2-(2-thienyl)ethyl toluene-p-sulphonate

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

07 Nov 2017 - 24 Nov 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

2016

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

2006

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7950 (Vapor Pressure)

Version / remarks:

1996

Deviations:

no

GLP compliance:

yes

Type of method:

effusion method: isothermal thermogravimetry

Test material

Test material information

Constituent 1

Reference substance name:

2-(2-thienyl)ethyl toluene-p-sulphonate

EC Number:

254-911-5

EC Name:

2-(2-thienyl)ethyl toluene-p-sulphonate

Cas Number:

40412-06-4

Molecular formula:

C13H14O3S2

IUPAC Name:

2-(thiophen-2-yl)ethyl 4-methylbenzene-1-sulfonate

Test material form:

solid: particulate/powder

Details on test material:

- Physical appearance: white to off-white powder
- Test item storage: at room temperature

Specific details on test material used for the study:

Decomposition temp.: 200°C

Results and discussion

Vapour pressure

Vapour pressure 1

Key result

Temp.:

20 °C

Vapour pressure:

<= 0 Pa

Vapour pressure 2

Key result

Temp.:

25 °C

Vapour pressure:

<= 0 Pa

Any other information on results incl. tables

Table: Results of the isothermal TGA analysis (test item)

Temperature [°C]	Weight loss [µg/min]	νT [g/cm^2/h]	logνT	logPT	PT [Pa]
100	0.671339	8.01 x 10^-5	-4.10	-0.11	0.78
	0.888386	1.06 x 10^-4	-3.97	0.05	1.1
110	1.48996	1.78 x 10^-4	-3.75	0.34	2.2
	1.71855	2.05 x 10^-4	-3.69	0.42	2.6
120	3.16698	3.78 x 10^-4	-3.42	0.76	5.7
	3.40454	4.06 x 10^-4	-3.39	0.80	6.3
130	6.39763	7.64 x 10^-4	-3.12	1.15	14
	6.61943	7.90 x 10^-4	-3.10	1.17	15

Applicant's summary and conclusion

Conclusions:

The vapour pressure of the substance at 20°C was determined to be <= 4.1E-5 Pa.
The vapour pressure of the substance at 25°C was determined to be <= 9.1E-5 Pa.

Executive summary:

The vapour pressure of the substance was determined using the isothermal thermogravimetric effusion method in a GLP study according to EC A.4, OECD 104 and OPPTS 830.7950.

The constants specific for the experimental arrangement were determined using a set of 5 reference compounds. A vapour pressure curve for the test item was constructed from duplicate measurements at 100°C, 110°C, 120°C and 130°C. The vapour pressure of the substance at 20°C and 25°C was determined by extrapolation to be 4.1E-5 Pa and 9.1E-5 Pa, resp.

Since the weight losses of the test item were obtained with a temperature program of above the melting temperature of the test item, the vapour pressure of the test item could be slightly overestimated. The vapour pressure of the substance at 20°C and 25°C was therefore reported as ≤ 4.1E-5 Pa and ≤ 9.1E-5 Pa, resp.