2-benzylheptanol

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2015-10-26 to 2015-10-30

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

2006

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: OECD Test Guideline 113: Screening Test for Thermal Stability and Stability in Air

Version / remarks:

1981

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: EPA OCSPP Test Guideline 830.7950: Vapor Pressure

Version / remarks:

1996

Deviations:

no

GLP compliance:

no

Remarks:

The study was conducted under supervision of a quality assurance unit which had ensured e.g instrumentation validation, reagent/materials certification, analyst certification and providing standard operating procedures.

Type of method:

dynamic method

Remarks:

Vapour–liquid equilibrium (VLE)

Key result

Temp.:

20 °C

Vapour pressure:

0.07 hPa

Key result

Temp.:

25 °C

Vapour pressure:

0.1 hPa

Key result

Temp.:

50 °C

Vapour pressure:

0.38 hPa

Test no.:

#1

Temp.:

134.8 °C

Vapour pressure:

12.4 hPa

Test no.:

#2

Temp.:

157.2 °C

Vapour pressure:

21.8 hPa

Test no.:

#3

Temp.:

173.5 °C

Vapour pressure:

34 hPa

Test no.:

#4

Temp.:

181.5 °C

Vapour pressure:

42.5 hPa

Test no.:

#5

Temp.:

185.2 °C

Vapour pressure:

49.5 hPa

Test no.:

#6

Temp.:

192.5 °C

Vapour pressure:

62.1 hPa

Test no.:

#7

Temp.:

189.5 °C

Vapour pressure:

56 hPa

Test no.:

#8

Temp.:

181.9 °C

Vapour pressure:

47 hPa

Test no.:

#9

Temp.:

162 °C

Vapour pressure:

28 hPa

Thermal Stability

The test item in a closed glass crucible showed no thermal effects in the temperature range of 25 – 300 °C.

 

Dynamic method: Vapour-liquid equilibrium (VLE)

The vapour pressure was measured in the temperature range of 134.8 to 192.5 °C.

From the measured data points of the vapour pressure curve the constants A. B and C of the Antoine equation was derived by regression (Microsoft Excel) of the data points to

 

A = 8.6890

B = -2295.67

C = 273.15.

 

The vapour pressure of the test item was calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C. according to Regulation EC 440/2008 Method A.4.

 

Conclusions:

The vapour pressure of the test item was determined to be 0.07 Pa at 20 °C, 0.10 Pa at 25 °C and 0.38 Pa at 50 °C respectively.

Executive summary:

A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. A vapour pressure curve with 9 data points was measured over a pressure range between 12 to 62 hPa. For control 3 measuring points were evaluated with decreasing pressure. The vapour pressure was measured in the temperature range of 25 to 900 °C. From the measured data points of the vapour pressure curve the constants A, B and C of the Antoine equation was derived and the vapour pressure of the test item as calculated by extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. The vapour pressure of the test item was determined to be 0.07 Pa at 20 °C, 0.10 Pa at 25 °C and 0.38 Pa at 50 °C respectively. No observations were made which cause doubt on the validity of the outcome of the study.

Description of key information

The vapour pressure of the test item was determined to be 0.07 Pa at 20 °C, 0.10 Pa at 25 °C and 0.38 Pa at 50 °C respectively.

Key value for chemical safety assessment

Vapour pressure:

0.07 hPa

at the temperature of:

20 °C

Additional information

A study was conducted according to OECD TG 104, Regulation (EC) No 440/2008 method A.4 and OPPTS 830.7950 to determine the vapour pressure of the test item. A vapour pressure curve with 9 data points was measured over a pressure range between 12 to 62 hPa. The vapour pressure was measured in the temperature range of 25 to 900 °C. The vapour pressure of the test item was calculated for the temperatures 20, 25 and 50 °C. The vapour pressure of the test item was determined to be 0.07 Pa at 20 °C, 0.10 Pa at 25 °C and 0.38 Pa at 50 °C respectively.