Reaction mass of calcium hydrogen phosphonate and dialuminium tricalcium hexaoxide

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

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

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Version / remarks:

adopted May 12, 1981

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Version / remarks:

EEC Directive 84/449 EEC, EEC Publication No. L251, September 1984

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Key result

Water solubility:

0.68 g/L

Temp.:

20.5 °C

pH:

11.4

Details on results:

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, using the flask method. The pH of the solution was 11.4.

Conclusions:

Water solubility = 0.68 +/- 0.04 g/L at 20.5 +/- 0.4°C

Executive summary:

The water solubility 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, placed on a magnetic stirring device in a thermostatically controlled water bath at 30°C and 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.

Description of key information

0.68 +/- 0.04 g/L at 20.5 +/- 0.4°C
EU Method A.6 (Water Solubility), 1984 and OECD Guideline 105 (Water Solubility), 1981

Key value for chemical safety assessment

Water solubility:

0.68 g/L

at the temperature of:

20 °C

Additional information

The water solubility 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. Flasks were securely closed, placed on a magnetic stirring device in a thermostatically controlled water bath at 30°C and 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 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.