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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

pH

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Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Non-GLP, non-guideline study, limitations in design and/or reporting but otherwise adequate for assessment.

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Principles of method if other than guideline:
pH-metry
potentiometry for acid reserve

Test material

Constituent 1
Chemical structure
Reference substance name:
Trifluoroacetic acid
EC Number:
200-929-3
EC Name:
Trifluoroacetic acid
Cas Number:
76-05-1
Molecular formula:
C2HF3O2
IUPAC Name:
trifluoroacetic acid
Test material form:
liquid
Details on test material:
- Name of test material (as cited in study report): TFA
- Lot/batch No.: SFA1006230

Results and discussion

pH value
pH value:
0.45
Concentration:
10 other: %m/m
Remarks on result:
other: aqueous solution

Any other information on results incl. tables

Acid reserve = 35.0 g NaOH / 100 g sample

Applicant's summary and conclusion

Conclusions:
TFA is of high acidity.
The information is relevant for corrosivity assessment and waiving of acute toxicity tests on animals.
Executive summary:

The acidity of Trifluoroacetic acid (TFA) was estimated by pH and acid reserve measurements. No experimental data were provided. Results are respectively 0.45 for a 10% aqueous solution, and 35g NaOH/100g.