Reaction products of 1,4-Benzenedimethanol and 1-naphthol

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

30 October 2019 to 01 November 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Deviations:

no

GLP compliance:

yes

Other quality assurance:

other: Not specified

Type of method:

effusion method: isothermal thermogravimetry

Specific details on test material used for the study:

No further details specified in the study report

Key result

Test no.:

#1

Temp.:

20 °C

Vapour pressure:

0.002 Pa

Key result

Test no.:

#2

Temp.:

25 °C

Vapour pressure:

0.006 Pa

Significant weight loss was observed from the start of the study, and was most probably due to evaporation of volatile components or water absorped by the test item. In the range of 40°C- 70°C, non-linear weight loss was observed (r<0.99) hence the results were not reliable for the determination of the vapour pressure. Therefore the weight losses were compared with the results of naphthalene.

From 120°C upwards, an increase in weight loss was observed which was most likely due toreaction and/or decomposition. Therefore weight loss was determined in the range of 100°Cand 130°C. Within this range, non-linear weight loss was observed (r<0.99) hence the resultswere not reliable for the determination of the vapour pressure. Therefore the the weight losseswere compared with the results of hexachlorobenzene.

Since the weight loss of the test item was lower than the weightloss of the reference compound the vapour pressure of the test item is considered to be lower than that of hexachlorobenzene

Results of the Vapour pressure Isothermal TGA Analysis

Temperature [°C]	Weight loss [μg/min]	vr [g/cm^2/h]	log vr	log Pr	Pr [Pa]
100	0.487906	5.82 x 10^-5	-4.23	-0.14	0.73
	0.706250	8.43 x 10^-5	-4.07	0.04	1.1
110	0.328779	3.92 x 10^-5	-4.41	-0.33	0.47
	0.356734	4.26 x 10^-5	-4.37	-0.29	0.51
120	0.467985	5.59 x 10^-5	-4.25	-0.16	0.69
	0.621511	7.42 x 10^-5	-4.13	-0.02	0.96
130	0.710741	8.48 x 10^-5	-4.07	0.05	1.1
	1.04524	1.25 x 10^-4	-3.90	0.23	1.7

  

Vapour Pressure of a part of the Test Item

Temperature [°C]	[Pa]	[mm Hg]
20	<1.5 x 10^-3	<1.1 x 10^-3
25	<6.3 x 10^-3	<4.7 x 10^-3

Conclusions:

The vapour pressure of a small part of the test item at 20°C (293K) and 25°C (298K) was:
20°C
[Pa] [mm Hg]
<7.6 <5.7 × 10-2

25°C
[Pa] [mm Hg]
<12 <8.6 × 10-2


The vapour pressure of a big part of the test item at 20°C (293K) and 25°C (298K) was:
20°C
[Pa] [mm Hg]
<1.5 x 10-3 <1.1 × 10-3

25°C
[Pa] [mm Hg]
<6.3 x 10-3 <4.7 × 10-3

Executive summary:

The objective of this study was to determine the vapour pressure of test item CAS 113601 -85 -7, in accordance to OECD test guideline 104, in compliance with GLP.

The isothermal TGA effusion method was applied for the determination of the vapour pressure of CAS 113601 -85 -7.

The vapour pressure for a small part of the test item ( approximately 3 - 4%) at 20°C (293K) and 25°C (298K) was determined to be lower than reference compound naphthalene:

20°C

[Pa] < 7.6, [mm Hg] <5.7 × 10 -2.

25°C

[Pa] < 12, [mm Hg] <8.6 × 10 -2.

The vapour pressure for the rest of the test item at 20°C (293K) and 25°C (298K) was determined to be lower than the reference compound hexachlorobenzene:

20°C

[Pa] < 1.5 x 10 -3, [mm Hg] <1.1 × 10 -2.

25°C

[Pa] < 6.3 x 10 -3, [mm Hg] <4.7 × 10 -3.

Description of key information

Vapour Pressure of the Test Item

Temperature [°C]	[Pa]	[mm Hg]
20	<1.5 x 10^-3	<1.1 x 10^-3
25	<6.3 x 10^-3	<4.7 x 10^-3

Key value for chemical safety assessment

Vapour pressure:

0.002 Pa

at the temperature of:

20 °C