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Sediment toxicity

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Reference
Endpoint:
sediment toxicity: short-term
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to
Guideline:
other: PARCOM protocol (PARCOM 1995)
Deviations:
no
GLP compliance:
yes
Analytical monitoring:
no
Test organisms (species):
Corophium volutator
Study type:
laboratory study
Test type:
static
Water media type:
saltwater
Remarks:
artificial seawater
Type of sediment:
natural sediment
Remarks:
from same site as the amphipods
Limit test:
no
Duration:
10 d
Exposure phase:
total exposure duration
Nominal and measured concentrations:
Nominal concentrations of 10.0, 17.8, 31.6, 56.2, 100.0, 177.8 mg/kg sediment/dw
Duration:
10 d
Dose descriptor:
LC50
Effect conc.:
102.8 mg/kg sediment dw
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
emergence rate
Duration:
10 d
Dose descriptor:
NOEC
Effect conc.:
10 mg/kg sediment dw
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
emergence rate
Conclusions:
Exposure of Corophium volutator to the substance gave LC50 (10 d) 102.8 mg/kg sediment/dw and the NOEC value was reported as 10.0 mg/kg sediment/dw.
Executive summary:

A sample of ACP 70 was assessed for its potential toxicity to the sediment re-worker amphipod Corophium volutator. The test was carried out based on the method detailed in the PARCOM protocol (PARCOM 1995). Test organisms were introduced to sediment containing ACP 70 over the nominal concentration range of 10.0 to 177.8 mg kg/L dry weight of sediment and exposed for a period of ten days in a static test. Amphipods at all concentrations tested, reached the sediment surface within 30 minutes of addition to the test vessels. The LC50 (10 d) value was reported as 102.8 mg/kg sediment/dw and the NOEC value was reported as 10.0 mg/kg sediment/dw.

Description of key information

Results are available for one species of marine sediment organism (Corophium volutator).

Key value for chemical safety assessment

EC50 or LC50 for marine water sediment:
102.8 mg/kg sediment dw
EC10, LC10 or NOEC for marine water sediment:
10 mg/kg sediment dw

Additional information