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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
February 2018
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment

Data source

Referenceopen allclose all

Reference Type:
other company data
Title:
Unnamed
Year:
2015
Report date:
2015
Reference Type:
other company data
Title:
Unnamed
Year:
2018
Report date:
2018

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
pH determination using 10 g in 60 mL (10:6 iso:water) (test method ST-31.36)

Test material

Constituent 1
Chemical structure
Reference substance name:
Tris(2-hydroxyethyl)methylammonium hydroxide
EC Number:
251-624-7
EC Name:
Tris(2-hydroxyethyl)methylammonium hydroxide
Cas Number:
33667-48-0
Molecular formula:
C7H18NO3.HO
IUPAC Name:
2-hydroxy-N,N-bis(2-hydroxyethyl)-N-methylethanaminium hydroxide
Constituent 2
Chemical structure
Reference substance name:
2-hydroxy-N-(2-(2-hydroxyethoxy)ethyl)-N-(2-hydroxyethyl)-N-methylethan-1-amininium hydroxide
Molecular formula:
C9H22NO4.HO
IUPAC Name:
2-hydroxy-N-(2-(2-hydroxyethoxy)ethyl)-N-(2-hydroxyethyl)-N-methylethan-1-amininium hydroxide
impurity 1
Chemical structure
Reference substance name:
2,2'-methyliminodiethanol
EC Number:
203-312-7
EC Name:
2,2'-methyliminodiethanol
Cas Number:
105-59-9
Molecular formula:
C5H13NO2
IUPAC Name:
2,2'-(methylimino)diethanol
impurity 2
Chemical structure
Reference substance name:
Water
EC Number:
231-791-2
EC Name:
Water
Cas Number:
7732-18-5
Molecular formula:
H2O
IUPAC Name:
Dihydrogenoxide
Test material form:
liquid
Remarks:
brown viscous liquid
Specific details on test material used for the study:
- Material No: 248173
- Inspection Lot: 890001159066
- Batch: 8C102
- Batch number: TD98C02E
- Water: 36.08540 wt%
- THEMAH: 48.170 wt%
- MDEA Assay: 12.910 wt%

Reagents

Reagent:
other: iso:water

Results and discussion

pH value
Key result
pH value:
13.9
Remarks on result:
other: 10 g/60 mL 10:6 iso:water

Applicant's summary and conclusion

Conclusions:
The pH of the test substance is determined to be 13.9.