Trimethoxy(3,3,3-trifluoropropyl)silane

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental start date 02 July 2019, Experimental completion date 24 July 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2019

Report date:

2019

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

static method

Test material

Test material information

Constituent 1

Reference substance name:

Trimethoxy(3,3,3-trifluoropropyl)silane

EC Number:

207-059-3

EC Name:

Trimethoxy(3,3,3-trifluoropropyl)silane

Cas Number:

429-60-7

Molecular formula:

C6H13F3O3Si

IUPAC Name:

trimethoxy(3,3,3-trifluoropropyl)silane

Test material form:

liquid

Specific details on test material used for the study:

Identification: ST2092NM
Chemical Name:Trimethoxy(3,3,3-trifluoropropyl)silane
Batch:802496
Purity:100%
Physical State/Appearance: Clear, colourless liquid
Expiry Date:13 March 2020
Storage Conditions:Room temperature (15 to 25°C), dark

Results and discussion

Vapour pressure

Key result

Temp.:

25 °C

Vapour pressure:

1 200 Pa

Remarks on result:

other: mean of two runs

Any other information on results incl. tables

Results:

A measured value of 12000 Pa at 50°C was obtained for the vapour pressure of the reference substance, water, in good agreement with the literature value of 12300 Pa (LIDE, D.R.,Handbook of Chemistry and Physics, 75^thEd. CRC Press, 1994).

	Run 1	Run 2
Correlation:	-0.9958	-0.9998
Slope:	-2329	-2290
Intercept:	10.89	10.75
Vp (Pa) at 25°C:	1190	1180

The two runs gave a mean vapour pressure value of 1190 Pa at 25°C.

The full results of the two runs are presented in Tables 1 and 2 below:

A graphical representation is given in attached background material.

Table1            Determination of the vapour pressure of ST2092NM (Run 1)

 

Temperature (°C)	Temperature (K)	1/Temperature (1/K)	Vapour pressure (Pa)	Log10Vp
50.0	323.15	0.003095	5000	3.70
55.0	328.15	0.003047	6000	3.78
60.0	333.15	0.003002	7600	3.88
65.0	338.15	0.002957	10000	4.00
70.0	343.15	0.002914	13000	4.11

Table2            Determination of the vapour pressure of ST2092NM (Run 2)

 

Temperature (°C)	Temperature (K)	1/Temperature (1/K)	Vapour pressure (Pa)	Log10Vp
50.0	323.15	0.003095	4600	3.66
55.0	328.15	0.003047	6000	3.78
60.0	333.15	0.003002	7600	3.88
65.0	338.15	0.002957	9500	3.98
70.0	343.15	0.002914	12000	4.08

Applicant's summary and conclusion

Conclusions:

The vapour pressure of the test item was found to be 1200 Pa at 25°C.

Executive summary:

The purpose of this study was to determine the vapour pressure of the test item, ST2092NM. 

The study was conducted in accordance with OECD Method 104 and EC Method A.4.

The test item was determined to have a vapour pressure of 1200 Pa at 25°C.