Registration Dossier
Registration Dossier
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EC number: 236-695-4 | CAS number: 13465-41-3
pH
Administrative data
- Endpoint:
- pH
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- May 2020
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- test procedure in accordance with national standard methods
Data source
Reference
- Reference Type:
- other: Technical Report
- Title:
- Unnamed
- Year:
- 2 020
- Report date:
- 2020
Materials and methods
Test guideline
- Qualifier:
- according to guideline
- Guideline:
- other: DIN EN ISO 10523:2012-04
- GLP compliance:
- no
- Other quality assurance:
- ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Test material
- Reference substance name:
- Permanganic acid
- EC Number:
- 236-695-4
- EC Name:
- Permanganic acid
- Cas Number:
- 13465-41-3
- Molecular formula:
- HMnO4
- IUPAC Name:
- manganesoylol
- Reference substance name:
- Impurtiy permanganic acid
- Molecular formula:
- not available
- IUPAC Name:
- Impurtiy permanganic acid
- Test material form:
- liquid
- Details on test material:
- The permanganic acid is only stable in aqueous solution (3-5%) and the solution is placed on the market. Due to the production process only traces of K, P and S ions are to be expected as impurities.
Constituent 1
impurity 1
- Specific details on test material used for the study:
- Due to the instability of the isolated permanganic acid, the study was conducted with an aqueous solution of permanganic acid (3.49 %). The permanganic acid is also manufactured and used in this concentration.
Results and discussion
pH value
- Key result
- pH value:
- 2
- Temp.:
- 25 °C
- Concentration:
- > 3 - < 5 other: wt. - %
Applicant's summary and conclusion
- Conclusions:
- The pH value of permanganic acid in an aqueous solution is 2.
Due to the strength of permanganic acid (pKs = -2.25) and the instability of isolated permanganic acid the pH value of the undiluted sample can only be calculated. The pH value of pure permanganic acid (calculated) is 1.
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