Registration Dossier
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EC number: 203-187-9 | CAS number: 104-23-4
pH
Administrative data
- Endpoint:
- pH
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 23.03.2013 -09.04.2013
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- Experimental test result performed using standard test guidelines
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 013
- Report date:
- 2013
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: by pH meter
- Principles of method if other than guideline:
- Measured as negative log of Hydrogen Ion concentration using pH meter & appropriate Buffers of pH 4 & 9
- GLP compliance:
- no
- Other quality assurance:
- ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Test material
- Reference substance name:
- 4'-aminoazobenzene-4-sulphonic acid
- EC Number:
- 203-187-9
- EC Name:
- 4'-aminoazobenzene-4-sulphonic acid
- Cas Number:
- 104-23-4
- Molecular formula:
- C12H11N3O3S
- IUPAC Name:
- 4'-aminoazobenzene-4-sulphonic acid
- Test material form:
- solid: particulate/powder
- Details on test material:
- - InChI: 1S/C12H11N3O3S/c13-9-1-3-10(4-2-9)14-15-11-5-7-12(8-6-11)19(16,17)18/h1-8H,13H2,(H,16,17,18)/b15-14+
- Smiles: S(c1ccc(\N=N\c2ccc(N)cc2)cc1)(O)(=O)=O
- Substance type: Organic
- Physical state: solid
Constituent 1
- Specific details on test material used for the study:
- - Name of test material: 4-(4-Aminophenylazo)benzenesulphonic acid
- Molecular formula: C12H11N3O3S
- Molecular weight: 277.303 g/mol
- Smiles notation: S(c1ccc(\N=N\c2ccc(N)cc2)cc1)(O)(=O)=O
- InChl: 1S/C12H11N3O3S/c13-9-1-3-10(4-2-9)14-15-11-5-7-12(8-6-11)19(16, 17)18/h1-8H,13H2,(H,16,17,18)/b15-14+
- Substance type: organic
- Physical state: Solid
Results and discussion
pH value
- Key result
- pH value:
- 3.52
- Temp.:
- 25 °C
- Concentration:
- 1 vol%
- Remarks on result:
- other: Acidic
Applicant's summary and conclusion
- Conclusions:
- 1% by volume solution of test chemical was determined to exhibit a pH of 3.52 at 25°C. Thus 1% by volume solution of test chemical is acidic in nature.
- Executive summary:
1% by volume solution of test chemical was determined to exhibit a pH of 3.52 at 25°C. Thus 1% by volume solution of test chemical is acidic in nature.
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