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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
Study period:
07 May 2012 to 06 July 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Study performed in accordance with OECD, EU & US EPA test guidance in compliance with GLP.
Reason / purpose for cross-reference:
reference to same study
Reason / purpose for cross-reference:
reference to other study
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
GLP compliance:
yes
Type of method:
other: isothermal TGA effusion method
Temp.:
20 °C
Vapour pressure:
< 1.3 Pa
Temp.:
20 °C
Vapour pressure:
< 1 mm Hg
Temp.:
25 °C
Vapour pressure:
< 1.6 Pa
Temp.:
25 °C
Vapour pressure:
< 1.2 mm Hg

Results of the isothermal TGA analysis

Temperature [°C]

Weight loss [μg/min]

VT[g/cm2/h]

Log VT

Log PT

PT[Pa]

170

6.786

8.10 x 10-4

-3.09

0.94

8.7

 

6.673

7.97 x 10-4

-3.10

0.93

8.6

180

16.38

1.96 x 10-3

-2.71

1.38

2.4 x 101

 

16.44

1.96 x 10-3

-2.71

1.38

2.4 x 101

190

38.48

4.59 x 10-3

-2.34

1.80

6.4 x 101

 

37.96

4.53 x 10-3

-2.34

1.80

6.3 x 101

200

83.57

9.98 x 10-3

-2.00

2.199

1.5 x 102

 

82.20

9.81 x 10-3

-2.01

2.18

1.5 x 102

 

Vapour pressure of the test substance

Temperature [°C]

Log PT

PT[Pa]

PT[mm Hg]

20

-9.13

7.4 x 10-10

5.5 x 10-12

25

-8.63

2.3 x 10-9

1.7 x 10-11

Conclusions:
The vapour pressure of the test substance was:
< 1.3 x 10-8 Pa at 20°C (293K)
< 1.0 x 10-10 mm Hg at 20°C (293K)
< 1.6 x 10-8 Pa at 25°C (298K)
< 1.2 x 10-10 mm Hg at 25°C (298K)
Executive summary:

Study performed in accordance with European Community (EC), EC no. 761/2009, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.4: “Vapour Pressure", OECD Guidelines for the Testing of Chemicals no.104: "Vapour Pressure", United States Environmental Protection Agency (EPA), Product Properties Test Guidelines no. OPPTS 830.7950: "Vapor pressure", August 1996 and in compliance with the Principles of Good Laboratory Practice (GLP).

 

The isothermal TGA effusion method was applied for the determination of the vapour pressure of 6,6’-di-tert-butyl-4,4’-butylidenedi-m-cresol.

 

The vapour pressure of the test substance was:

< 1.3 x 10-8 Pa at 20°C (293K)

< 1.0 x 10-10 mm Hg at 20°C (293K)

< 1.6 x 10-8 Pa at 25°C (298K)

< 1.2 x 10-10 mm Hg at 25°C (298K)

Description of key information

Key value determined using experimental methods defined within OECD, EU & US EPA test guidance.

The vapour pressure of the test substance was:

< 1.3 x 10-8 Pa at 20°C (293K)

< 1.0 x 10-10 mm Hg at 20°C (293K)

< 1.6 x 10-8 Pa at 25°C (298K)

< 1.2 x 10-10 mm Hg at 25°C (298K)

Key value for chemical safety assessment

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

Additional information