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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Administrative data

Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study with limited documentation and with no data on GLP compliance. In the OECD SIDS on 2-Naphthol (2002) a similar reliability was assigned.

Data source

Reference
Reference Type:
publication
Title:
Trans Am Fish Soc 113 (1)
Author:
Millemann RE et al
Year:
1984
Bibliographic source:
Millemann RE et al; Trans Am Fish Soc 113 (1): 74-85 (1984)

Materials and methods

Test guideline
Guideline:
other: Acute, static toxicity test
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
2-naphthol
EC Number:
205-182-7
EC Name:
2-naphthol
Cas Number:
135-19-3
Molecular formula:
C10H8O
IUPAC Name:
2-naphthol

Sampling and analysis

Analytical monitoring:
yes

Test solutions

Details on test solutions:
Covered 100-ml beakers filled with 75 ml test solution were used as test vessels. Test solution was prepared with well water.

Test organisms

Test organisms (species):
Gammarus minus
Details on test organisms:
Adult animals collected from a local stream

Study design

Test type:
static
Water media type:
freshwater
Total exposure duration:
48 h

Test conditions

Hardness:
Hardness: 140 mg/l as CaCO3
Alkalinity: 120 mg/l as CaCO3
Test temperature:
21-24 degree C
pH:
7.8
Dissolved oxygen:
No data
Salinity:
No data
Nominal and measured concentrations:
No detailed data. 5 test concentrations.
Details on test conditions:
4 replicates of five animals were used for each of the 5 test concentrations.
Reference substance (positive control):
not specified

Results and discussion

Effect concentrations
Duration:
48 h
Dose descriptor:
EC50
Effect conc.:
0.85 mg/L
Remarks on result:
other: 95 % Conf. Lim. 0.7 - 1.03 mg/l

Applicant's summary and conclusion

Conclusions:
An acute static toxicity test on Gammarus minus (Crustacea) for 48h showed a EC50 value of 0.85 mg/L.