Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 201-635-8 | CAS number: 85-83-6
Acute Toxicity: oral
Administrative data
- Endpoint:
- acute toxicity: oral
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- data from handbook or collection of data
- Justification for type of information:
- Data is from handbook.
Data source
Reference
- Reference Type:
- review article or handbook
- Title:
- Acute oral toxicity study of test chemical - LD50
- Author:
- Gisbert Otterstätter
- Year:
- 1 999
- Bibliographic source:
- Coloring of Food, Drugs, and Cosmetics
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: As mentioned below
- Principles of method if other than guideline:
- Acute oral toxicity study of the given test chemical in Rat.
- GLP compliance:
- not specified
- Test type:
- other: not specified
- Limit test:
- no
Test material
- Reference substance name:
- 1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol
- EC Number:
- 201-635-8
- EC Name:
- 1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol
- Cas Number:
- 85-83-6
- Molecular formula:
- C24H20N4O
- IUPAC Name:
- 1-(2-methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol
- Test material form:
- solid
- Details on test material:
- - IUPAC Name: 1-(2-Methyl-4-(2-methylphenylazo)phenylazo)-2-naphthol
- Common Name: Scarlet red
- InChI: 1S/C24H20N4O/c1-16-7-3-6-10-21(16)26-25-19-12-13-22(17(2)15-19)27-28-24-20-9-5-4-8-18(20)11-14-23(24)29/h3-15,29H,1-2H3/b26-25+,28-27+
- Smiles: c12c(\N=N\c3c(cc(\N=N\c4c(cccc4)C)cc3)C)c(ccc1cccc2)O
- Molecular formula :C24H20N4O
- Molecular weight :380.449 g/mol
- Substance type:Organic
- Physical state:solid
Constituent 1
Test animals
- Species:
- rat
- Strain:
- not specified
- Sex:
- not specified
- Details on test animals or test system and environmental conditions:
- not specified
Administration / exposure
- Route of administration:
- oral: unspecified
- Vehicle:
- not specified
- Details on oral exposure:
- not specified
- Doses:
- 3600 mg/kg bw
- No. of animals per sex per dose:
- not specified
- Control animals:
- not specified
- Details on study design:
- not specified
- Statistics:
- not specified
Results and discussion
- Preliminary study:
- not specified
Effect levels
- Sex:
- not specified
- Dose descriptor:
- LD50
- Effect level:
- ca. 3 600 mg/kg bw
- Based on:
- test mat.
- Remarks on result:
- other: 50% mortality was observed
- Mortality:
- 50% mortality was observed at 3600 mg/kg bw.
- Clinical signs:
- other: not specified
- Gross pathology:
- not specified
- Other findings:
- not specified
Applicant's summary and conclusion
- Interpretation of results:
- other: Not classified
- Conclusions:
- The acute oral LD50 value was considered to be 3600 mg/kg bw, when rats were treated with the given test chemical via oral route.
- Executive summary:
Acute oral toxicity study of test chemical was conducted in rats at the concentration of 3600 mg/kg. 50% mortality was observed at 3600 mg/kg bw. Therefore, LD50 value was considered to be 3600 mg/kg bw, when rats were treated with test chemical via oral route.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
