1,1,4,4-tetramethylbutane-1,4-diyl bis(2-ethylperoxyhexanoate)

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

August 2011

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Well conducted study, based on OECD guideline 105, certificate of analysis included in the report.

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

GLP compliance:

no

Type of method:

other: slow-stirring technique (<100 rpm)

Key result

Water solubility:

27.9 µg/L

Temp.:

20 °C

Remarks on result:

other: pH not noted

The determined final result for water solubility of the test substance is a maximum value. During the total analysis period of 3 days the maximum value of 27.9 µg/L was detected after 1 day. After this time the detected values for water solubility decreased again. The reason for this can be a thermal decomposition at the test temperature (20°C) after a certain period of time or possible hydrolysis of the test substance. No further information is available to determine the exact reason for the decrease of concentration.  

The results of determined concentration of test substance at the different time points are presented in table I, average results per time point are graphically displayed in figure 1.

Concentration test substance at different time points

Sample	Time period (hrs)	Final conc. (µg/L)	Average conc. (mg/L)
TX 141 t=2.5 hours I	2.5	< 0.03*	< 0.03*
TX 141 t=2.5 hours II	2.5	< 0.03*
TX 141 t=5 hours I	5	1.1	1.4
TX 141 t=5 hours II	5	1.7
TX 141 t=7 hours I	7	8.4	7.4
TX 141 t=7 hours II	7	6.4
TX 141 t=23 hours I	23	27.5	27.9
TX 141 t=23 hours II	23	28.2
TX 141 t=2 days I	48	24.6	25.2
TX 141 t=2 days II	48	25.7
TX 141 t=3 days I	72	13.9	13.6
TX 141 t=3 days II	72	13.4

           * Limit of detection

See the attachment for the graph on

Figure 1 :Average results water solubility per time point

Conclusions:

Interpretation of results (migrated information): insoluble (< 0.1 mg/L)
The maximum water solubility of 1,1,4,4-tetramethylbutane-1,4-diyl bis(2-ethylperoxyhexanoate) is 27.9 µg/L at 20°C.

Executive summary:

The water solubility of 1,1,4,4-tetramethylbutane-1,4-diyl bis(2-ethylperoxyhexanoate)was determined based on OECD guideline 105. The data on water solubility represent the saturation mass concentration of the test substance in water.

The determined final result for water solubility of the test substance is a maximum value. After 1 day the maximum value of 27.9 µg/L was detected, after this time the detected values for water solubility decreased again. The reason for this can be a thermal decomposition at the test temperature (20°C) after a certain period of time or possible hydrolysis of the test substance. No further information is available to determine the exact reason for the decrease of concentration.

The maximum water solubility of 1,1,4,4-tetramethylbutane-1,4-diyl bis(2-ethylperoxyhexanoate) is 27.9 µg/L at 20°C.

 

Description of key information

The maximum water solubility of 1,1,4,4-tetramethylbutane-1,4-diyl bis(2-ethylperoxyhexanoate) is 27.9 µg/L at 20°C.

Key value for chemical safety assessment

Water solubility:

27.9 µg/L

at the temperature of:

20 °C