Ledum palustre, ext.

Vapour pressure

Link to relevant study record(s)

Reference

Reference 1

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.

Reference 2

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)

Additional information

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