Shale oils, heavy

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

4th October - 8th October 2010

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 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

yes

Type of method:

OECD harmonised ring method

Surface tension:

52.299 mN/m

Temp.:

20 °C

Conc.:

45.5 mg/L

Remarks on result:

other: ± 1.16 nM/m

Table 1: Surface tension of the solvent

solvent	surface tension at temperature 20 °C, mN / m
	1. parallel measurement	2. parallel measurement	3. parallel measurement	4. parallel measurement	average value
water – measurement value	72.105	71.296	71.614	71.861	71.719±0.3
water – published value	72.75

 

Table 2: Surface tenston of the shale oil solution

tested water solution	surface tension at temperature 20 °C, mN / m
	1. parallel measurement	2. parallel measurement	3. parallel measurement	average value
Shale oils, heavy	53.414	50.699	52.784	52.299±1.16

 

Table 3: The amount of solved Shale oils, heavy in tested solution, determined by the evapouration method

tested water solution	solved Shale oils, heavy in water at temperature 20°C, g/l
	1. parallel measurement	2. parallel measurement	3. parallel measurement	average value
Shale oils, heavy	0.0536	0.0382	0.0448	0.0455±0.0063

Conclusions:

The surface tension of aqueous solution of Shale oils, heavy with concentration 0.046 g/l (determined by method evaporation residue) is 52.299 ± 1.16 mN / m. Surface tension of Shale oil, heavy is lower than 60 mN / m under the conditions of this method, so it should be regarded as being surface-active material.

Executive summary:

The surface tension of shale oils, heavy fraction was determined according to the OECD ring method. The OECD 115 guideline and EU method A.5. The study was performed according to the principles of GLP, although the laboratory is not yet certificated.

The surface tension of aqueous solution of Shale oils, heavy with concentration 0.046 g/l (determined by method evaporation residue) is 52.299 ± 1.16 mN / m. Surface tension of Shale oil, heavy is lower than 60 mN / m under the conditions of this method, so it should be regarded as being surface-active material.

Description of key information

The surface tension of aqueous solution of Shale oils, heavy with concentration
 0.046 g/l (determined by method evaporation residue) is 52.299 ± 1.16 mN / m. 
Surface tension of Shale oil, heavy is lower than 60 mN / m under the conditions 
of this method, so it should be regarded as being surface-active material. 

Key value for chemical safety assessment

Surface tension:

52.299

in mN/m at 20°C and concentration in mg/L:

46