

10, 4.5, 2.1, 0.9 and 0.4 mg test item/L (spacing factor 2.2) and a control.

Test Conditions:

Water temperature: 19.7 to 20.3 °C; pH value: 7.5 to 7.9; dissolved oxygen concentration: 8.8 to 8.9 mg/L; photoperiod: 16 h light - 8 h dark; light intensity: 210 to 370 lux; and thus were within the ranges requested by guideline OECD 202

 

Results

Biological test results:

After 48 hours of exposure no immobilisation of the test animals was observed in the control and up to the test item concentration of 2.10 mg test item/L. At the concentration of 4.5 mg test item/L 10 daphnids were immobile. At the highest test item concentrations of 10.0 mg test item/L 20 daphnids were immobile, respectively.

Analytical test results:

The quantification of the test item Fluormorpholinylacrylaldehyd (FMA) in the test samples was performed using liquid chromatography with UV detection.

At the start of the test and after 48 hours test duration 102 % of the nominal test concentrations were found (average of all test concentrations).

 

Conclusion:

The toxic effect of the test item Fluormorpholinylacrylaldehyd (FMA) to Daphnia magna was assessed in a static concentration-response test. The 48-hour NOEC was determined to be 2.1 mg test item/L. The 48-hour LOEC was determined to be 4.5 mg test item/L and the 48-hour EC50 value was determined to be 4.5 mg test item/L.

The initial concentrations and the maintenance of the exposure concentrations during the test were verified in the analytical part. All reported results refer to nominal values since the concentrations of the test item were within ± 20% of the nominal concentrations during the test. This study is classified as acceptable and satisfies the guideline requirements for an acute toxicity study with freshwater invertebrates.