Registration Dossier
Registration Dossier
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EC number: 205-137-1 | CAS number: 134-31-6
pH
Administrative data
- Endpoint:
- pH
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Data source
Reference
- Reference Type:
- study report
- Title:
- Unnamed
- Year:
- 2 017
- Report date:
- 2017
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- ASTM D1293 (Standard Test Methods for pH of Water)
- GLP compliance:
- no
Test material
- Reference substance name:
- Bis(8-hydroxyquinolinium) sulphate
- EC Number:
- 205-137-1
- EC Name:
- Bis(8-hydroxyquinolinium) sulphate
- Cas Number:
- 134-31-6
- Molecular formula:
- C9H7NO.1/2H2O4S
- IUPAC Name:
- bis(8-hydroxyquinolinium) sulphate
- Test material form:
- solid: particulate/powder
- Remarks:
- yellow powder
Constituent 1
Reagents
- Reagent:
- water
Results and discussion
pH value
- pH value:
- 2.7
- Temp.:
- 20 °C
- Concentration:
- 1 vol%
Any other information on results incl. tables
PROCEDURE:
200 mg of the test substance were dissolved in 20 mL of water.
pH of the 1% solution = 2,7.
25,8 % of sulphate ion correspond to 0,26875 mol.
The organic fraction (protonated hydroxyquinoline) is 100 - 25,8% = 74,2% corresponding to 0,50766mol.
The counterion of the protonated hydroxyquinoline is thus 0,25383 mol so the excess sulphate is 0,26875 - 0,25383 = 0,01492 mol corresponding to 1,46 % H2SO4 that justifies the pH of 2,7 of a 1% water solution.
Applicant's summary and conclusion
- Conclusions:
- pH of the 1% solution = 2,7
- Executive summary:
pH of the 1% solution = 2,7
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