Registration Dossier

Diss Factsheets

Physical & Chemical properties

Vapour pressure

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
17 Jun - 5 Sep 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
yes (incl. QA statement)
Remarks:
Ministerie van Volksgezondheid, Welzijn en Sport, Den Haag
Type of method:
effusion method: by loss of weight or by trapping vaporisate
Key result
Temp.:
20 °C
Vapour pressure:
4.9 Pa
Temp.:
25 °C
Vapour pressure:
8.5 Pa

Results of the isothermal TGA analysis:

Temperature [°C]

Weight loss [µg/min]

vT[mg/cm2/h]

log vT

log P

P [Pa]

40

20.88

2.49

-2.60

1.58

38

20.02

2.39

-2.62

1.56

36

50

53.17

6.35

-2.20

2.00

100

52.85

6.31

-2.20

2.00

100

60

121.1

1.45

-1.84

2.38

240

117.9

1.41

-1.85

2.37

230

70

253.6

3.03

-1.52

2.72

520

241.7

2.89

-1.54

2.70

500

On the basis of these results in the temperature range 30 °C - 70 °C, the following equation was obtained:

log P = -4078 * 1/T + 14.60 (r = 0.9992, n = 8, T in [K], P in [Pa])

Extrapolation to temperatures 20 °C and 25 °C gives log P values of 4.9 and 8.5, respectively, and values of P in [Pa] as given above.

Description of key information

4.9 Pa at 20 °C

8.5 Pa at 25 °C

Key value for chemical safety assessment

Vapour pressure:
4.9 Pa
at the temperature of:
20 °C

Additional information

The vapour pressure of the substance was determined using isothermal TGA effusion method according to EU method A.4 and guidelines OECD 104 and OPPTS 830.7950.

Categories Display