Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-09-14 - 2017-12-15
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study under GLP conditions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2018
Report Date:
2017

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
yes (incl. certificate)
Remarks:
2017-03-23
Type of method:
effusion method: vapour pressure balance

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Specific details on test material used for the study:
Main component: 2,2`-Dihydroxy-4-methoxybenzophenone
Molecular formula C14H12O4
Appearance: yellow powder
Batch: CM70314A1

Results and discussion

Vapour pressureopen allclose all
Temp.:
20 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Extrapolated
Temp.:
25 °C
Vapour pressure:
0 hPa
Remarks on result:
other: Extrapolated

Any other information on results incl. tables

Reference items

Dicamba: 1.57x10 -3 Pa at 25 °C

Tetradecane: 2.66 Pa at 25 °C

The vapour pressure measurements of the test item are summarised in the following table:

 

Test temperature

t(°C)

Test temperature

T(K)

1/T(K-1)

Experimental vapour pressure P(Pa)

Log P

(Pa)

50

323.15

3.095 x 10-3

7.411 x 10-3

-2.130

45

318.15

3.143 x 10-3

3.009 x 10-3

-2.522

55

328.15

3.047 x 10-3

1.716x 10-2

-1.766

60

333.15

3.002 x 10-3

3.132x 10-2

-1.504

log P = - 7250.0283/T + 20.2895

Applicant's summary and conclusion

Conclusions:
Based on an extrapolation from vapour pressure measured above 50 °C, the test item has a VP of 3.6x10-7 hPa at 20 °C and 9.4x10-7 hPa at 25 °C.
Executive summary:

Based on an extrapolation from vapour pressure measured above 50 °C, 2,2'-Dihydroxy-4 -methoxybenzophenone has a VP of 3.6x10-7 hPa at 20 °C and 9.4x10-7 hPa at 25 °C.