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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
May 15 and 16, 2019
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
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: Knudsen cell
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0 Pa
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0 Pa

Temperature, °C Δm/Δt, mg/min × 10-5 Vapour pressure, Pa × 10 -2
60.7 2.6154 0.40270
65.7 2.7935 0.43334
70.8 4.8225 0.75367
75.0 6.7229 1.0571
80.0 7.3809 1.1689
85.0 8.8448 1.4106

Regression data of the vapour regression curve:

intercept: 6.4250

slope: -2950.3595

R squared 0.9441

Conclusions:
Vapour pressure at 20 °C is 0.0002294 Pa.
Vapour pressure at 25 °C is 0.0003384 Pa.
Executive summary:

Method

Effusion method: Knudsen cell as described in OECD 104.

Results

Vapour pressure at 20 °C is 0.0002294 Pa.

Vapour pressure at 25 °C is 0.0003384 Pa.

Description of key information

Vapour pressure at 20 °C is 0.0002294 Pa.

Vapour pressure at 25 °C is 0.0003384 Pa.

Key value for chemical safety assessment

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

Additional information

Effusion method: Kudsen cell - OECD guideline 104.