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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Study period:
Reported on the 23Jan1995
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1995
Report date:
1995

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: 92/69/EEC C.2 Acute toxicity for daphnia
Deviations:
not specified
GLP compliance:
not specified
Remarks:
Only a study summary is available, so this information is unavailable.

Test material

Constituent 1
Chemical structure
Reference substance name:
2-[[4-(dimethylamino)phenyl]azo]-1,3-dimethyl-1H-imidazolium chloride
EC Number:
278-601-4
EC Name:
2-[[4-(dimethylamino)phenyl]azo]-1,3-dimethyl-1H-imidazolium chloride
Cas Number:
77061-58-6
Molecular formula:
C13H18N5.Cl
IUPAC Name:
2-[[4-(dimethylamino)phenyl]azo]-1,3-dimethyl-1H-imidazolium chloride
Test material form:
solid: particulate/powder
Specific details on test material used for the study:
Identification Code: FAT 31'063/C
Generic/Trade name: FAT 31'063/C
Batch No.: 4/94
Appearance: red solid
Purity: ca. 90 % a.i.
Solubility (in water): 40 g/1
Stability:09/98

Sampling and analysis

Analytical monitoring:
yes
Details on sampling:
The test substance was homogeneously distributed in the test vessels at all test times and
test concentrations.
The measured test substance concentrations were 88 -104 % and 72 -117 % of the
nominal concentrations at the start and at the end of exposure, respectively

Therefore values were calculated based on actual mean concentrations.
The actual mean concentrations are 0.047, 0.087,0.17, 0.32, 0.63 and 1.11 mg/l.

Test solutions

Vehicle:
not specified

Test organisms

Test organisms (species):
Daphnia magna
Details on test organisms:
Daphnia Magna
Strain: Straus 1820

Study design

Test type:
static
Water media type:
not specified
Remarks:
Noted in report as "reconstituted water"
Limit test:
yes
Total exposure duration:
48 h

Test conditions

Reference substance (positive control):
not required

Results and discussion

Effect concentrationsopen allclose all
Key result
Duration:
48 h
Dose descriptor:
EC50
Remarks:
95% confidence interval
Effect conc.:
>= 0.37 - <= 0.54 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
mobility
Remarks on result:
other: Calculated Value
Key result
Duration:
24 h
Dose descriptor:
EC50
Remarks:
95% confidence interval
Effect conc.:
>= 0.55 - <= 1.08 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
mobility
Remarks on result:
other: Calculated Value
Key result
Duration:
48 h
Dose descriptor:
NOEC
Effect conc.:
ca. 0.17 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
mobility
Remarks on result:
other: Observed Result
Key result
Duration:
48 h
Dose descriptor:
EC0
Effect conc.:
ca. 0.17 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
mobility
Remarks on result:
other: Observed Result
Key result
Duration:
48 h
Dose descriptor:
EC100
Effect conc.:
ca. 1.11 mg/L
Nominal / measured:
meas. (not specified)
Conc. based on:
test mat.
Basis for effect:
mobility
Remarks on result:
other: Observed Result

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
The EC50 (48h) for Daphnic Magna is 0.44 mg/l. with a 95% CI from 0.37-0.54mg/L. According to EC 1272/2008, Basic Red 51 should be classified as an Acute Aquatic Hazard Category 1 with the Hazard statement H400.
Executive summary:

The EC50 (48h) for Daphnic Magna is 0.44 mg/l. with a 95% CI from 0.37-0.54mg/L. According to EC 1272/2008, Basic Red 51 should be classified as an Acute Aquatic Hazard Category 1 with the Hazard statement H400.