Reaction products of m-phenylenebis(methylamine) with 2,2'-[(1-methylethylidene)bis(4,1-phenyleneoxymethylene)]bisoxirane

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

06 February 2018 - 09 March 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

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:

4,4'-Isopropylidenediphenol, oligomeric reaction products with 1-chloro-2,3- epoxypropane, reaction products with mphenylenebis(methylamine)

Cas Number:

113930-69-1

IUPAC Name:

4,4'-Isopropylidenediphenol, oligomeric reaction products with 1-chloro-2,3- epoxypropane, reaction products with mphenylenebis(methylamine)

Test material form:

solid

Details on test material:

- Physical appearance: light amber solid
- Storage of test material: at room temperature

Specific details on test material used for the study:

Decomposition temp.: 275°C
Glass transition: 11°C

Results and discussion

Vapour pressure

Vapour pressure 1

Key result

Temp.:

20 °C

Vapour pressure:

< 7.6 Pa

Vapour pressure 2

Key result

Temp.:

25 °C

Vapour pressure:

< 12 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]
50	1.66781	1.99E-4	-3.70	0.40	2.5
	1.55606	1.86E-4	-3.73	0.36	2.3
60	2.23051	2.66E-4	-3.57	0.56	3.6
	1.48818	1.78E-4	-3.75	0.34	2.2
70	3.18187	3.80E-4	-3.42	0.76	5.7
	1.89773	2.27E-4	-3.64	0.47	3.0
80	5.02376	6.00E-4	-3.22	1.01	10
	3.99640	4.77E-4	-3.32	0.89	7.7

The test item is a mixture of components. Weight loss was observed from the start of the study (i.e. at 30°C), and was  assumed to be due to evaporation of volatile components

The log PT versus 1/T curve for the substance over the range 40 - 70°C showed poor linearity (correlation coefficient r < 0.99). Extrapolation of the curve to 20°C or 25°C would not give reliable results for the vapour pressure of the substance at these temperatures.Since the weight loss of the test item at 50°C, 60°C, 70°C and 80°C was lower than the weight loss of reference substance naphthalene at the same temperatures, it was considered that vapour pressure of the substance at 20°C (25°C) is lower than the vapour pressure of naphthalene at 20°C (25°C).

Applicant's summary and conclusion

Conclusions:

The vapour pressure of the substance at 20°C was determined to be < 7.6 Pa.
The vapour pressure of the substance at 25°C was determined to be < 12 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. The log PT versus 1/T curve for the substance over the range 40 - 70°C showed poor linearity (correlation coefficient r < 0.99). Extrapolation of the curve to 20°C or 25°C would not give reliable results for the vapour pressure of the substance at these temperatures.

From the measured weight losses in the temperature range 50 - 80°C, the vapour pressure of the substance was determined to be lower than the vapour pressure of reference substance naphthalene. The vapour pressure of the substance at 20°C and 25°C was concluded to be < 7.6 Pa and < 12 Pa, resp.