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Physical & Chemical properties

Vapour pressure

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vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
OECD Guideline 104 (Vapour Pressure Curve)
- It was used in the lowest vapour pressure range the thermobalance method instead of the gas saturation method.
GLP compliance:
Type of method:
effusion method: vapour pressure balance
thermogravimetry analysis
25 °C
Vapour pressure:
<= 0 Pa
Remarks on result:
other: extrapolated
Transition / decomposition:
melting point
Transition temp.:
114.8 °C
Vapour pressure at 10°C above transition temperature:
0.21 Pa
Vapour pressure at 20°C above transition temperature:
0.44 Pa
Transition / decomposition:
Transition temp.:
> 275 °C
Temperature (°C) Vapour pressure extrapolated (Pa)
25 ≤ 6.0x10-7
20 ≤ 2.5x10-7
94.8 ≤ 1.1x10-2
104.8 ≤ 3.4x10-2
114.8 ≤ 9.8x10-2
124.8 ≤ 2.1x10-1
134.8 ≤ 4.4x10-1

T'A (11 Pa): 185 °C (measured)

ΔHV (heat of evaporation): ≥ 99.4 kJ/mol

ΔHF (heat of fusion): 29.1 kJ/mol (DSC)

ΔHS (heat of sublimation): ≥ 128.9 kJ/mol

FP (melting point): 114.8 °C (DSC)

* Evaluation of vapour pressure using 2nd scan only.

Only upper limits of vapour pressure could be given in this report, because of decomposition of the sample during the thermal treatment.

Thermogravimetric analysis:

Temperature in°C Weight loss in % weight
25 - 200 <0.1
225 0.2
250 1.6
275 6.6
300 24.8
325 70.0
350 96.8
375 98.4
400 99.2

Experimental conditions:

Intrument: Thermobalance Perkin-Elmer TGS-1

Sample pan: Aluminium; Sample weight:1.64 mg; Atmosphere: N2 (high purified = 99.999 %) gas flow 30 cm3/min; Heating rate: 20 °C/min;

Temperature calibration: Magnetic standards: Alumel and Nickel

The vapour pressure of test substance was extrapolated to be ≤0.0000006 Pa at 25°C
Executive summary:

In this guideline (OECD 104) study the vapour pressure of the test material (EC 404-360-3) was determined to be ≤0.0000006 Pa at 25°C

Description of key information

Study conducted to recognised testing guideline.

Key value for chemical safety assessment

Vapour pressure:
0 Pa
at the temperature of:
25 °C

Additional information

The vapour pressure was determined by Thermogravimetry (Diffusion controlled evaporation)

≤0.0000006 Pa at 25°C  (extrapolated)