Neodecanoic acid, iron salt

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

The study was initiated on 13 April 2017 and completed on the date the final report was signed by the Study Director.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: The experimental procedure followed the Knudsen cell effusion method described in OECD Guideline 104.

Version / remarks:

The experimental procedure followed the Knudsen cell effusion method described in OECD Guideline 104.

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

effusion method: Knudsen cell

Remarks:

The experimental procedure followed the Knudsen cell effusion method described in OECD Guideline 104.

Specific details on test material used for the study:

Sponsor batch: E01133-065
Purity: 100 %
Arrival date: 6 March 2017
Re-test date: 31 July 2019
Storage conditions: Refrigerated (2 to 8°C) under nitrogen. The test substance was supplied in a translucent HDPE container and has been stored in this container. The test substance was stored in a fridge, in the dark when not in use.

Key result

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

0.001 Pa

Test no.:

#1

Temp.:

25 °C

Vapour pressure:

0.002 Pa

Measured values ranged between 1.02 and 9.57 mPa, which falls within the applicability domain of the Knudsen cell method (10^-10 to1 Pa, according to the guideline). The vapour pressure of the test item was 0.00125 Pa at 20°C and 0.00183 Pa at 25°C, interpolated from the regression.

There was no difference between the FTIR analysis of the native test substance, the control or any of the tested material, confirming stability during testing.

Table 1: Vapour pressure of the test item

Test Article and Crucible Information
TA information				Crucible dimensions
Identifier	Run No	Molecular weight (g)	Test Number	Depth (μm)	Diameter (μm)	Area (μm^2)	Area (m^2)	Clausing Factor
ESTS 73/17	1	569.6	1	90	984.4	7.61E+05	7.61E-07	0.93583
			2	90	984.7	7.62E+05	7.62E-07	0.93585
ESTS 73/17	2	569.6	1	90	985.2	7.62E+05	7.62E-07	0.93588
			2	90	981.6	7.57E+05	7.57E-07	0.93566
ESTS 73/17	3	569.6	1	90	976.2	7.49E+05	7.49E-07	0.93533
			2	90	985.8	7.63E+05	7.63E-07	0.93592
ESTS 73/17	4	569.6	1	90	982.5	7.58E+05	7.58E-07	0.93571
			2	90	974.9	7.47E+05	7.47E-07	0.93525

Vapour Pressure (VP) Calculations
Date and Time	Temp (°C)	Crucible weight		Vapour Pressure		1/T (K^-1)	Ln (VP)
		Test 1 (mg)	Test 2 (mg)	Test 1 (Pa)	Test 2 (Pa)		Test 1	Test 2
18/05/2017 10:10	20	52.941	53.205	1.02E-03	1.15E-03	3.41E-03	-6.89E+00	-6.77E+00
18/05/2017 10:40		52.933	53.196
18/05/2017 10:51	30	53.058	53.148	3.25E-03	3.27E-03	3.30E-03	-5.73E+00	-5.72E+00
18/05/2017 11:21		53.033	53.123
18/05/2017 11:33	40	53.078	52.706	5.38E-03	5.67E-03	3.19E-03	-5.23E+00	-5.17E+00
18/05/2017 12:03		53.038	52.663
18/05/2017 12:58	50	52.799	53.335	9.57E-03	9.18E-03	3.10E-03	-4.65E+00	-4.69E+00
18/05/2017 13:28		52.728	53.268
Slope:                                   -6667.56			Vapour pressure at 25°C: 0.00183 Pa
Intercept:                          16.0607363			Vapour pressure at 20°C: 0.00125 Pa
Correlation:                       -0.9844136

Conclusions:

Vapour pressure (20°C) OECD 104 (2006) 0.00125 Pa
Vapour pressure (25°C) OECD 104 (2006) 0.00183 Pa

Executive summary:

In a study, according to OECD 104, the vapour pressure of neodecanoic acid, iron salt has been characterised.

Measured values ranged between 1.02 and 9.57 mPa, which falls within the applicability domain of the Knudsen cell method (10^-10 to1 Pa, according to the guideline). The vapour pressure of the test item was 0.00125 Pa at 20°C and 0.00183 Pa at 25°C, interpolated from the regression.

Description of key information

In a study, according to OECD 104, the vapour pressure of neodecanoic acid, iron salt has been characterised.

Measured values ranged between 1.02 and 9.57 mPa, which falls within the applicability domain of the Knudsen cell method (10^-10 to1 Pa, according to the guideline). The vapour pressure of the test item was 0.00125 Pa at 20°C and 0.00183 Pa at 25°C, interpolated from the regression.

Key value for chemical safety assessment

Vapour pressure:

0.001 Pa

at the temperature of:

20 °C

Additional information

Measured values ranged between 1.02 and 9.57 mPa, which falls within the applicability domain of the Knudsen cell method (10^-10 to1 Pa, according to the guideline). The vapour pressure of the test item was 0.00125 Pa at 20°C and 0.00183 Pa at 25°C, interpolated from the regression.

There was no difference between the FTIR analysis of the native test substance, the control or any of the tested material, confirming stability during testing.