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Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Method similar to OECD 104; limited reporting
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
yes
Remarks:
; limited reporting
GLP compliance:
no
Type of method:
dynamic method
Temp.:
20 °C
Vapour pressure:
1.59
Remarks on result:
other: extrapolated from Vp-curve, plot logp vs. (1/T)
Temp.:
25 °C
Vapour pressure:
2.429 Pa
Remarks on result:
other: extrapolated from Vp-curve, plot logp vs. (1/T)

Vapour pressure of isopropylnaphthalene (monoisopropylnaphthalene, MIPN - mixture of isomers)

 

Temperature[°C]

79

105

123

135

145

159

178

Vapour pressure[hPa]

1

5

10

20

30

50

100

 

Linear regression equation:       log p = -3,194.3508 (1/T) + 11.0994

 

Vapour pressure of isopropylnaphthalene:

 

Temperature [°C]

20

25

30

Vapour pressure [Pa]

1.5949

2.4293

3.6491

Conclusions:
The vapour pressure of monoisopropylnaphthalene - MIPN) was determined using a method similar to OECD TG 104. From the regression line of log p versus (1/T) (in Kelvin), the vapour pressure at 20°C and 25°C was calculated to be 1.6 and 2.5 Pa, respectively.

Description of key information

The vapour pressure of isopropylnaphthalene was determined based on OECD TG 104 (dynamic method). The regression equation of the plot log p versus 1/T was used to calculate the vapour pressure at ambient temperatures.

Key value for chemical safety assessment

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

Additional information

Vapour pressure of isopropylnaphthalene was determined to be 2.429 Pa using a method similar to OECD TG 104 (RÜTGERS 2010). This value is in good agreement with a value reported in the literature (4.9 Pa, Perry RH, Green DW 1984).