Reaction mass of 4-tert-butyl-2,5-xylenol and 6-tert-butyl-2,4-xylenol

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

February 10 to March 12, 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Meets the requirements of GLP. There are no deviations from the recommended guideline.

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

flask method

Key result

Water solubility:

169.5 mg/L

Temp.:

20 °C

pH:

6

Conclusions:

At the plateau, the concentration of the test substance in water had reached  169.5 ± 10.3 mg/L at 20 ± 0.5 °C.

Executive summary:

In a preliminary study, the solubility of the test item in water was estimated to lie between 100 and 1000 mg/L. In the main study, 5000 - 6000 mg/L were weighed into each of six individual vessels, water was added, and the vessels were shaken at 20 ±0.5 C. On the days 1, 2, and 3, vessel 1 was taken from the shaking apparatus and stored at 20 ±0.5 °C for equilibration. Samples were taken, centrifuged and extracted twice with iso-octan. The extracts were analysed using GC/FID as shaking of the test vessels was continued. No differences above 15% in the concentration of the solution could be determined between the sampling dates 1, 2, and 3, supporting the hypothesis that the maximum concentration of the test item had been reached. Therefore, on day 3, vessels 2-6 were sampled and analysed in the same way. At the plateau, the concentration of the test substance in water had reached 169.5 ± 10.3 mg/L at 20 ±0.5 °C= 1.695 ± 0.103 * 10-¹kg/m³(SI units) (mean value ± standard deviation of eight individual vessels).

 

Description of key information

Key study: Experimental result: Test according to OECD guideline 105 and EU method A6. GLP study.

Water solubility:  169.5 ± 10.3 mg/L at 20 ± 0.5 °C

Key value for chemical safety assessment

Water solubility:

169.5 mg/L

at the temperature of:

20 °C

Additional information

Key study: Experimental result: Test according to OECD guideline 105 and EU method A6.

The concentrations of the test substance were determined through a method using gas chromatography. At the plateau, the concentration of the test substance in water had reached 169.5 ± 10.3 mg/L at 20 ±= 1.695 ± 0.103 * 10-1kg/m3(SI units) (mean value ± standard deviation of eight individual vessels).