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Physical & Chemical properties

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:
guideline study with acceptable restrictions
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
yes
Remarks:
; limited reporting
GLP compliance:
no
Type of method:
dynamic method
Key result
Temp.:
25 °C
Vapour pressure:
1.422 Pa
Key result
Temp.:
20 °C
Vapour pressure:
0.965 Pa

Vapour pressure of bis(isopropyl)naphthalene (diisopropylnaphthalene, DIPN - mixture of isomers)

 

Temperature [°C]

90

134

149

166

175

190

211

Vapour pressure [hPa]

1

5

10

20

30

50

100

 

Linear regression equation:  log p = -2945.0141 (1/T) + 10.0306

 

Vapour pressure of bis(isopropyl)naphthalene:

 

Temperature [°C]

20

25

30

Vapour pressure [Pa]

0.965

1.422

2.070

 

Conclusions:
The vapour pressure of bis(isopropyl)naphthalene (diisopropylnaphthalene - DIPN) was determined using a method similar to OECD TG 104. From the regression line of log p over 1/T, the vapour pressure at 25°C was calculated to be 1.422 Pa.

Description of key information

The vapour pressure of bis(isopropyl)naphthalene 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:
1.422 Pa
at the temperature of:
25 °C

Additional information