Registration Dossier

Ecotoxicological information

Long-term toxicity to aquatic invertebrates

Administrative data

Endpoint:
long-term toxicity to aquatic invertebrates
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
15th March - 5 April 1995
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The study was conducted to GLP and based on OECD Guideline 202, however a number of devations were made.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1995

Materials and methods

Test guideline
Qualifier:
equivalent or similar to
Guideline:
other: OECD Test Guideline 202 Part II, Daphnia sp., Reproduction Test. Adopted 4th April 1984.
Deviations:
yes
Remarks:
See below
Principles of method if other than guideline:
The conditions under which this range finding work was conducted deviated from the full OECD guideline in the following aspects:
i) The pH of some of the ‘old’ solutions prior to renewal deviated from the initial pH values by > 0.3 pH units, however in each case the deviation was <0.5 units.
ii) Five Daphnia magna were used per test concentration, each individually housed.
iii) A geometric series of at least 5 concentrations was not used.
iv) The pH and dissolved oxygen of the ‘old’ and ‘new’ solutions was measured on 3 of the renewal occasions rather than all 9.
GLP compliance:
yes

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): L-2-Chloropropionic acid referred to in the test report as W717.
- Physical state: Liquid
- Analytical purity: 88.8%
- Purity test date:Not specified
- Lot/batch No.: Bx 071, ADH 05138
- Expiration date of the lot/batch: Not specified
- Storage condition of test material: Ambient temperature in original container.

Sampling and analysis

Analytical monitoring:
yes

Test organisms

Test organisms (species):
Daphnia magna

Study design

Test type:
semi-static
Water media type:
freshwater
Limit test:
no
Total exposure duration:
21 d

Results and discussion

Effect concentrations
Duration:
21 d
Dose descriptor:
EC50
Effect conc.:
> 100 mg/L
Nominal / measured:
meas. (initial)
Conc. based on:
act. ingr.
Basis for effect:
other: Mortality and mobility

Any other information on results incl. tables

 There were no mortalities or signs of toxicity observed in either the control or the test system.The number of offspring (F1) was recorded for each replicate. These data are presented in Table 1.

Table 1.

Test Time

(d)

Number of F1 offspring in control

Number of F1 offspring in 10 mg/L

Number of F1 offspring in 100 mg/L

 

Rep 1

Rep 2

Rep 3

Rep 4

Rep 5

Total

Sum

Rep 1

Rep 2

Rep 3

Rep 4

Rep 5

Total

Sum

Rep 1

Rep 2

Rep 3

Rep 4

Rep 5

Total

Sum

6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

20

21

24

22

18

105

105

24

25

16

26

20

111

111

25

21

22

24

21

113

113

10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

12

49

47

60

50

46

252

357

46

57

61

5

46

265

376

49

43

53

47

56

248

361

13

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

14

 

 

 

 

41

41

398

 

 

1

 

 

1

377

37

32

 

 

 

69

430

15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

41

33

38

37

 

149

547

29

37

40

36

31

173

550

 

 

34

37

36

107

537

17

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19

30

42

37

41

22

172

719

34

33

39

31

35

172

722

29

22

29

42

35

157

694

20

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

21

37

36

 

 

39

112

831

20

4

 

33

33

90

812

41

40

39

33

42

195

889

Sum

177

179

159

150

166

831

 

153

156

157

181

165

812

 

181

158

177

183

190

889

 

 

  The lengths of the surviving P0 Daphnia were recorded at the end of the test period. The mean lengths for the control, 10 and 100 mg/L test systems were 4.4, 4.5 and 4.4mm respectively.

 

Applicant's summary and conclusion

Validity criteria fulfilled:
not specified
Conclusions:
The results do not show any effect due to the test substance when compared to the control sample. As the initial range finding study (reported here) showed conclusively there was no effect on the Daphnia magna at the highest tested concentration, a full study was considered unnecessary.
 
Executive summary:

A GLP study was performed based on OECD Guideline 202 Part II to determine the effect of L-2-Chloropropionic acid onDaphnia magnaover a 21 day period.

An initial range finding study was performed at test solution concentrations of 0, 10 and 100mg/L. Five replicates at each concentration were individually housed in borosilicate glass beakers with a loose fitting lid at 20 +/- 1oC. The test systems were subjected to 16 hour light and 8 hour dark cycles with a 15 minute transition period. The light intensity was measured during the study and gave a value of 484 lux. 

TheDaphniawere fed daily onChlorella vulgarisand a commercially available microencapsulated diet, Frippak Booster.

The test solutions were replaced every Monday, Wednesday and Friday, at which point the ‘new’ test solutions were prepared and the P0generationDaphniawere transferred to the ‘new’ solutions. Any offspring in the test system were removed, counted and observed for mobility or mortality.

 

There were no mortalities or symptoms of toxicity in either the control or the 10 or 100mg/L test systems after 21 days. The total numbers of offspring for the control, 10 and 100mg/L were 831, 812 and 889 respectively. No dead offspring were observed.

 

The lengths of the surviving P0Daphniawere recorded at the end of the test period. The mean lengths for the control, 10 and 100 mg/L test systems were 4.4, 4.5 and 4.4mm respectively.

 

The results did not show any effect due to the test substance when compared to the control sample. As the initial range finding study showed conclusively there was no effect on theDaphnia magnaat the highest tested concentration, a full study was considered unnecessary.