Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 222-657-4 | CAS number: 3567-69-9
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: OECD 122
- Principles of method if other than guideline:
- A pH meter is essentially a voltmeter with high input impedance which measures the voltage of an electrode sensitive to the hydrogen ion concentration, relative to another electrode which exhibits a constant voltage
- GLP compliance:
- no
Test material
- Reference substance name:
- Disodium 4-hydroxy-3-[(4-sulphonatonaphthyl)azo]naphthalenesulphonate
- EC Number:
- 222-657-4
- EC Name:
- Disodium 4-hydroxy-3-[(4-sulphonatonaphthyl)azo]naphthalenesulphonate
- Cas Number:
- 3567-69-9
- Molecular formula:
- C20H12N2Na2O7S2
- IUPAC Name:
- disodium 4-hydroxy-3-[(4-sulfonato-1-naphthyl)diazenyl]naphthalene-1-sulfonate
- Test material form:
- other: clear pale yellow liquid
- Details on test material:
- - Name of test material (as cited in study report): Disodium 4-hydroxy-3-[(4-sulphonatonaphthyl)azo]naphthalene sulphonate
- Molecular formula (if other than submission substance): C20H14N2O7S2.2Na
- Molecular weight (if other than submission substance): 502.4338 g/mol
- Substance type: Organic
- Physical state: Solid
- Analytical purity: 98.04%
Constituent 1
Results and discussion
pH value
- pH value:
- 7.37
- Temp.:
- 32 °C
- Concentration:
- 1 vol%
- Remarks on result:
- other: Neutral
Applicant's summary and conclusion
- Conclusions:
- The mean pH of 1% w/v solution of the test item Disodium 4-hydroxy-3-[(4-sulphonatonaphthyl)azo] naphthalene sulphonate (CAS No. 3567-69-9)was 7.37 at 32 °C.
- Executive summary:
The pH determination of test item Disodium 4-hydroxy-3-[(4-sulphonatonaphthyl)azo] naphthalene sulphonate (CAS No. 3567-69-9) was done following OECD guideline 122. The mean pH of 1% w/v solution was measured with the help of pH meter and it was observed to be7.37 at 32°C .
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
