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Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Unknown
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Justification for type of information:
1. HYPOTHESIS FOR THE ANALOGUE APPROACH
The dossier substance is composed mainly of water (66.7-95.3%), therefore the physical-chemical properties are likely to be those of water.

2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
The source chemical is pure water. The target substance consists of 66.7-95.3% water. For the remaining composition of the target substance, see the composition section (1.2).

3. ANALOGUE APPROACH JUSTIFICATION
The target substance consists of distillates from heating the leaves of a natural plant, Nicotiana tabacum, solanaceae. The target substance consists of the compounds released during the heating to release moisture. The target substance consists of the organic compounds in the leaves and water. As the substance consists mostly of water, use of water data is justified as representing the major influence on the density of the substance.

Data source

Reference
Reference Type:
review article or handbook
Title:
Illustrated Handbook of Physical-Chemical Properties and Environmental Fate for Organic Chemicals, volume III of Volatile Organic Chemicals
Author:
Mackay, D., W. Y. Shiu, and K. C. Ma.
Year:
1993
Bibliographic source:
Lewis Publishers, Boca Raton

Materials and methods

Principles of method if other than guideline:
Data comes from a well respected handbook of chemical data. The method used to obtain the data is not know.
Type of method:
other: The data comes from a handbook, the method was not given.

Test material

Constituent 1
Chemical structure
Reference substance name:
Water
EC Number:
231-791-2
EC Name:
Water
Cas Number:
7732-18-5
Molecular formula:
H2O
IUPAC Name:
water
Test material form:
liquid

Results and discussion

Vapour pressure
Key result
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
15 Torr

Applicant's summary and conclusion

Conclusions:
The vapor pressure of water is 15 torr at room temperature.
Executive summary:

The vapor pressure of water is 15 torr at room temperature.