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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-12-03 to 2019-03-28
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The study was conducted according to an internationally recognised method, and under GLP. The substance is considered to be adequately characterised. Therefore full validation applies.
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry
Key result
Temp.:
20 °C
Vapour pressure:
0 Pa

Table: Test item vapour pressure test results

T (K)

Δm (mg)

Duration time (min)

t (h)

Sample coated area F (cm2)

Evaporation rate VT (g.cm-2.h-1)

Log VT

Log PT

Vapour pressure PT (Pa)

1/T

397

0.2074

100

1.667

0.332

3.75E-4

-3.426

0.811

6.467

2.52E-3

401

0.2667

100

1.667

0.332

4.82E-4

-3.317

0.919

8.291

2.49E-3

405

0.3611

100

1.667

0.332

6.53E-4

-3.185

1.049

11.19

2.47E-3

409

0.4827

100

1.667

0.332

8.73E-4

-3.059

1.173

14.9

2.44E-3

413

0.6353

100

1.667

0.332

1.15E-3

-2.940

1.291

19.55

2.42E-3

417

0.8479

100

1.667

0.332

1.53E-3

-2.814

1.415

26.00

2.40E-3

The linear regression of logPT=f(1/T) of test item

LogPT=-5040.8269/T+13.4984 (R2=0.9992)

PT (20.0°C)

1.97E-4 Pa

Conclusions:
Vapour pressure of test item was measured according to OECD 104 guideline using the thermogravimetric method.
The vapour pressure of test item was calculated as 1.97E-4 Pa at 20°C (extrapolation from linear regression).
Executive summary:

Vapour pressure of test item was measured according to OECD 104 guideline using the thermogravimetric method.

The vapour pressure of test item was calculated as 1.97E-4 Pa at 20°C (extrapolation from linear regression).

Description of key information

The vapour pressure of test item was calculated as 1.97E-4 Pa et 20°C (extrapolation from linear regression) using the thermogravimetric method.

Key value for chemical safety assessment

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

Additional information

A data measuring according to OECD 104 guideline and under GLP is available.

It is considered as a key study, and the result is retained as key data.

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