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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
experimental study
Adequacy of study:
key study
Study period:
2017-01-18 – 2017-01-18
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Data is from experimental study report.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report date:
2017

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: as mentioned below
Principles of method if other than guideline:
The mean pH of an aqueous solution or dispersion in water is determined with a pH measurement interface equipped with an appropriate electrode system.
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
4-methoxyphenylacetic acid
EC Number:
203-166-4
EC Name:
4-methoxyphenylacetic acid
Cas Number:
104-01-8
Molecular formula:
C9H10O3
IUPAC Name:
2-(4-methoxyphenyl)acetic acid
Test material form:
solid
Specific details on test material used for the study:
- Name of test material: 4-methoxyphenylacetic acid
- Molecular formula: C9 H10 O3
- Molecular weight: 166.175 g/mol
- Smiles notation: c1(ccc(OC)cc1)CC(O)=O
- InChl: 1S/C9H10O3/c1-12-8-4-2-7(3-5-8)6-9(10)11/h2-5H,6H2,1H3,(H,10,11)
- Substance type: Organic
- Physical state: solid

Results and discussion

pH value
pH value:
2.83
Temp.:
27 °C
Concentration:
1 other: %w/v
Acidity or alkalinity
Acidity or alkalinity:
acidity
Value:
2.83

Applicant's summary and conclusion

Conclusions:
The pH of 1% w/v dispersion of the test item 4-methoxyphenylacetic acid (CAS No104-01-8) was 2.83 at 27 °C.
Executive summary:

The pH determination of test item 4-methoxyphenylacetic acid (CAS No 104-01-8) was done following OECD guideline122. pH of 1% w/v dispersion was measured with the help of pH meter and it was observed to be 2.83 at 27 °C.Based on the result, 4-methoxyphenylacetic acid (CAS No 104-01-8) was considered to be acidic in nature.