Shale oils

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

21st July - 7th September 2005

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Study conducted 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:

OECD Guideline 105 (Water Solubility)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Water solubility:

0.22 other: g TOC/l

Temp.:

20 °C

pH:

4.88 - 5.08

Details on results:

The saturation concentration of Shale Oil at room temperature was estimated by a simplified flask method in the preliminary test to be higher than 10^-2 g/l. Therefore, the flask shaking test was performed.
The concentrations were determined after a shaking time of 24 hours, 48 hours and 72 hours, respectively, at 30°C. Afterwards the samples were equilibrated for another 24 hours at 20.0°C. The quantification was performed by TOC measurements. The measured results differ by less than 15 %. Therefore, the study is considered to be valid.
As neither the chemical structure nor the molecular weight is known, it is not possible to calculate the water solubility of the test item from the determined content of TOC. Therefore, the results are given in [mg TOC/l].

Table 1: Water Solubility of Shale Oil

Sample No.	Shaking time at 30 ºC	Concentration analysed [mg TOC/l]	Concentration calculated [g TOC/l]	Water solubility calculated (rounded) [g/]
1	72	68.30	0.34^1	0.22 SD = 0.01
2		45.40	0.23
3	48	43.17	0.22
4		40.84	0.20
5	24	44.58	0.22
6		42.62	0.21

¹ Outlier (not used for the calculation)

Conclusions:

Interpretation of results (migrated information): moderately soluble (100-1000 mg/L)
The water solubility of Shale Oil at 20 °C was determined to be 0.22 g TOC/l (standard deviation ± 0.01 g TOC/l).

Executive summary:

The water solubility of the test material was investigated in a study which was conducted in accordance with the standardised guideline OECD 105, under GLP conditions, following the flask method.

Under the conditions of the study, the water solubility of Shale Oil was determined to be 0.22 g TOC/l (standard deviation ± 0.01 g TOC/l) at 20 °C.

Description of key information

The water solubility of Shale Oil at 20 °C was determined to be 0.22 g TOC/l (standard deviation ± 0.01 g TOC/l).

Key value for chemical safety assessment

Water solubility:

0.22 g/L

at the temperature of:

20 °C

Additional information

The water solubility of the test material was investigated in a study which was conducted in accordance with the standardised guideline OECD 105, under GLP conditions, following the flask method. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).

Under the conditions of the study, the water solubility of Shale Oil was determined to be 0.22 g TOC/l (standard deviation ± 0.01 g TOC/l) at 20 °C.