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Diss Factsheets

Physical & Chemical properties

Vapour pressure

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Endpoint:
vapour pressure
Type of information:
other: bibliography
Adequacy of study:
weight of evidence
Study period:
2012
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Justification for type of information:
as a UVCB and natural complex substance, it is considered a constituents approach. This mother tincture contains about 65% (v/v) of ethanol.
Qualifier:
no guideline available
Principles of method if other than guideline:
method not described in HSDB sheet but source is [Daubert, T.E., R.P. Danner. Physical and Thermodynamic Properties of Pure Chemicals Data Compilation. Washington, D.C.: Taylor and Francis, 1989.] **PEER REVIEWED**
GLP compliance:
not specified
Key result
Temp.:
25 °C
Vapour pressure:
59.3 mm Hg
Conclusions:
The vapor pressure of ethanol is 59.3 mm Hg at 25 deg C /Extrapolated/ [Daubert, T.E., R.P. Danner. Physical and Thermodynamic Properties of Pure Chemicals Data Compilation. Washington, D.C.: Taylor and Francis, 1989.] **PEER REVIEWED**
59.3 mm Hg at 25°C is equivalent to 7.91 kPa at 25°C.
Endpoint:
vapour pressure
Type of information:
other: bibliography
Adequacy of study:
weight of evidence
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
data from handbook or collection of data
Justification for type of information:
Ledum palustre mother tincture is a UVCB and natural complex substance, and is assesed through constituents approach taking into account one the main constituent : water present typically at 33% (v/v).
Qualifier:
no guideline available
Principles of method if other than guideline:
principles of method are not described in the HSDB but is **PEER REVIEWED** data.
GLP compliance:
not specified
Key result
Test no.:
#1
Temp.:
25 °C
Vapour pressure:
3.169 kPa
Remarks on result:
other: source HSDB
Key result
Test no.:
#2
Temp.:
100 °C
Vapour pressure:
760 mm Hg
Remarks on result:
other: source HSDB ([Lewis, R.J. Sr. (ed) Sax's Dangerous Properties of Industrial Materials. 11th Edition. Wiley-Interscience, Wiley & Sons, Inc. Hoboken, NJ. 2004., p. V3: 3692] **PEER REVIEWED** )
Key result
Test no.:
#3
Temp.:
273.16 K
Vapour pressure:
611.657 Pa
Remarks on result:
other: source HSDB ([Haynes, W.M. (ed.). CRC Handbook of Chemistry and Physics. 94th Edition. CRC Press LLC, Boca Raton: FL 2013-2014, p. 6-13] **PEER REVIEWED** )
Conclusions:
The vapour pressure of water is 3.169 kPa at 25°C.

Description of key information

According to data available, vapour pressure of the 2 main constituents reprensenting 98.5% of the Ledum palustre mother tincture is as follows :

- water VP          ca 3,169 kPa (at 25°C) and

- ethanol, VP       ca 7.91 kPa (at 25 °C)

Key value for chemical safety assessment

Additional information

The registered substance has a vapor pressure between 3.169 kPa and 7.91 kPa at 25°C.