Registration Dossier
Registration Dossier
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EC number: 256-457-3 | CAS number: 49744-26-5
Acute Toxicity: oral
Administrative data
- Endpoint:
- acute toxicity: oral
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- Oct 1975
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 1 975
- Report date:
- 1975
Materials and methods
Test guideline
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- OECD Guideline 401 (Acute Oral Toxicity)
- GLP compliance:
- yes
- Test type:
- standard acute method
- Limit test:
- yes
Test material
- Reference substance name:
- 2-(2-methoxyethoxy)ethyl 4-[(5-cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxopyridin-3-yl)azo]benzoate
- EC Number:
- 256-457-3
- EC Name:
- 2-(2-methoxyethoxy)ethyl 4-[(5-cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxopyridin-3-yl)azo]benzoate
- Cas Number:
- 49744-26-5
- Molecular formula:
- C21H24N4O6
- IUPAC Name:
- 2-(2-methoxyethoxy)ethyl 4-[(5-cyano-1-ethyl-1,6-dihydro-2-hydroxy-4-methyl-6-oxopyridin-3-yl)azo]benzoate
- Test material form:
- solid: granular
- Details on test material:
- Disperse Yellow 126
Constituent 1
Test animals
- Species:
- rat
- Strain:
- Wistar
- Sex:
- female
- Details on test animals or test system and environmental conditions:
- TEST ANIMALS
- Source: Charles River UK Ltd.m Margate, UK
- Age at study initiation: ca. 1 month
- Fasting period before study: 16 - 20 h before dosing
- Housing: steel cages, 50 x 30 x 18 cm
- Diet (e.g. ad libitum): ad lib.
- Water (e.g. ad libitum): ad lib.
- Acclimation period: >= 7d
ENVIRONMENTAL CONDITIONS
- Temperature (°C): 19 - 23°C
- Humidity (%): 40 - 60% r.h.
- Air changes (per hr): 17
- Photoperiod (hrs dark / hrs light): 12/12
Administration / exposure
- Route of administration:
- oral: gavage
- Vehicle:
- water
- Doses:
- 5000 mg/kg bw
- No. of animals per sex per dose:
- 5
- Control animals:
- no
- Details on study design:
- - Duration of observation period following administration: 21 d
- Frequency of observations and weighing: days 1, 3, 5, 8, 15, 21
- Necropsy of survivors performed: yes
- Other examinations performed: clinical signs, body weight, gross pathology
Results and discussion
- Preliminary study:
- yes
Effect levels
- Key result
- Sex:
- female
- Dose descriptor:
- LD50
- Effect level:
- > 5 000 mg/kg bw
- Based on:
- test mat.
- Remarks on result:
- not determinable due to absence of adverse toxic effects
- Mortality:
- No mortality
- Clinical signs:
- other: No significant effect
- Gross pathology:
- No significant effect
- Other findings:
- Low systemic toxicity
Applicant's summary and conclusion
- Interpretation of results:
- GHS criteria not met
- Conclusions:
- The LD50 (acute, oral, gavage) in female rats was determined to be > 5000 mg/kg. Therefore, the substance is not classifiable according to the CLP Regulation.
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