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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
06 Aug - 07 Aug 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2015
Report date:
2015

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
GLP compliance:
no
Type of method:
effusion method: vapour pressure balance

Test material

Constituent 1
Chemical structure
Reference substance name:
4-(2-phenylpropan-2-yl)phenyl 4-oxo-3-(λ⁵-diazynylidene)-3,4-dihydronaphthalene-1-sulfonate
Cas Number:
23121-00-8
Molecular formula:
C25H20N2O4S
IUPAC Name:
4-(2-phenylpropan-2-yl)phenyl 4-oxo-3-(λ⁵-diazynylidene)-3,4-dihydronaphthalene-1-sulfonate
Test material form:
solid
Specific details on test material used for the study:
Storage conditions: Ambient temperature (10 to 30 °C), protected from light

Results and discussion

Vapour pressureopen allclose all
Temp.:
20 °C
Vapour pressure:
0 hPa
Temp.:
25 °C
Vapour pressure:
0 hPa
Temp.:
50 °C
Vapour pressure:
0 hPa

Any other information on results incl. tables

Results
Table 1 – Measured vapour pressure values

Temperature [°C]

Vapour pressure [hPa]

75

2.3E-05

80

9.3E-06

85

1.2E-05

90

2.4E-05

95

4.6E-05

100

1.1E-04

 

The data point measured at 75 °C was not included in the linear regression because it shows a typical deviation caused by volatile impurities at the beginning of a measurement. The data point at 80 °C was below the detection limit (1E-05 hPa) and was thus not included in the linear regression.

The values for 20, 25 and 50 °C were calculated using the Antoine constants shown in Table 2.

Table 2 – Antoine parameters and extrapolated vapour pressures

T [°C]

p [hPa]

log p = A + B/(C+T)

20

6.9E-11

A = 18.61464

25

2.1E-10

B = -8436.54

50

3.2E-08

C = 273.15

Applicant's summary and conclusion