7-methyl-3-methyleneocta-1,6-diene

Vapour pressure

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

weight of evidence

Study period:

1999

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

secondary literature

Remarks:

Documentation insufficient for assessment: no certificate of analysis of the test substance; test performed at one temperature only; individual analytical determinations not reported

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

Stripping method which involved stripping a solute from a nonsaturated aqueous solution by an air stream. This experiment gives a value gamma P from which vapor pressure can be deduced. the vapor pressure is determined by combining two independant experiments. Knowledge of gamma P and solubility S allows the calculation of vapor pressure using the following equation :
P= alphaVPTS/G where G is the molar output aeration rate and V the volume of liquid in the reactor.

GLP compliance:

not specified

Type of method:

dynamic method

Key result

Temp.:

25 °C

Vapour pressure:

251 Pa

Remarks on result:

other: ± 35 Pa

Literature data:

- Experimental value: 253 Pa at 24 °C (Simon et al., 1995)

- Estimated value (ACD/PVAP Web Service V.2.6, 1995): 305 Pa

Conclusions:

The vapour pressure of myrcene at 25°C was determined to be 251 ± 35 Pa.

Executive summary:

A study was conducted to determine the vapor pressure of myrcene using stripping method.

 

The vapour pressure of myrcene at 25°C was determined to be 251 ± 35 Pa.

Reference 2

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

data from handbook or collection of data

Remarks:

The information does not come from a test report and the minimum fields required cannot be filled in.

Reason / purpose for cross-reference:

reference to same study

Reason / purpose for cross-reference:

reference to other study

Principles of method if other than guideline:

Method followed unknown, data from handbook.

GLP compliance:

not specified

Type of method:

other: no data

Key result

Temp.:

25 °C

Vapour pressure:

267.98 Pa

Remarks on result:

other: experimental result

None

Conclusions:

The reported vapour pressure of myrcene, experimentaly measured, is 267.98 Pa at 25°C.

Executive summary:

The vapour pressure of myrcene, reported from Perry’s Chemical Handbook. Physical and Chemical Data, 6^thEdition, is 267.98 Pa at 25°C.

Description of key information

The vapour pressure of MYRCENE (experimental value) was determined to be 251 +/- 35 Pa  at 25°C.

Key value for chemical safety assessment

Vapour pressure:

251 Pa

at the temperature of:

25 °C

Additional information

The experimental value of the vapour pressure available for the registered substance (literature data) is supported by the secondary litterature data given in an Handbook. Therefore this value is proposed as key value in a Weight of Evidence approach.