Registration Dossier

Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Measurements are performed by an experienced operator on a sample of the production of the applicant and the data are peer reviewed and judged by an experienced researcher which is an expert on the field of phosphorus chemistry.

Data source

Referenceopen allclose all

Reference Type:
study report
Title:
Unnamed
Year:
2009
Report Date:
2009
Reference Type:
other company data
Title:
Unnamed
Year:
2009
Report Date:
2009

Materials and methods

GLP compliance:
no

Results and discussion

pH value
pH value:
3.6
Concentration:
0.1 g/L
Remarks on result:
other: measured after one day at room temperature

Applicant's summary and conclusion

Conclusions:
Ecotoxicological studies are conducted at relatively low concentrations (e.g. 100 mg/l).
Corresponding hydrolysis tests with 100 mg P2O5 in 1000 ml of water result in slightly
acidic solutions (pH 3.6). No significant difference in composition could be found after
residence times of 1 h, 4 h and 24 h, which indicates that hydrolysis subsequent to the
primary reaction is extremely slow. The main component is tetraphosphoric acid
(approx. 65%) in combination with minor mono-, di-, and triphosphoric acid.
Executive summary:

Ecotoxicological studies are conducted at relatively low concentrations (e.g. 100 mg/l). Corresponding hydrolysis tests with 100 mg P2O5 in 1000 ml of water result in slightly acidic solutions (pH 3.6). No significant difference in composition could be found after residence times of 1 h, 4 h and 24 h, which indicates that hydrolysis subsequent to the primary reaction is extremely slow. The main component is tetraphosphoric acid (approx. 65%) in combination with minor mono-, di-, and triphosphoric acid.