Ruthenium

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

transformation / dissolution of metals and inorganic metal compounds

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Series on Testing and Assessment No. 29 (23-Jul-2001): Guidance document on transformation/dissolution of metals and metal compounds in aqueous media

Qualifier:

according to guideline

Guideline:

other: UN Transformation/Dissolution Protocol (T/DP) for Metals and Sparingly Soluble Metal Compounds.

GLP compliance:

no

Type of method:

other: Transformation/dissolution

Type of test:

screening transformation/dissolution test - sparingly soluble metal compounds

Mean dissolved conc.:

0 µg/L

Element analysed:

Ruthenium

Loading of aqueous phase:

100 mg/L

Incubation duration:

24 h

Test conditions:

pH 8.5 (8.71 - 8.76), 21.1 - 21.9°C

Type of test:

screening transformation/dissolution test - sparingly soluble metal compounds

Mean dissolved conc.:

0 µg/L

Element analysed:

Ruthenium

Loading of aqueous phase:

100 mg/L

Incubation duration:

24 h

Test conditions:

pH 6 (6.0 - 6.9), 21.8 - 22.5°C

Type of test:

full transformation/dissolution test - metals and sparingly soluble metal compounds

Mean dissolved conc.:

0 µg/L

Element analysed:

Ruthenium

Loading of aqueous phase:

1 mg/L

Incubation duration:

28 d

Test conditions:

pH 6 (5.93 - 6.09), 21.0 - 21.8°C

Type of test:

full transformation/dissolution test - metals and sparingly soluble metal compounds

Mean dissolved conc.:

0 µg/L

Element analysed:

Ruthenium

Loading of aqueous phase:

10 mg/L

Incubation duration:

7 d

Test conditions:

pH 6 (5.93 - 6.06), 20.5 - 21.5°C

Type of test:

full transformation/dissolution test - metals and sparingly soluble metal compounds

Mean dissolved conc.:

0.02 µg/L

Element analysed:

Ruthenium

Loading of aqueous phase:

100 mg/L

Incubation duration:

7 d

Test conditions:

pH 6 (5.94 - 6.1), 20.4 - 21.5°C

Definitive 7 and 28 days T/D tests were only performed at pH 6 on the grounds that metals are generally more reactive at this pH than pH 8.5

Conclusions:

Over 28 days at a loading rate of 1 mg L-1, there was no change in ruthenium concentration, within analytical limits. For the 10 and 100 mg L-1 loadings after 7 days net concentration changes of 0.00 µg/L (

Executive summary:

Skeaff and Beaudoin (2011) is a non-GLP study but follows a standard guideline for transformation/dissolution (TD) tests and is considered suitable for assessing this endpoint.

The results from the 24-hour scoping tests at pH 6 and 8.5 revealed that Ru was within the sub-µg L-1 analytical detection limits, and singularly unreactive at either pH.

Over 28 days at a loading rate of 1 mg L^-1, there was no change in ruthenium concentration, within analytical limits. For the 10 and 100 mg L^-1loadings after 7 days net concentration changes of 0.00 µg/L (<LOQ) and 0.02 µg L^-1, were observed respectively.

Description of key information

Over 28 days at a loading rate of 1 mg L-1, there was no change in ruthenium concentration, within analytical limits. For the 10 and 100 mg L-1loadings after 7 days net concentration changes of 0.00 µg L-1 (<LOQ) and 0.02 µg L-1, were observed respectively.

Additional information

Skeaff and Beaudoin (2011) is a non-GLP study but follows a standard guideline for transformation/dissolution (TD) tests and is considered suitable for assessing this endpoint.

The results from the 24-hour scoping tests at pH 6 and 8.5 revealed that Ru was within the sub-µg L-1 analytical detection limits, and singularly unreactive at either pH.

Over 28 days at a loading rate of 1 mg L^-1, there was no change in ruthenium concentration, within analytical limits. For the 10 and 100 mg L^-1 loadings after 7 days net concentration changes of 0.00 µg L-1 (<LOQ) and 0.02 µg L^-1, were observed respectively.