Benzenesulfonic acid, mono- and dialkylation products with C16-20 (even numbered, branched and linear) olefins, barium salts, barium carbonate, overbased, including distillates (petroleum), hydrotreated, solvent-refined, solvent-dewaxed, or catalytic dewaxed, light or heavy paraffinic C15-C50

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

6 June 2017 to 14 June 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

no

GLP compliance:

yes

Type of method:

flask method

Key result

Water solubility:

0.67 mg/L

Conc. based on:

test mat.

Temp.:

20 °C

pH:

6

Details on results:

PRELIMINARY TEST
- The test material was a liquid. The preliminary test indicated that the test material was soluble at a level of < 1 g/L.

DEFINITIVE TEST
- Samples were taken from the three flasks at two time points: Day 7 and Day 8. Table 1 summarises the analytical measurements from the experiment.
- The between day difference between Day 7 and 8 was less than 15%. No other sampling was required. The amount of test material dissolved in water was 0.67 mg/L. The test temperature ranged from 19.6 to 20.4°C (20.0 ± 0.4°C).
- The test material had a water solubility, corrected for purity, of 0.67 mg/L (0.00067 g/L) at 20°C as determined by OECD Test No. 105.

OBSERVATIONS
- No chemical instability was observed during the test. In the preliminary test, the test material in water is a clear solution with excess test material remaining in brown globules adhering to the glass. With vigorous shaking it does disperse and exhibit some surfactant characteristics, but a significant residue of smaller brown globules remain.

Table 1: Results Summary

Sample	Day 7 (mg/L)	pH	Day 8 (mg/L)	pH
Sample 1	0.83	6	0.93	6
Sample 2	0.86	6	0.93	6
Sample 3	0.87	6	0.97	6
Timepoint’s Average Test Material Concentration	0.85		0.94
Average Test Material Concentration Corrected for 75% Purity	0.64		0.71
Within Day RSD	2.2 %		2.7 %
Between Day Average Test Material Concentration	0.67 mg/L
Between Day Difference	10.2 %

RSD = Relative Standard Deviation

Conclusions:

Under the conditions of this study, the test material had a water solubility, corrected for purity, of 0.67 mg/L (0.00067 g/L) at 20°C.

Executive summary:

The water solubility of the test material was determined in accordance with the standardised guideline OECD 105 under GLP conditions using the flask method.

A preliminary test was conducted in order to approximate the amount of test material that would dissolve in water and the time required to reach saturation. The preliminary test indicated that the test material was soluble at a level of < 1 g/L.

In the definitive test, samples were taken from the three flasks at two time points: Day 7 and Day 8 for UV analysis. The between day difference between Day 7 and 8 was less than 15%. No other sampling was required. The amount of test material dissolved in water was 0.67 mg/L. The test temperature ranged from 19.6 to 20.4°C (20.0 ± 0.4°C).

Under the conditions of this study, the test material had a water solubility, corrected for purity, of 0.67 mg/L (0.00067 g/L) at 20°C.

Description of key information

Under the conditions of the study, the test material had a water solubility, corrected for purity, of 0.67 mg/L (0.00067 g/L) at 20°C.

Key value for chemical safety assessment

Water solubility:

0.001 g/L

at the temperature of:

20 °C

Additional information

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

A preliminary test was conducted in order to approximate the amount of test material that would dissolve in water and the time required to reach saturation. The preliminary test indicated that the test material was soluble at a level of < 1 g/L.

In the definitive test, samples were taken from the three flasks at two time points: Day 7 and Day 8 for UV analysis. The between day difference between Day 7 and 8 was less than 15%. No other sampling was required. The amount of test material dissolved in water was 0.67 mg/L. The test temperature ranged from 19.6 to 20.4 °C (20.0 ± 0.4°C).

Under the conditions of this study, the test material had a water solubility, corrected for purity, of 0.67 mg/L (0.00067 g/L) at 20°C.