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Physical & Chemical properties

Vapour pressure

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Administrative data

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
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:
dynamic method
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
21.4 hPa
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
28.8 hPa
Key result
Test no.:
#3
Temp.:
50 °C
Vapour pressure:
109.6 hPa

Table1:Measured vapour pressures and corresponding temperatures

Temperature / °C

Vapour pressure / hPa

35.1

50.0

41.2

70.0

48.1

100.0

56.3

150.0

62.6

200.0

71.6

300.0

83.9

500.0

92.6

700.0

99.5

900.0

78.4

400.0

52.5

125.0

Table2: Antoine parameters and extrapolated vapour pressures

T / °C

p / hPa

log (p/hPa) = A + B/(C+T[°C])

20

21.4

A =

8.96614

25

28.8

B =

-2238.19

50

109.6

C =

273.15

Conclusions:
The vapour pressure of the test item was 21.4 hPa at 20°C, 28.8 hPa at 25°C and 109.6 hPa at 50°C.
Executive summary:

Nau (2017) is a GLP-compliant study following EU method A.4. and OECD guideline 104, dynamic method. Vapour pressure was measured in the temperature range 35 – 100°C and vapour pressures at 20, 25 and 50°C were extrapolated from the measured data. The study is considered to be reliable without restrictions (Klimisch 1). The vapour pressure of the test item was 21.4 hPa at 20°C, 28.8 hPa at 25°C and 109.6 hPa at 50°C.

 

Description of key information

The vapour pressure of the rhodium trisulphate (solution) was 21.4 hPa at 20°C, 28.8 hPa at 25°C and 109.6 hPa at 50°C.

Key value for chemical safety assessment

Vapour pressure:
21.4 hPa
at the temperature of:
20 °C

Additional information

For rhodium trisulfate (solution), Nau (2017) is a GLP-compliant study following EU method A.4. and OECD guideline 104, dynamic method. Vapour pressure was measured in the temperature range 35 – 100°C and vapour pressures at 20, 25 and 50°C were extrapolated from the measured data. The study is considered to be reliable without restrictions (Klimisch 1). The vapour pressure of the test item was 21.4 hPa at 20°C, 28.8 hPa at 25°C and 109.6 hPa at 50°C.