Registration Dossier
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EC number: 220-293-0 | CAS number: 2706-28-7
pH
Administrative data
- Endpoint:
- pH
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 016
- Report date:
- 2016
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: as mentioned below
- Principles of method if other than guideline:
- The mean pH of an aqueous solution or dispersion in water is determined with a pH measurement interface equipped with an appropriate electrode
system. - GLP compliance:
- not specified
Test material
- Reference substance name:
- Disodium 2-amino-5-[(4-sulphonatophenyl)azo]benzenesulphonate
- EC Number:
- 220-293-0
- EC Name:
- Disodium 2-amino-5-[(4-sulphonatophenyl)azo]benzenesulphonate
- Cas Number:
- 2706-28-7
- Molecular formula:
- C12H11N3O6S2.2Na
- IUPAC Name:
- disodium 2-amino-5-[(4-sulfonatophenyl)diazenyl]benzenesulfonate
- Reference substance name:
- Disodium 2-amino-5-[(4- sulphonatophenyl)azo]benzenesulphonate
- IUPAC Name:
- Disodium 2-amino-5-[(4- sulphonatophenyl)azo]benzenesulphonate
- Test material form:
- other: Solid
- Details on test material:
- - Name of test material (as cited in study report): Disodium 2-amino-5-[(4-sulphonatophenyl)azo]benzenesulphonate (Synonym of C.I. Acid Yellow 9)
- Molecular formula: C12H11N3O6S2.2Na
- Molecular weight: 401.3301 g/mol
- Smiles notation: S(=O)(=O)(c1cc(/N=N/c2ccc(S(=O)(=O)[O]) cc2)ccc1N)[O].[ Na+].[Na+]
-InChl:1S/C12H11N3O6S2.2Na/c1311639(712(11)23(19,20)21)151481410(528)22(16,17)18;;/h17H,
13H2,(H,16,17,18)(H,19,20,21);;/q;2*+1/p2/b1514+;;
- Substance type: Organic
- Physical state: Solid
- Purity: 99.72%
Constituent 1
Constituent 2
Results and discussion
pH value
- pH value:
- 7.82
- Temp.:
- 28 °C
- Concentration:
- 1 other: % w/v
Applicant's summary and conclusion
- Conclusions:
- The pH of 1% w/v solution of the test item Disodium 2-amino-5-[(4- sulphonatophenyl)azo]benzenesulphonate (CAS No2706-28-7)was 7.82 at28 °C.
- Executive summary:
The pH determination of test item Disodium 2-amino-5-[(4-sulphonatophenyl)azo]benzenesulphonate (CAS No 2706-28-7) was done following OECD guideline 122. pH of 1% w/v solution was measured with the help of pH meter and it was observed to be 7.82at 28 °C.
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