Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Endpoint:
short-term toxicity to aquatic invertebrates
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP study according EU/OECD guideline

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2004

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
EU Method C.2 (Acute Toxicity for Daphnia)
Qualifier:
according to guideline
Guideline:
OECD Guideline 202 (Daphnia sp. Acute Immobilisation Test)
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
2,2-dimethylbutyric acid
EC Number:
209-865-0
EC Name:
2,2-dimethylbutyric acid
Cas Number:
595-37-9
Molecular formula:
C6H12O2
IUPAC Name:
2,2-dimethylbutanoic acid
Constituent 2
Reference substance name:
2,2-dimethyl butanoic acid
IUPAC Name:
2,2-dimethyl butanoic acid

Sampling and analysis

Analytical monitoring:
yes

Test solutions

Vehicle:
no

Test organisms

Test organisms (species):
Daphnia magna

Study design

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

Results and discussion

Effect concentrationsopen allclose all
Duration:
24 h
Dose descriptor:
EC0
Effect conc.:
>= 100 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.
Duration:
48 h
Dose descriptor:
EC0
Effect conc.:
>= 100 mg/L
Nominal / measured:
nominal
Conc. based on:
test mat.

Any other information on results incl. tables

Highest test concentration resulting in 0% immobilisation (EC0 48h): >= 100 mg/1

The results are expressed in terms of nominal concentrations (at 24h and 48h). Recovery rates correspond to 87.4% of nominal values at 0 hours, and to 89.6% of nominal values at 48 hours, respectively.

The hardness of the dilution water used was 15.1 °dH (= 269.54 mg/1 CaCO3).

Applicant's summary and conclusion

Validity criteria fulfilled:
yes