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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
14.03.2019 - 22.03.2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2019
Report date:
2019

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
2006
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Qualifier:
according to guideline
Guideline:
other: OECD Test Guideline 113 (1981) Thermal Stability
GLP compliance:
no
Type of method:
effusion method: Knudsen cell

Test material

Constituent 1
Chemical structure
Reference substance name:
2,3,5-trimethylhydroquinone
EC Number:
211-838-3
EC Name:
2,3,5-trimethylhydroquinone
Cas Number:
700-13-0
Molecular formula:
C9H12O2
IUPAC Name:
2,3,5-trimethylhydroquinone
Test material form:
solid: particulate/powder

Results and discussion

Vapour pressureopen allclose all
Key result
Test no.:
#1
Temp.:
20 °C
Vapour pressure:
0 Pa
Key result
Test no.:
#2
Temp.:
25 °C
Vapour pressure:
0.001 Pa
Key result
Test no.:
#3
Temp.:
50 °C
Vapour pressure:
0.017 Pa

Any other information on results incl. tables

Effusion method: Knudsen cell

The vapour pressure was measured in the temperature range of 40.6 °C to 70.9 °C. The measured vapour pressure values together with the measured temperatures are listed:

No.

Temperature / °C

Vapour pressure / Pa

1

40.6

5.9 × 10-3

2

45.7

1.1 × 10-2

3

50.7

1.8 × 10-2

4

55.8

3.2 × 10-2

5

60.8

5.6 × 10-2

6

65.9

9.3 × 10-2

7

70.9

1.6 × 10-1

From the measured data points of the vapour pressure curve the constants A and B of the Antoine equation can be derived by regression of the data points to

A = 13.9037

B = -5061.92

C = 273.15.

The vapour pressure of the test item 2,3,5-Trimethylhydroquinone calculated for the temperatures 20, 25 and 50°C by interpolation and extrapolation of the measured vapour pressure curve, according to Regulation EC No. 440/2008 Method A.4.Vapour Pressure and OECD Test Guideline 104 (2006) is shown in the Table:

Temperature / °C

Vapour pressure / Pa

20

4.3 × 10-4

25

8.4 × 10-4

50

1.7 × 10-2

Applicant's summary and conclusion

Conclusions:
The vapour pressure of trimethylhydroquinone at 20°C, 25°C and 50°C is 0,43 mPa, 0,84 mPa and 17 mPa, respectively.
Executive summary:

The vapour pressure of the test item 2,3,5-Trimethylhydroquinone was calculated for the temperatures 20, 25 and 50°C by interpolation and extrapolation of the measured vapour pressure curve, according to Regulation EC No. 440/2008 Method A.4.Vapour Pressure and OECD Test Guideline 104 (2006).

Temperature / °C

Vapour pressure / Pa

20

4.3 × 10-4

25

8.4 × 10-4

50

1.7 × 10-2