Ethanol, 2-amino-, reaction products with ammonia, 1-piperazineethanamine fraction

Toxicity to aquatic algae and cyanobacteria

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

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 concentrations

Effect concentrations 1

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

Effect concentrations 2

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

Effect concentrations 3

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

Effect concentrations 4

Duration:

96 h

Dose descriptor:

EC10

Effect conc.:

206 mg/L

Nominal / measured:

nominal

Conc. based on:

test mat.

Basis for effect:

biomass

Effect concentrations 5

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