Acrylaldehyde

Sediment toxicity

Administrative data

Endpoint:

sediment toxicity: short-term

Type of information:

experimental study

Adequacy of study:

disregarded due to major methodological deficiencies

Reliability:

3 (not reliable)

Rationale for reliability incl. deficiencies:

other: Documentation insufficient for assessment

Data source

Reference

Reference Type:

publication

Title:

RISK ASSESSMENT OF MAGNACIDE® H HERBICIDE AT Rio COLORADO IRRIGATION CHANNELS (ARGENTINA), TIER 3: STUDIES ON NATIVE SPECIES

Author:

Venturino A, Montagna MC, Pechen de Angelo AM

Year:

2007

Bibliographic source:

Environmental Toxicology and Chemistry, Vol. 26, No. 1, pp. 177-182

Materials and methods

Principles of method if other than guideline:

acute toxicity testing

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Magnacide H

IUPAC Name:

Magnacide H

Details on test material:

Magnacide H was provided by Baker Petrolite. The active ingredient in Magnacide H is 96.08 g/L acrolein (CAS no. 107-02-8)

Sampling and analysis

Analytical monitoring:

yes

Test organisms

Test organisms (species):

Chironomus sp.

Details on test organisms:

TEST ORGANISM
- Source: wild caught, collected at CORFO-Rio Colorado irrigation channels (Argentina)
- Age at study initiation: last instar larvae

QUARANTINE (wild caught)
no data

Study design

Study type:

laboratory study

Test type:

static

Water media type:

freshwater

Type of sediment:

not specified

Exposure duration

Duration:

24 h

Exposure phase:

total exposure duration

Test conditions

Test temperature:

20-22°C

Nominal and measured concentrations:

not reported

Details on test conditions:

TEST SYSTEM
- Test vessel:
- fill volume: 200 mL
- Aeration: constant
- Sediment volume: probably no sediment was used in the test systems (not reported)
- No. of organisms per vessel: 20
- No. of vessels per concentration (replicates): 3
- No. of vessels per control (replicates): 3

TEST MEDIUM / WATER PARAMETERS
- Source/preparation of dilution water: CharcoaI-filtered and dechlorinated tap water

OTHER TEST CONDITIONS
- Photoperiod: 16h light : 8h dark

EFFECT PARAMETERS MEASURED:
Mortality

Results and discussion

Effect concentrations

Effect concentrations 1

Duration:

24 h

Dose descriptor:

LC50

Effect conc.:

2.83 mg/L

Nominal / measured:

meas. (initial)

Conc. based on:

act. ingr.

Basis for effect:

mortality

Remarks on result:

other: 95% CL: 2.67-2.99 mg/L

Effect concentrations 2

Duration:

24 h

Dose descriptor:

other: LC95

Effect conc.:

4.19 mg/L

Nominal / measured:

meas. (initial)

Conc. based on:

act. ingr.

Basis for effect:

mortality

Remarks on result:

other: 95% CL: 3.85-4.75 mg/L

Details on results:

24h-NOEC = 1.0 mg/L
24h-LOEC = 1.62 mg/L
NOEC and LOEC values assessed experimentally, statistically different from control

Reported statistics and error estimates:

Mortality data based on the actual initial concentrations were subjected to probit analysis using a BASIC program to determine the LC50 and LC95. No-observed lethal concentration (NOEC) and lowest-observed lethal concentration (LOEC) were experimentally assessed from data and statisticaI comparison of the observed mortality versus control mortality.

Applicant's summary and conclusion

Conclusions:

Reliability not assassable due to lacks in documentation (e.g. sediment used?)