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Physical & Chemical properties

pH

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Administrative data

Endpoint:
pH
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1991-06-03 to 1991-06-24
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP, Guideline study
Cross-reference
Reason / purpose for cross-reference:
reference to same study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1991
Report date:
1991

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
other: OECD Guideline 105 (water solubility) adopted May 12, 1981
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: EU Method A.6 (water solubility) EEC Directive 84/449 EEC, EEC Publication No. L251, September 1984
Deviations:
no
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Reference substance name:
Reaction mass of calcium hydrogen phosphonate and dialuminium tricalcium hexaoxide
EC Number:
915-069-0
Molecular formula:
not applicable
IUPAC Name:
Reaction mass of calcium hydrogen phosphonate and dialuminium tricalcium hexaoxide

Results and discussion

pH value
Key result
pH value:
11.4
Temp.:
20.5 °C
Concentration:
0.68 g/L
Remarks on result:
other: 0.68 g/L is the water solubility of the test item

Applicant's summary and conclusion

Executive summary:

The water solubility and the pH of substance "reaction mass of calcium hydrogen phosphonate and dialuminium tricalcium hexaoxide" (a.i. 90 %) was measured in a study performed as flask method according to EU Method A.6 (Water Solubility), 1984 and OECD Guideline 105 (Water Solubility), 1981.

An amount of approximately 0.46-0-55 g of the test substance was weighed into each of three Erlenmeyer flasks. To each flask, 50 mL double distilled water was added. The flasks were securely closed and placed on a magnetic stirring device in a thermostatically controlled water bath at 30°C. The content of each flask was stirred for 24, 48 or 72 hours. After the stirring periods, the flasks were removed from the water bath and re-equilibrated for 24 hours at 20.5 +/- 0.4°C, with occasional agitation. After the re-equilibration period, the samples were analysed on aluminium and calcium using an atomic absorption spectrometric method.

The pH value of each clear water sample from the main study was determined.

The water solubility of substance " reaction mass of calcium hydrogen phosphonate and dialuminium tricalcium hexaoxide" at 20.5 +/- 0.4°C was determined to be 0.68 +/- 0.04 g/L.

The pH of the solution was 11.4.