2,5-furandione, dihydro-, mono- C18- alkenyl derivs. reaction products with potassium hydroxide

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

19 Sep 2017 - 24 Nov 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

2009

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

2006

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7950 (Vapor Pressure)

Version / remarks:

1996

Deviations:

no

GLP compliance:

yes

Type of method:

effusion method: isothermal thermogravimetry

Test material

Test material information

Constituent 1

Reference substance name:

Potassium hydrogen 2-octadecenylsuccinate

EC Number:

296-086-4

EC Name:

Potassium hydrogen 2-octadecenylsuccinate

Cas Number:

92218-39-8

Molecular formula:

C22H40O4.K

IUPAC Name:

hydrogen potassium 2-octadec-1-en-1-ylsuccinate

Specific details on test material used for the study:

Decomposition temp.: 200°C

Results and discussion

Vapour pressure

Vapour pressure 1

Key result

Temp.:

20 °C

Vapour pressure:

>= 0.029 - <= 0.69 Pa

Vapour pressure 2

Key result

Temp.:

25 °C

Vapour pressure:

>= 0.043 - <= 0.85 Pa

Any other information on results incl. tables

Table: Results of the isothermal TGA analysis (test item)

Experiment	Temperature [°C]	Weight loss [µg/min]	νT [g/cm^2/h]	log νT	log PT	PT[Pa]
1	160	18.0670	2.16x10^-3	-2.67	1.72	53
	170	21.9934	2.63x10^-3	-2.58	1.83	68
	180	25.6485	3.06x10^-3	-2.51	1.92	83
2	160	14.2524	1.70x10^-3	-2.77	1.59	39
	170	16.4149	1.96x10^-3	-2.71	1.67	47
	180	19.0748	2.28x10^-3	-2.64	1.75	57
3	160	15.4001	1.84x10^-3	-2.74	1.64	43
	170	20.2238	2.41x10^-3	-2.62	1.79	61
	180	26.0817	3.11x10^-3	-2.51	1.93	85

Using the results of Experiment 1 and Experiment 2, the curve of log PT of the test item as function of the reciprocal temperature had a coefficient of correlation <0.99. Therefore, a third experiment was performed. Coefficient of correlation using the results of Experiment 1 and Experiment 3 was <0.99. Coefficient of correlation using the results of Experiment 2 and Experiment 3 was <0.99. Since the test item is a mixture (UVCB), it was decided to report a range for the vapour pressure using the plot of the log PT of the test item as function of the reciprocal temperatures for each individual experiment. 

Experiment 1:  log PT= -1913 x1/T + 6.14 (r = 0.998, n = 3). 

Experiment 2:  log PT= -1589 x 1/T + 5.26 (r = 0.9995, n = 3). 

Experiment 3:  log PT= -2875 x 1/T + 8.27 (r = 0.9999, n = 3).

Plots: see attached background material.

 

Table: Vapour pressure results

Experiment 1

Temperature [°C]		log PT	PT [Pa]
20		-0.38	0.41
25		-0.27	0.53
Experiment 2
Temperature [°C]		log PT	PT [Pa]
20		-0.16	0.69
25		-0.07	0.85
Experiment 3
Temperature [°C]		log PT	PT [Pa]
20		-1.53	2.9E-2
25		-1.37	4.3E-2

 

Applicant's summary and conclusion

Conclusions:

The vapour pressure of the substance at 20°C was determined to be in the range from 2.9E-2 to 0.69 Pa.
The vapour pressure of the substance at 25°C was determined to be in the range from 4.3E-2 to 0.85 Pa.

Executive summary:

The vapour pressure of the substance was determined using the isothermal thermogravimetric effusion method in a GLP study according to EC A.4, OECD 104 and OPPTS 830.7950.

From the measured weight losses in the temperature range 160 -180°C, the vapour pressure of the substance was determined. Three experiments were performed. Because of the relatively large differences between the results, the vapour pressure of the substance was determined from each of the three vapour pressure regression curves. The vapour pressure of the substance was reported as a range. The vapour pressure of the substance at 20°C was determined to be in the range from 2.9E-2 to 0.69 Pa. The vapour pressure of the substance at 25°C was determined to be in the range from 4.3E-2 to 0.85 Pa.

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