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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
1997-12-30 to 1998-04-30
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1998
Report date:
1998

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to guideline
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Remarks:
The testing facility indicated that the protocol was followed without deviation.
Qualifier:
according to guideline
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Remarks:
The testing facility indicated that the protocol was followed without deviation.
GLP compliance:
yes (incl. QA statement)
Remarks:
Certificate issued by the Swiss GLP monitoring authorities.
Type of method:
gas saturation method

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
426-540-0
EC Name:
-
Cas Number:
2973-59-3
Molecular formula:
C8 H7 Br O3
IUPAC Name:
2-bromo-5-hydroxy-4-methoxybenzaldehyde
Test material form:
solid
Specific details on test material used for the study:
- Batch: 00265786
- Purity: 91.3% (HPLC purity)
- Expiration date: July 1, 1998 (retest date)
- Storage: at room temperature at about 20°C

Results and discussion

Vapour pressureopen allclose all
Temp.:
40 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Mean vapour pressure of samples I and II
Temp.:
50 °C
Vapour pressure:
0.001 Pa
Remarks on result:
other: Mean vapour pressure of samples I and II
Temp.:
60 °C
Vapour pressure:
0.001 Pa
Remarks on result:
other: Mean vapour pressure of samples I and II
Temp.:
25 °C
Vapour pressure:
0 Pa
Remarks on result:
other: Extrapolated from linear regression plot of 1/T against ln(VP) at 40, 50 and 60°C
Temp.:
25 °C
Vapour pressure:
0.001 Pa
Remarks on result:
other: Based on the boiling temperature calculated using the Modified Watson Correlation

Any other information on results incl. tables

In the TENAX tubing recovery study, a recovery of 93.2% was found.

The recovery rates in the analysis of the fortified samples were approximately 100% showing that the trapping and extraction methods were suited to detect the presence of the test substance in the TENAX adsorber tubes.

Applicant's summary and conclusion

Conclusions:
The vapour pressure of the test substance was calculated using the gas saturation method at 40, 50 and 60°C for two samples of the test substance. The vapour pressures at those temperatures were determined to be 0.000425, 0.000626, and 0.000828 Pa, respectively. The natural logarithm of these values were plotted against the inverse temperature and the vapor pressure at 25°C was extrapolated, obtaining a value of 0.000238 Pa.