2-methyldecan-1-al

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

25 Sep - 14 Nov 2013

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

This study was not conducted in a GLP facility, but was conducted according to international guidelines.

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

GLP compliance:

no

Type of method:

dynamic method

Key result

Temp.:

20 °C

Vapour pressure:

5.39 Pa

Key result

Temp.:

25 °C

Vapour pressure:

8.24 Pa

Vapour pressure:

56.36 Pa

The measured values together with the measured temperatures are listed in Table 1.

The vapour pressure of the substance was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20°C, 25°Cand 50°C. This is shown in Table 2. Reaction and/or decomposition was not observed during the test.

Table 1. Measurement results of vapour pressure at various temperatures

SAMPLE NAME	TEMPERATURE		VAPOUR PRESSURE		CONDITION
	°C	K	Pa	mmHg
Aldehyde C11 MOA	82	355	400	3	Measured up
	91	364	800	6	Measured up
	100	373	1333	10	Measured up
	110	383	2000	15	Measured up
	117	390	2800	21	Measured up
	119	392	3000	22.5	Measured up
	114	387	2466	18.5	Measured up
	104	377	1600	12	Measured up
	94	367	933	7	Measured up
	86	359	533	4	Measured up

Note) Temperature in Kelvin (K) = Temperature in °C+ 273.15

From the measured data points of the vapour pressure curve (with Log P as a function of 1/T), the constants A and B of the Antoine equation were calculated.

Antoine equation: Log P= A+ B*1/(T) P : Vapour pressure in Pa T : Temperature in K A= 11.707

B= -3215.8

Table 2. Estimated vapour pressure

SAMPLE NAME	TEMPERATURE		VAPOUR PRESSURE
	°C	K	Pa	mmHg
Aldehyde C11 MOA	20	293	5.39	4.0 x 10^-2
	25	298	8.24	6.0 x 10^-2
	50	323	56.36	4.2 x 10^-1

Note) Temperature in Kelvin (K) = Temperature in °C+ 273.15

Conclusions:

The vapour pressure of the substance was 5.39 Pa at 20 °C (293 K), 8.24 Pa at 25 °C (298 K) and 56.36 Pa at 50 °C (323 K) (calculated by extrapolation of the measured vapour pressure curve).

Executive summary:

The vapour pressure of the test substance was determined according to the OECD Guideline 104, 23rd March 2006 and EU Method A.4.

The vapour pressure was measured in the temperature range of 82 °C to 119 °C. When the lowest pressure (400 Pa) was then set and the boiling section was heated by an electrical cartridge. At this time, the boiling temperature of the sample reached at 82 °C. When 3000 Pa was set the boiling section was heated by an electrical cartridge heater set up to 300 °C and equilibrium point of the sample was reached at 119°C.

The vapour pressure of the substance was 5.39 Pa at 20 °C (293 K), 8.24 Pa at 25 °C (298 K) and 56.36 Pa at 50 °C (323 K) (calculated by extrapolation of the measured vapour pressure curve). Reaction and/or decomposition of the test material was not observed during the test.

Description of key information

Vapour Pressure = 8.24 Pa at 25 °C; OECD 104; Anon, 2013

Key value for chemical safety assessment

Vapour pressure:

8.24 Pa

at the temperature of:

25 °C

Additional information

In a single key study, the vapour pressure of the test substance was determined according to the OECD Guideline 104, 23rd March 2006 and EU Method A.4.

The vapour pressure was measured in the temperature range of 82 °C to 119 °C. When the lowest pressure (400 Pa) was then set and the boiling section was heated by an electrical cartridge. At this time, the boiling temperature of the sample reached at 82 °C. When 3000 Pa was set the boiling section was heated by an electrical cartridge heater set up to 300 °C and equilibrium point of the sample was reached at 119°C.

The vapour pressure of the substance was 5.39 Pa at 20 °C (293 K), 8.24 Pa at 25 °C (298 K) and 56.36 Pa at 50 °C (323 K) (calculated by extrapolation of the measured vapour pressure curve). Reaction and/or decomposition of the test material was not observed during the test.