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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:
To 17 SEPTEMBER 2018 to 17 OCTOBER 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
effusion method: Knudsen cell
Key result
Test no.:
#3
Temp.:
ca. 150 °C
Vapour pressure:
ca. 0.017 Pa
Key result
Test no.:
#2
Temp.:
ca. 135 °C
Vapour pressure:
ca. 0.003 Pa
Key result
Test no.:
#1
Temp.:
ca. 120 °C
Vapour pressure:
ca. 0.001 Pa
Conclusions:
For the test item 1-butyl-5-[(4-chlorophenyl)azo]-1,2-dihydro-6-hydroxy-4-methyl-2-
oxonicotinonitrile, the following vapour pressures at 20°C and at 25°C were calculated from
the regression equation:
Table 10.1-b Results Test Item
Vapour pressure at 20°C: 7.02 * 10-10 Pa
Vapour pressure at 25°C: 1.76 * 10-09 Pa
The linear regression of log p vs. 1/T gave a correlation coefficient r of - 0.9936, showing
good repeatability and precision. Therefore, the determination is considered as valid.

Description of key information

According to OECD 104 resp. A.4 using the effusion method: Knudsen Cell.

Key value for chemical safety assessment

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

Additional information








Vapour pressure at 20 °C:
Vapour pressure at 25 °C:
7.02 * 10-10Pa
1.76 * 10-9
Pa