4-(2-butenylidene)-3,5,5-trimethylcyclohex-2-en-1-one

Water solubility

Link to relevant study record(s)

Reference

Endpoint:

water solubility

Type of information:

experimental study

Adequacy of study:

key study

Study period:

21 to 27 October 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 105 (Water Solubility)

Version / remarks:

modified according to Letinski et al. (2002) and OECD 123 (2006)

Qualifier:

according to guideline

Guideline:

EU Method A.6 (Water Solubility)

Version / remarks:

modified according to Letinski et al. (2002) and OECD 123 (2006)

GLP compliance:

yes (incl. QA statement)

Remarks:

Staatliches Gewerbeaufsichtsamt Hildesheim, Germany

Type of method:

flask method

Remarks:

flask method with slow stirring approach

Key result

Water solubility:

361 mg/L

Incubation duration:

> 76 h

Temp.:

20 °C

pH:

5

Test Temperature during the Incubation Phase and the Definitive Testing (measured hourly)

Intended temperature [°C]	Measured temperature [°C]
		Replicate 1	Replicate 2
20.0 ± 0.5	Min.	20.00	19.96
	Max.	20.09	20.06
	Mean value	20.03	19.99
	SD ±	0.01	0.02

Min = Minimum temperature measured

Max = Maximum temperature measured

SD = Standard deviation

 

Check of the pH-value

Replicate	pH-Value	Mean
1	5.058	5.0
2	4.964

 

Check of the Tyndall-Effect

All samples were checked negative for a Tyndall effect verifying the absence of colloidal dispersed matter.

 

Solubility Results: Water Solubility Results at 20 °C

Sampling of equilibrium	Incubation time (1) [h]	Calculated Concentration (2) [mg/L]
		Replicate 1	Replicate 2
1 *	72.57	318	346
2 *	74.58	313	342
3 *	76.66	318	348
4	94.83	351	374
5	96.83	348	372
6	98.99	350	375
7	118.99	351	371
8	120.99	347	371
9	122.99	347	371	Overall
	Mean	349	373	361
	Deviation [%]	1.1	0.9	6.8

(1) = Time after application

(2) = Dilution factor of 10 and exact weight of the external standard taken into account

* = Not taken into account, as equilibrium was not achieved

 

 

Conclusions

The water solubility of the test substance was determined at 20 °C and pH 5.0 to be 361 mg/L.

Conclusions:

A water solubility value of 361 mg/L (at 20 °C, pH = 5.0) was determined for the test substance according to OECD 105. modified according to Letinski et al. (2002) and OECD 123 (2006)

Description of key information

Water solubility: 361 mg/L at 20 °C, pH = 5.0 (EU Method A.6, slow stirring method)

Key value for chemical safety assessment

Water solubility:

361 mg/L

at the temperature of:

20 °C