Ethanol, 2,2'-iminobis-, N-tallow alkyl derivs., N-oxides

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-11-14 to 2019-11-29

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

2006

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7950 (Vapor Pressure)

Version / remarks:

1996

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: OECD Guideline 113 (Thermal Stability)

Version / remarks:

1981

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

effusion method: vapour pressure balance

Key result

Temp.:

20 °C

Vapour pressure:

0.019 Pa

Key result

Temp.:

25 °C

Vapour pressure:

0.025 Pa

Key result

Vapour pressure:

0.089 Pa

Thermal Stability

In the temperature range of 110 °C - 180 °C an exothermic effect was observed with a decomposition energy of -300 J/g. An endothermic effect was observed in the temperature range of 190 °C - 270 °C.

Table 1: Results of the DSC-measurement

No.	Sample weight / mg	Start of effects / °C	Energy²/ J/g
PN 16653	10.62	110 190	-300 (exothermic) +60 (endothermic)

Effusion method: Vapour pressure balance

The vapour pressure was measured in the temperature range of 42 °C to 68 °C. The measured vapour pressure values together with the measured temperatures are listed in Table 2.

Table 2: Results of the Effusion method

No.	Temperature / °C	Vapour pressure/ Pa
1	42	5.99 x 10^-2
2	47	7.80 x 10^-2
3	52	9.46 x 10^-2
4	58	1.30 x 10^-1
5	63	1.61 x 10^-1
6	68	1.93 x 10^-1

From the measured data points of the vapour pressure curve the constants A and B of the Antoine equation can be derived by regression of the data points to

A = 5.5076

B = -2120.06

C = 273.15

The vapour pressure of the test item calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour pressure and OECD Test Guideline 104 (2006) is shown in Table 3.

Table 3: Calculated vapour pressure values for 20, 25 and 50 °C

Temperature/ °C	Vapour pressure/ Pa
20	1.9 x 10^-2
25	2.5 x 10^-2
50	8.9 x 10^-2

Conclusions:

The test item has a vapour pressure of 0.019, 0.025 and 0.089 Pa at 20, 25 and 50 °C, respectively.

Executive summary:

The vapour pressure of the test item was determined according to OECD guideline 104, EU Method A.4 and OPPTS 830.7950. The vapour pressure was calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C. For the test item a vapour pressure of 0.019, 0.025 and 0.089 Pa at 20, 25 and 50 °C was determined, respectively.

Description of key information

The test item has a vapour pressure of 0.019, 0.025 and 0.089 Pa at 20, 25 and 50 °C, respectively.

Key value for chemical safety assessment

Vapour pressure:

0.019 Pa

at the temperature of:

20 °C

Additional information

The vapour pressure of the test item was determined according to OECD guideline 104, EU Method A.4 and OPPTS 830.7950. The vapour pressure was calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C. For the test item a vapour pressure of 0.019, 0.025 and 0.089 Pa at 20, 25 and 50 °C was determined, respectively.