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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Administrative data

Endpoint:
pH
Type of information:
other: from handbooks
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data

Data source

Referenceopen allclose all

Reference Type:
review article or handbook
Title:
Determination of pH
Author:
Maryadele J ‘O Neil
Year:
2006
Bibliographic source:
The Merck index, 14th Edition, 2006
Reference Type:
review article or handbook
Title:
Determination of pH
Author:
Pradyot Patnaik, Ph.D.
Year:
2003
Bibliographic source:
Handbook of Inorganic Chemicals,2003

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: as mentioned below
Principles of method if other than guideline:
Data from Handbooks.
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Potassium hydrogen phthalate
EC Number:
212-889-4
EC Name:
Potassium hydrogen phthalate
Cas Number:
877-24-7
Molecular formula:
C8H6O4.K
IUPAC Name:
phthalic acid
Test material form:
solid
Details on test material:
Name of test material (as cited in study report): Potassium hydrogen phthalate
- Molecular formula: C8H5O4.K
- Molecular weight: 204.23 g/mole
InChI: 1S/C8H6O4.K/c9-7(10)5-3-1-2-4-6(5)8(11)12;/h1-4H,(H,9,10)(H,11,12);/q;+1/p-1
Smiles: c1(c(cccc1)C(=O)[O-])C(O)=O.[K+]
Substance Type: Organic
Physical State: Solid
Specific details on test material used for the study:
- Name of test material: hydrogen potassium phthalate
- Molecular formula: C8 H6 O4.K
- Molecular weight: 204.221 g/mol
- Smiles notation: c1(c(cccc1)C(=O)[O-])C(O)=O.[K+]
- InChl: 1S/C8H6O4.K/c9-7(10)5-3-1-2-4-6(5)8(11)12;/h1-4H,(H,9,10)(H,11,12);/q;+1/p-1- Substance type: Organic
- Physical state: Solid

Results and discussion

pH value
pH value:
4.005
Temp.:
25 °C
Concentration:
0.05 other: molar aqeous solution

Applicant's summary and conclusion

Conclusions:
From the available data from handbook, the pH of 1,2-Benzenedicarboxylic acid, monopotassium salt(877-24-7) was determined to be 4.005 This value indicate that the 1,2-Benzenedicarboxylic acid, monopotassium salt(877-24-7) is acidic in nature.
Executive summary:

From the available data from handbook, the pH of 1,2-Benzenedicarboxylic acid, monopotassium salt(877-24-7) was determined to be 4.005 This value indicate that the 1,2-Benzenedicarboxylic acid, monopotassium salt(877-24-7) is acidic in nature.