Poly[oxy(methyl-1,2-ethanediyl)], .alpha.-hydro-.omega.-[2-[[2,2-dimethyl-3-[(1-oxododecyl)oxy]propylidene]amino]methylethoxy]-, ether with 2-ethyl-2-(hydroxymethyl)-1,3-propanediol (3:1)

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2015-08-25 to 2016-01-29

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Version / remarks:

2006

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

2009

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7950 (Vapor Pressure)

Version / remarks:

1996

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

effusion method: by loss of weight or by trapping vaporisate

Key result

Temp.:

20 °C

Vapour pressure:

0.001 Pa

Key result

Temp.:

25 °C

Vapour pressure:

0.001 Pa

The measured values for temperature and vapour pressure were evaluated as follows:  

Parameter	T	Mean P	1/T	log P
Unit	K	Pa	1/K	log Pa
Value	303.2	1.47E-03	3.2982E-03	2.8315
	318.2	4.40E-03	3.147E-03	-2.3566
	333.2	1.20E-02	3.0012E-03	-1.9224

 

A graph with log P vs. 1/T was plotted. Since the values were correlated by a linear relation, the data could be fitted by linear regression.

Parameter	Value
Slope	-3061.3
Intercept	7.2646
Correlation Coefficient r	-1.0000
Coefficient of Determination r^2	1.0000

 

 The following vapour pressures were determined experimentally and considered as valid (mean and standard deviation given): 

T	T	P	Stand. Dev. P	RSD P
°C	K	Pa	Pa	%
30.0	303.2	1.47E-03	1.62E-04	11.0%
45.0	318.2	4.40E-03	5.06E-03	11.5%
60.0	333.2	1.20E-02	3.23E-03	27.0%

 

Conclusions:

The vapour pressure of the test item was determined to be 6.64E-4 Pa at 20 °C and 9.93E-4 Pa at 25 °C.

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. The vapour pressure of the test item SIKA Hardener LI was determined at four different temperatures (30, 45, 60 and 75 °C) following EU A.4 using the effusion method (weight loss). Experiment 4 (temperature 75 °C) showed clear signs of decomposition and to avoid bias, these measurements were not used for calculations. Three experiments could be evaluated as they showed relevant and reproducible weight loss. All evaluated experiments showed good to medium reproducibility, giving a perfect correlation. Therefore, the result of the test can be considered valid. The vapour pressure of the test item was determined to be 6.64E-4 Pa at 20 °C and 9.93E-4 Pa at 25 °C.

Description of key information

The vapour pressure of the test item was determined to be 6.64E-4 Pa at 20 °C and 9.93E-4 Pa at 25 °C.

Key value for chemical safety assessment

Vapour pressure:

0.001 Pa

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. The vapour pressure of the test item SIKA Hardener LTJ was determined at four different temperatures (30, 45, 60 and 75 °C) following EU A.4 using the effusion method (weight loss). Experiment 4 (temperature 75 °C) showed clear signs of decomposition and to avoid bias, these measurements were not used for calculations. Three experiments could be evaluated as they showed relevant and reproducible weight loss. All evaluated experiments showed good to medium reproducibility, giving a perfect correlation. Therefore, the result of the test can be considered valid. The vapour pressure of the test item was determined to be 6.64E-4 Pa at 20 °C and 9.93E-4 Pa at 25 °C.