Di-tert-butyl 1,1,4,4-tetramethylbut-2-yn-1,4-ylene diperoxide

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 2013-10-21 to 2013-10-25

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Version / remarks:

27 July 1995

Deviations:

no

GLP compliance:

no

Type of method:

other: slow stirring method

Key result

Water solubility:

2.2 mg/L

Incubation duration:

>= 24 - <= 96 h

Temp.:

20 °C

pH:

ca. 7

The determined results for the water solubility was an average result for the time points 48, 72 and 96 hours and was calculated to be 2.2 mg/L. The result of the 24 hour time point differed more than 15 % from the next time point and was therfore not included in the average calculation. The pH value of the samples, taken at the different time points, was measured with pH indicator stripes to be 7. The results of dertermined concentration of the test substance at the different time points are presented in table 1.

Table 1: Concentration of the test substance at different time points

Sample name	Time period hrs	Final conc. µg/L	Avg conc. µg/L	Difference %
Erlenmeyer 1 A	24	1637	1642	-
Erlenmeyer 1 B	24	1648
Erlenmeyer 2 A	48	2164	2178	24.6
Erlenmeyer 2 B	48	2191
Erlenmeyer 3 A	72	2126	2167	-0.5
Erlenmeyer 3 B	72	2208
Erlenmeyer 4 A	96	2221	2274	4.7
Erlenmeyer 4 B	96	2327
	AVG total (48, 72 and 96 hrs)		2206 µg/L
	To be reported		2.2 mg/L

Conclusions:

A water solubility of 2.2 mg/L was determined for the test item.

Executive summary:

The water solubility of the test item was determined in accordance with OECD TG 105 at a temperature of 20.0 °C +/- 0.5 °C. The data on water solubility represented the saturation mass concentration of the test substance in water. The determined final result for water solubility of the test item was 2.2 mg/L at 20 °C.

Description of key information

A water solubility of 2.2 mg/L was determined for the test item.

Key value for chemical safety assessment

Water solubility:

2.2 mg/L

at the temperature of:

20 °C

Additional information

The water solubility of the test item was determined in accordance with OECD TG 105 at a temperature of 20.0 °C +/- 0.5 °C. 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 item was 2.2 mg/L at 20 °C.