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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Endpoint:
toxicity to aquatic algae and cyanobacteria
Type of information:
experimental study
Adequacy of study:
other information
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Guideline study with acceptable restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1988
Report Date:
1988

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
other: German industrial standard test guideline DIN 38412 part L9
GLP compliance:
no

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): Diethylentriamin

Sampling and analysis

Analytical monitoring:
no

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)

Study design

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

Test conditions

Test temperature:
21.9 °C
pH:
at start: 10.06 - 10.98
at termination: 8.51 - 9.06
Nominal and measured concentrations:
Nominal test concentrations (mg/l): control, 100, 200, 500, 1000

Results and discussion

Effect concentrationsopen allclose all
Duration:
96 h
Dose descriptor:
EC0
Effect conc.:
200.7 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Duration:
96 h
Dose descriptor:
EC10
Effect conc.:
416.9 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Duration:
96 h
Dose descriptor:
EC50
Effect conc.:
668.3 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
growth rate
Duration:
96 h
Dose descriptor:
EC10
Effect conc.:
206 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
biomass
Duration:
96 h
Dose descriptor:
EC50
Effect conc.:
591.9 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
biomass

Any other information on results incl. tables

cell number

Nominal conc.(mg/l)

cell number (x 10E3) after

0 h

24 h

48 h

72 h

96 h

0

12

26

58

107

255

100

11

24

54

105

252

200

10

23

48

101

231

500

12

19

36

80

174

1000

12

10

5

5

7

pH values

Nominal conc.(mg/l)

pH values

test start

test end

0

7.81

7.82

100

10.06

8.51

200

10.32

8.73

500

10.69

8.92

1000

10.98

9.06

Applicant's summary and conclusion