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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study meets generally accepted scientific principles, acceptable for assessment as supporting data

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 (10g/l) taken in the laboratory for solutions of pure, crystalline ATMP with increasing stoichometric amounts of the corresponding base (NaOH).
GLP compliance:
not specified

Test material

Constituent 1
Reference substance name:
[nitrilotris(methylene)]trisphosphonic acid, sodium salt
EC Number:
243-900-0
EC Name:
[nitrilotris(methylene)]trisphosphonic acid, sodium salt
Cas Number:
20592-85-2
IUPAC Name:
sodium hydrogen {[bis(phosphonomethyl)amino]methyl}phosphonate

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:
Company data are available for pH of stoichiometric solutions of salts. Of particular interest is the finding that a solution equivalent to ATMP-2Na has a pH of 4.2.