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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
2017-01-17 – 2017-01-17
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study

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: 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

Constituent 1
Chemical structure
Reference substance name:
Tetrabutylammonium hydrogen sulphate
EC Number:
251-068-5
EC Name:
Tetrabutylammonium hydrogen sulphate
Cas Number:
32503-27-8
Molecular formula:
C16H36N.HO4S
IUPAC Name:
tetrabutylammonium hydrogen sulphate
Test material form:
solid: crystalline
Details on test material:
- Name of test material (as cited in study report): Tetrabutylammonium hydrogen sulphate
- Molecular formula :C16H36N.HO4S
- Molecular weight : 339.53g/mol
- Smiles notation: C([N+](CCCC)(CCCC)CCCC)CCC.S([O-])(=O)(=O)O
- InChl : 1S/C16H36N.H2O4S/c1-5-9-13-17(14-10-6-2,15-11-7-3)16-12-8-4;1-5(2,3)4/h5-16H2,1-4H3;(H2,1,2,3,4)/q+1;/p-1
- Substance type: Organic
- Physical state: Solid
Specific details on test material used for the study:
- Name of test material: N,N,N-tributylbutan-1-aminium hydrogen sulfate
- Molecular formula: C16 H36 N.H O4 S
- Molecular weight: 339.537 g/mol
- Smiles notation: C([N+](CCCC)(CCCC)CCCC)CCC.S([O-])(=O)(=O)O
- InChl: 1S/C16H36N.H2O4S/c1-5-9-13-17(14-10-6-2,15-11-7-3)16-12-8-4;1-5(2,3)4/h5-16H2,1-4H3;(H2,1,2,3,4)/q+1;/p-1
- Substance type: Organic
- Physical state: Solid

Results and discussion

pH value
pH value:
1.73
Temp.:
26 °C
Concentration:
1 other: % w/v

Applicant's summary and conclusion

Conclusions:
pH of 1% w/v aqueous solution of the Tetrabutylammonium hydrogen sulphate (CAS No 32503-27-8) is 1.73 at 26 °C.
Executive summary:

pH of 1% w/v aqueous solution of the test substance Tetrabutylammonium hydrogen sulphate (CAS No32503 -27 -8) is 1.73 at 26 °C. Thus, 1% solution can be considered to be acidic in nature.