barium(2+); oxygen(2-); titanium(4+); zirconium(4+) ;calcium (2+)

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Aug 2018

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Qualifier:

no guideline followed

Principles of method if other than guideline:

1.0000 gram +/- 0.005 g reference material was weighed into a 100 mL beaker. 25 mL ultrapure water (≥ 18.2 MΩ) was added. The mixture was stirred on a magnetic stirrer for 15 minutes. The resulting mixture was filtrated over an ashfree filter paper (Whatman Cat No 1440-150).
5 mL of the filtrate was pipetted into a 50 mL volumetric flask. 50 μL yttrium reference standard 1000 ppm was pipetted into the volumetric flask. 2 mL hydrochloric acid 36% was added to the volumetric flask. The volumetric flask was made up to volume with ultrapure water (≥ 18.2 MΩ).
The sample preparation was carried out in duplicate.

GLP compliance:

not specified

Type of method:

flask method

Key result

Water solubility:

906 mg/L

Conc. based on:

element (dissolved fraction)

Remarks:

Barium

Temp.:

20 °C

pH:

7

Conclusions:

For BCZT the titanate-ion is insoluble; barium-ion is soluble based on the value 906 mg/L Ba2+. BCZT has an higher Ba content than BaTi which leads to a higher Ba2+ solubility in BCZT. Barium (Ba2 +) is leached out from BCZT.

Description of key information

Barium calcium zirconate titanate can be considered as slightly soluble in water.
The titanate-ion is insoluble, the barium-ion is soluble, based on the value 906 mg/l Ba2 +

Key value for chemical safety assessment

Water solubility:

906 mg/L

at the temperature of:

20 °C

Additional information

906 mg/l based on Ba2+