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EC number: 247-368-0 | CAS number: 25956-17-6
pH
Administrative data
- Endpoint:
- pH
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Justification for type of information:
- Data is from experimental study
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 018
- Report date:
- 2018
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 122 (Determination of pH, Acidity and Alkalinity)
- GLP compliance:
- no
Test material
- Reference substance name:
- Disodium 6-hydroxy-5-[(2-methoxy-4-sulphonato-m-tolyl)azo]naphthalene-2-sulphonate
- EC Number:
- 247-368-0
- EC Name:
- Disodium 6-hydroxy-5-[(2-methoxy-4-sulphonato-m-tolyl)azo]naphthalene-2-sulphonate
- Cas Number:
- 25956-17-6
- Molecular formula:
- C18H16N2O8S2.2Na
- IUPAC Name:
- disodium 6-hydroxy-5-[(2-methoxy-3-methyl-4-sulfonatophenyl)diazenyl]naphthalene-2-sulfonate
- Test material form:
- solid: particulate/powder
- Details on test material:
- - Name of test material: 2-Naphthalenesulfonic acid, 6-hydroxy-5-[2-(2-methoxy-5-methyl-4-sulfophenyl)diazenyl]-, sodium salt (1:2);
- Molecular formula: C18-H16-N2-O8-S2.2Na
- Molecular weight: 496.4266 g/mole
- Smiles : c12c(cc(cc2)S(=O)(=O)[O-])ccc(c1/N=N/c1c (cc(c(c1)C)S (=O)(=O)[O-])OC)O.[Na+].[Na+]
- Inchl: 1S/C18H16N2O8S2.2Na/c1-10-7-14(16(28-2)9-17(10)30(25,26)27)19-20-18-13-5-4-12(29(22,23)24)8-11(13)3-6-15(18)21;;/h3-9,21H,1-2H3,(H,22,23,24) (H,25,26,27);;/q;2*+1/p-2/b20-19+;;
- Substance type: Organic
- Physical state: Solid
Constituent 1
Results and discussion
pH value
- Key result
- pH value:
- 8.06
- Temp.:
- 27 °C
- Concentration:
- 1 vol%
Any other information on results incl. tables
Method Details |
Observations | |
Guideline |
OECD 122 |
|
Method |
Digital pH meter |
|
Principle of Method |
The mean pH of an aqueous solution or dispersion in water was determined with a pH measurement interface equipped with an appropriate electrode system. |
|
| Temperature of 1% w/v test solution | 27°C | |
mean pH (RESULT) |
|
8.06 |
Inference |
1. Acidic 2. Basic 3. Neutral |
Basic |
Applicant's summary and conclusion
- Conclusions:
- The pH determination of test chemical was done as per the test guideline OECD 122. The mean pH of the test solution was determined with the help of digital pH meter. The mean pH was determined to be 8.06 at 27 °C.
- Executive summary:
The pH determination of test chemical was done as per the test guideline OECD 122. The mean pH of the test solution was determined with the help of digital pH meter. The mean pH was determined to be 8.06 at 27 °C. Hence the test chemical was observed to be basic in nature.
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