Alcohols, C16-18 and C18-unsatd., ethoxylated

Vapour pressure

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

vapour pressure

Type of information:

calculation (if not (Q)SAR)

Adequacy of study:

key study

Study period:

2010-03-29 to 2010-04-19

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

accepted calculation method

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Principles of method if other than guideline:

The practical test performance was based on the in-house test procedure VTA(S)31X07001.01: "Determination of the vapour pressure curve of solid and liquid substances by means of DSC".
Due to the fact that the experimental result was not in the recommended range, a calculation according the Grain-Watson-method was done.

GLP compliance:

no

Type of method:

other: Grain-Watson calculation

Temp.:

20 °C

Vapour pressure:

0.005 Pa

Remarks on result:

other: estimated according the Grain-Watson-Method

The experimental determined vapour pressure of the test item at 20 °C of 1.3*10 ^-5 mbar is not in the recommended range of 1 to 1000 mbar for DSC measurements.

Therefore an estimation procedure in accordance with the test method OECD Guideline 104 "OECD Guideline For The Testing Of Chemicals, adopted by the Council on 23 March 2006, Vapour Pressure" ANNES Estimatio Method newest version (Robert S. Boethling, Donald Mackay, Handbook of Property Estimation Methods for Chemcials, Lewis Publishers, year of publication 2000, Cap. 3 - Vapour Pressure, Grain-Watson Method, p. 53 - 65) was used. This method is applied for vapour pressures between 10³ to 10 ^-7 mbar.

The test item has a vapour pressure of 5.8*10 ^-3 Pa (5.8*10 ^-5 mbar) at 20 °C according to the definition in the OECD Guideline 104 (Grain-Watson estimation).

Reference 2

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

2012-01-18

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Study performed in accordance with approved internal laboratory method, basic data given.

Qualifier:

according to guideline

Guideline:

other: Test Method NFT 20-048

GLP compliance:

no

Type of method:

static method

Remarks:

applicable within range 1E-01 to 1E+05 Pa

Temp.:

20 °C

Vapour pressure:

< 5 Pa

Temp.:

50 °C

Vapour pressure:

< 5 Pa

Results of two measurements at each temperature. The value < 5 Pa reported for all single measurements.

Description of key information

≤ 0.0055 Pa at 20 °C (Grain-Watson calculation, OECD 104)

Additional information

Experimental determination employing static method resulted in an estimation of < 5 Pa at 20 °C and 50 °C.