Triiron bis(orthophosphate)

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

04 Dec - 06 June 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Key result

Water solubility:

1.5 mg/L

Conc. based on:

test mat.

Loading of aqueous phase:

200 mg/L

Incubation duration:

> 99 - <= 101 d

Temp.:

20 °C

pH:

> 5.7 - < 6.4

Details on results:

Under the conditions of this test (flask method; loadings of 200.2 mg test item/L and 201.0 mg test item/L in vessel 1 and 2, respectively), a solubility equilibrium was observed during the testing (days 99 – 101). The mean amount of dissolved iron, during the test at 20.0 ± 1.0°C is 699.62 ± 220.55 µg Fe/L (determined as dissolved iron, separated by filtration from undissolved test item). This corresponds to calculated dissolved triiron bis(orthophosphate) of 1507.8 ± 475.3 µg test item/L. The pH in test item loaded vessels was in the range of 5.7 – 6.4, whereas the pH in method blanks ranged from 6.3 – 7.1.

Conclusions:

The water solubility of the test material is 1.5 mg/l.

Description of key information

Water solubility: 1.5 mg/L (OECD 105, GLP)

Key value for chemical safety assessment

Water solubility:

1.5 mg/L

at the temperature of:

20 °C

Additional information

The substance is considered as poorly soluble metal compound based on the result from a 101 days water solubility test according to OECD 105 (1.5 mg/L at 20 °C with a loading 200 mg/L)