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Physical & Chemical properties

Vapour pressure

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
February - May 1988
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes
Type of method:
static method
Specific details on test material used for the study:
- Commercial name/code: P0071
- Chemical name: Metaldehyde
- Appearance: White solid
- Solubility water: 0.2 g/1 (22°C); chloroform: 1.5 g/1 (26°C)
- Storage: at room temperature in the dark
- Stability: sensitive to heat above 60°C
Key result
Test no.:
#1
Temp.:
24.11 °C
Vapour pressure:
5.92 Pa
Key result
Test no.:
#2
Temp.:
30.87 °C
Vapour pressure:
10.8 Pa
Key result
Test no.:
#3
Temp.:
37.94 °C
Vapour pressure:
16.95 Pa
Key result
Test no.:
#4
Temp.:
19.89 °C
Vapour pressure:
4.44 Pa
Remarks on result:
not measured/tested
Remarks on result:
not measured/tested

A vapour pressure of 6.6 ± 0.3 Pa at 25°C was obtained by extrapolation of the different measurements.

Conclusions:
A vapour pressure of 6.6 ± 0.3 Pa at 25°C was obtained.
Executive summary:

The vapour pressure of a sample of P0071 was determined in accordance with OECD-method 104. Using the static technique, a vapour pressure of 6.6 ± 0.3 Pa at 25°C was obtained. A continuous decline of the vapour pressure in time was observed during the measurements. Hence, the vapour pressure of P0071 was derived by extrapolating the curve of the natural logarithm of the measured vapour pressure (at each of the four temperatures of measurement) versus time, to the first measurement.

Description of key information

The vapour pressure of a sample of P0071 was determined in accordance with OECD-method 104. Using the static technique, a vapour pressure of 6.6 ± 0.3 Pa at 25°C was obtained. A continuous decline of the vapour pressure in time was observed during the measurements. Hence, the vapour pressure of P0071 was derived by extrapolating the curve of the natural logarithm of the measured vapour pressure (at each of the four temperatures of measurement) versus time, to the first measurement.

Key value for chemical safety assessment

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

Additional information

Source: GLP-report