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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicological information

Acute Toxicity: oral

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Administrative data

Endpoint:
acute toxicity: oral
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1972
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1973
Report date:
1973

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 401 (Acute Oral Toxicity)
GLP compliance:
yes
Test type:
acute toxic class method
Limit test:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
4-hydroxy-1-methyl-3-[(3-nitrophenyl)azo]-2-quinolone
EC Number:
229-219-1
EC Name:
4-hydroxy-1-methyl-3-[(3-nitrophenyl)azo]-2-quinolone
Cas Number:
6439-53-8
Molecular formula:
C16H12N4O4
IUPAC Name:
4-hydroxy-1-methyl-3-[(3-nitrophenyl)diazenyl]quinolin-2(1H)-one
Test material form:
solid

Test animals

Species:
rat
Strain:
Wistar
Sex:
not specified

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
CMC (carboxymethyl cellulose)
Details on oral exposure:
VEHICLE
- Concentration in vehicle: 2% and 30%
- Justification for choice of vehicle: dispersant
Control animals:
no
Details on study design:
- Duration of observation period following administration: 7 days
- Frequency of observations: daily
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, histopathology

Results and discussion

Effect levels
Key result
Sex:
not specified
Dose descriptor:
LD50
Effect level:
ca. 6 500 mg/kg bw
Based on:
test mat.
Mortality:
No mortality occured
Clinical signs:
diarrhea, urine and faeces yellowish coloured
Gross pathology:
heart dilatation, stomach dilatation, grayish-brown colorit in nephrons

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
The LD50 (oral, gavage) is ca. 6500 mg/kg bw. Therefore the GHS criteria are not met, the substance is not classifiable.