Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Non-GLP study conducted to a well described method on a sample of known purity within the defined technical grade.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1980
Report date:
1980

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
not specified
GLP compliance:
no
Type of method:
dynamic method

Test material

Constituent 1
Chemical structure
Reference substance name:
2,3,5,6-tetrachloropyridine
EC Number:
219-283-9
EC Name:
2,3,5,6-tetrachloropyridine
Cas Number:
2402-79-1
Molecular formula:
C5HCl4N
IUPAC Name:
2,3,5,6-tetrachloropyridine
Details on test material:
Purity = 99.67%

Results and discussion

Vapour pressure
Temp.:
25 °C
Vapour pressure:
3 Pa
Remarks on result:
other: Calculated from experimental data using the Antoine equation.
Transition / decomposition
Transition / decomposition:
no

Any other information on results incl. tables

The Antoine equation was ussed to calculate vapour pressure as follows:

log P (mm Hg) = A - B / (T+C)

where A = 7.08292, B = 1833.25 and C = 185.000 (determined experimentally)

when T = 25 P = 0.022 mm Hg

Using a conversion factor of 133.3 gives P = 3.00 Pa at 25 deg C

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the substance has been determined to be 3 Pa at 25 deg C.
Executive summary:

Vapour pressures were determined experimentally by a dynamic method equivalent to OECD Guidleline 104 in a twin ebulliometer using diphenyl oxide as a reference substance. Vapour pressures were measured from 8 to 750 mm Hg. Using the Antoine equation the vapour pressure of the substance at 25 deg C was determined to be 3 Pa.