Strontium hydrogen phosphate

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

January 22, 2014 - February 7, 2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

The study was performed in accordance with the EC A.6 and OECD 105 guidelines and complied with the principles of GLP.

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Version / remarks:

(2008)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Version / remarks:

(1995)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7840 (Water Solubility)

Version / remarks:

(1998)

Deviations:

no

GLP compliance:

yes

Type of method:

flask method

Key result

Water solubility:

62.1 mg/L

Temp.:

20 °C

pH:

7.7

Remarks on result:

other: Mean of the analysed concentrations at t=24, 48 and 72h. Calculated from the mean analysed Strontium (Sr) concentration of 29.7 mg Sr/L.

Details on results:

- A small response of strontium was detected in the pretreated sample from the blank solution. Since the contribution relative to the the response from the test substance samples was 0.003%, no correction was applied.
- The maximum difference (MD) of the concentrations determined in the 24, 48 and 72 hour test samples was ≤ 15% (3.0% was calculated).

Water solubility results

Stirring time [hours]	Analysed concentration [mg Sr/L]	Mean [mg Sr/L]	MD [%]	pH
24	30.2	29.7	3.0	7.7
48	29.7			7.7
72	29.3			7.7

29.7 mg Sr/L x 183.6 / 88 = 62.1 mg test substance/L

Conclusions:

The solubility of the test item in water was 62.1 mg/L (calculated, based on 29.7 mg Sr/L)

Executive summary:

The water solubility of the substance at 20°C has been determined as 62.1 mg/L (GLP-compliant study in accordance with EC A.6, OECD 105 and OPPTS 830.7840) using the flask method. The water solubility was calculated from the ICP-MS measured Strontium (Sr) concentration of 29.7 mg Sr/L. The pH of the saturated solution was 7.7.

Description of key information

The water solubility of the substance at 20°C, based on Strontium (Sr), has been determined as 29.7 mg Sr/L. From this, the water solubility of the substance was calculated to be 62.1 mg/L.

Key value for chemical safety assessment

Water solubility:

62.1 mg/L

at the temperature of:

20 °C

Additional information

The water solubility of the substance, based on Strontium (Sr), has been determined using the flask method (GLP-compliant study in accordance with EC A.6, OECD 105 and OPPTS 830.7840). From this, the water solubility of the substance was calculated based on molecular weight ratio. The pH of the saturated solution was 7.7.