Propionaldehyde

Toxicity to aquatic algae and cyanobacteria

Administrative data

Endpoint:

toxicity to aquatic algae and cyanobacteria

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Test procedure in accordance with German national standards

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1989

Report date:

1989

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

other: DIN 38412 Teil 9

Principles of method if other than guideline:

Scenedesmus-growth inhibition test

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Propionaldehyde

EC Number:

204-623-0

EC Name:

Propionaldehyde

Cas Number:

123-38-6

Molecular formula:

C3H6O

IUPAC Name:

propanal

Sampling and analysis

Analytical monitoring:

no

Test solutions

Vehicle:

no

Details on test solutions:

Stock solution preparation: a 10 g/L stock solution was prepared in a graduated cylinder using sterile aqua bidest. No additives or solvents were used.

Test organisms

Test organisms (species):

Desmodesmus subspicatus (previous name: Scenedesmus subspicatus)

Details on test organisms:

Species/strain and source: Scenedesmus subspicatus, breeded at the testing facility

Study design

Test type:

static

Water media type:

freshwater

Limit test:

no

Total exposure duration:

72 h

Test conditions

Test temperature:

20 +/- 1°C

Nominal and measured concentrations:

Nominal concentrations in mg/L: 2, 16, 32, 64, 128, 256, 512

Details on test conditions:

- Growth/test medium chemistry: pH 8.2 +/- 1
- Exposure vessel type: test tubes
- Light levels and quality during exposure: permanent light (10 000 lux, white light, 0.72E20 photones/sec, 120 uE)
- Four replicates per treatment and eight in the control
- Test tubes were shaked twice a day to keep algae in suspension
- Statistical methods: assessment was done by graphical analysis

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

72 h

Dose descriptor:

EC0

Effect conc.:

16 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

growth rate

Effect concentrations 2

Duration:

72 h

Dose descriptor:

EC10

Effect conc.:

85 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

growth rate

Effect concentrations 3

Duration:

72 h

Dose descriptor:

EC50

Effect conc.:

260 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

growth rate

Effect concentrations 4

Duration:

72 h

Dose descriptor:

EC90

Effect conc.:

700 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

growth rate

Any other information on results incl. tables

Was control response satisfactory: yes