Tin zinc oxide (SnZnO3)

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

9 March 1990 - 26 March 1990

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted to GLP in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results.

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Deviations:

yes

Remarks:

See below

Principles of method if other than guideline:

The guideline states that the test material should be dissolved in a suitable solvent and coated onto the support material. No suitable solvent could be found and so the test material was dry mixed with the support material.
This deviation was not considered to affect the validity of the study or the results.

GLP compliance:

yes

Type of method:

column elution method

Water solubility:

13 mg/L

Temp.:

20 °C

pH:

7.6

Details on results:

In the first determination (A), it was apparent that saturation was not reached, even after 98 hours; these values were not used to calculate the water solubility.
In the second determination (B), saturation was reached after 54 hours (Sample Number B6) and the values from sample numbers B6, B7, B8, B9 and B10 were used to calculate the water solubility.

Mean of B6, B7, B8, B9 and B10 = 13 mg/L
Range = 11.7 to 13.6 mg/L
Standard deviation = 0.000733

Table 1 Summary of Results

Sample Number	Sampling Time (hours)	Concentration of Test Material (mg/L)	Solution pH
A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11	3 24 27 29 48 52 54 72 73 97 98	5.15 8.78 8.51 8.88 9.09 9.51 9.62 10.2 10.6 12.3 12.0	7.6. 7.2 8.1 8.2 7.8 7.8 7.8 7.5 7.6 7.6 7.5
B1 B2 B3 B4 B5 B6 B7 B8 B9 B10	24 27 29 48 52 54 72 73 97 98	9.09 9.35 9.56 10.3 12.5 13.1 13.1 11.7 13.3 13.6	7.2 8.2 8.2 7.8 7.9 7.8 7.6 7.6 7.6 7.6

Conclusions:

Interpretation of results (migrated information): slightly soluble (0.1-100 mg/L)
The water solubility was determined to be 13 mg/L at 20.0 ± 0.5 °C.

Executive summary:

A study was carried out to determine the water solubility of the test material in accordance with the standardised guideline EU Method A.6.

The investigation was carried out using the column elution method with a recirculating pump and the water solubility was determined to be 13 mg/L at 20.0 ± 0.5 °C.

Description of key information

The water solubility was determined to be 13 mg/L at 20.0 ± 0.5 °C.

Key value for chemical safety assessment

Water solubility:

13 mg/L

at the temperature of:

20 °C

Additional information

A study was carried out to determine the water solubility of the test material in accordance with GLP and the standardised guideline EU Method A.6.

The investigation was carried out using the column elution method with a recirculating pump and the water solubility was determined to be 13 mg/L at 20.0 ± 0.5 °C.