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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
1978
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:
1978
Report date:
1978

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 401 (Acute Oral Toxicity)
GLP compliance:
no
Test type:
standard acute method
Limit test:
yes

Test material

Constituent 1
Chemical structure
Reference substance name:
Trisodium 4-[[4-[[(2,3-dichloro-6-quinoxalinyl)carbonyl]amino]-2-sulphonatophenyl]azo]-4,5-dihydro-5-oxo-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate
EC Number:
278-108-4
EC Name:
Trisodium 4-[[4-[[(2,3-dichloro-6-quinoxalinyl)carbonyl]amino]-2-sulphonatophenyl]azo]-4,5-dihydro-5-oxo-1-(4-sulphonatophenyl)-1H-pyrazole-3-carboxylate
Cas Number:
75199-00-7
Molecular formula:
C25H15Cl2N7O10S2.3Na
IUPAC Name:
trisodium 4-[(E)-2-[4-(2,3-dichloroquinoxaline-6-amido)-2-sulfophenyl]diazen-1-yl]-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylate
Test material form:
solid
Details on test material:
Reactive Yellow 27

Test animals

Species:
rat
Strain:
Wistar
Sex:
male
Details on test animals or test system and environmental conditions:
TEST ANIMALS
- Source: Winkelmann, Borchen, Germany
- Age at study initiation: 9 wks
- Weight at study initiation: 150 - 200 g
- Fasting period before study: 16 h
- Housing: Makrolon Type III cages (group of 5 animals)
- Diet (e.g. ad libitum): ad lib.
- Water (e.g. ad libitum): ad lib.

ENVIRONMENTAL CONDITIONS
- Temperature (°C): 20.5 - 23.5
- Humidity (%): 55 - 65
- Light/darkness (h): 12/12

Administration / exposure

Route of administration:
oral: gavage
Vehicle:
water
Doses:
5000 mg/kg bw
No. of animals per sex per dose:
10
Control animals:
no
Details on study design:
- Duration of observation period following administration: 14 days
- Frequency of observations and weighing: daily
- Necropsy of survivors performed: not reported
- Other examinations performed: clinical signs

Results and discussion

Preliminary study:
Probit analysis
Effect levels
Key result
Sex:
male
Dose descriptor:
LD50
Effect level:
> 3 200 mg/kg bw
Based on:
act. ingr.
Remarks on result:
not determinable due to absence of adverse toxic effects
Mortality:
No mortality
Clinical signs:
No clinical signs observed

Applicant's summary and conclusion

Interpretation of results:
GHS criteria not met
Conclusions:
The LD50 (oral, gavage) in male rats was determined to be >3200 mg/kg bw (act. ingr.). The substance is not classifiable according to CLP criteria.