Alcohols, C12-14-secondary, .beta.-(2-hydroxyethoxy)

Toxicity to aquatic algae and cyanobacteria

Administrative data

Endpoint:

toxicity to aquatic algae and cyanobacteria

Type of information:

migrated information: read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: GLP guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1996

Report date:

1996

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method C.3 (Algal Inhibition test)

GLP compliance:

yes

Test material

Test material information

Constituent 1

Reference substance name:

Alcohols, C12-14, ethoxylated

EC Number:

500-213-3

EC Name:

Alcohols, C12-14, ethoxylated

Cas Number:

68439-50-9

IUPAC Name:

68439-50-9

Sampling and analysis

Analytical monitoring:

yes

Test solutions

Vehicle:

no

Test organisms

Test organisms (species):

Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)

Details on test organisms:

- Strain: Scenedesmus subspicatus SAG 8681

Study design

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

72 h

Test conditions

Test temperature:

23 °C

pH:

test start: 7.6 - 7.9
test end: 8.9 - 9.3

Nominal and measured concentrations:

- Concentrations tested (nominal): 0, 0.05, 0.1, 0.2, 0.4 and 0.8 mg/L
- Recovery: 70.9% (mean value) for the analysed test concentration 0.8 mg/L

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

72 h

Dose descriptor:

EC50

Effect conc.:

0.57 mg/L

Nominal / measured:

meas. (arithm. mean)

Conc. based on:

test mat.

Basis for effect:

growth rate

Effect concentrations 2

Duration:

72 h

Dose descriptor:

other: ErC10

Effect conc.:

0.13 mg/L

Nominal / measured:

meas. (geom. mean)

Conc. based on:

act. ingr.

Basis for effect:

growth rate

Details on results:

72 h EC50 0.13 mg/L (meassured; biomass)