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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable 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-measurements (10 g/l) taken in the laboratory for solutions of pure, crystalline ATMP with increasing stoichiometric amounts of the corresponding base (NaOH).
GLP compliance:
not specified

Test material

Constituent 1
Chemical structure
Reference substance name:
Nitrilotrimethylenetris(phosphonic acid)
EC Number:
229-146-5
EC Name:
Nitrilotrimethylenetris(phosphonic acid)
Cas Number:
6419-19-8
Molecular formula:
C3H12NO9P3
IUPAC Name:
nitrilotrimethylenetris(phosphonic acid)
Test material form:
solid: crystalline

Results and discussion

pH valueopen allclose all
pH value:
2
Concentration:
10 g/L
Remarks on result:
other: Stoichiometric loading of base equivalent to ATMP-1Na
pH value:
4.2
Concentration:
10 g/L
Remarks on result:
other: Stoichiometric loading of base equivalent to ATMP-2Na
pH value:
5.4
Concentration:
10 g/L
Remarks on result:
other: Stoichiometric loading of base equivalent to ATMP-3Na
pH value:
6.8
Concentration:
10 g/L
Remarks on result:
other: Stoichiometric loading of base equivalent to ATMP-4Na
pH value:
10.9
Concentration:
10 g/L
Remarks on result:
other: Stoichiometric loading of base equivalent to ATMP-5Na
pH value:
12
Concentration:
10 g/L
Remarks on result:
other: Stoichiometric loading of base equivalent to ATMP-6Na

Applicant's summary and conclusion

Conclusions:
The pH of ATMP-H has been determined using an acceptable scientific method. The result is considered reliable.