Dodecanedioic acid, compound with 2,2',2''-nitrilotriethanol (1:2)

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 12 June 2017 to 20 September 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

2009

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:

Dodecanedioic acid, compound with 2,2',2''-nitrilotriethanol

EC Number:

285-271-5

EC Name:

Dodecanedioic acid, compound with 2,2',2''-nitrilotriethanol

Cas Number:

85049-97-4

Molecular formula:

C12H22O4.xC6H15NO3

IUPAC Name:

dodecanedioic acid - 2,2',2''-nitrilotriethanol (1:1)

1

Reference substance name:

Water

EC Number:

231-791-2

EC Name:

Water

Cas Number:

7732-18-5

Molecular formula:

H2O

IUPAC Name:

Dihydrogen oxide

Test material form:

solid

Remarks:

paste

Details on test material:

Name as cited in report: DDDA TEA salt
Physical appearance: beige to pale yellow paste
Storage conditions: at room temperature

Specific details on test material used for the study:

Melting point: 26.2°C.

Results and discussion

Vapour pressure

Vapour pressure 1

Key result

Temp.:

20 °C

Vapour pressure:

<= 0.003 Pa

Vapour pressure 2

Key result

Temp.:

25 °C

Vapour pressure:

<= 0.005 Pa

Any other information on results incl. tables

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

 

Temperature [°C]	Weight loss [µg/min]	vT [g/cm2/h]	log vT	log PT	PT [Pa]
110	7.93611	9.47 E-4	-3.02	1.17	15
	10.8284	1.29 E-3	-2.89	1.34	22
	9.38273	1.12 E-3	-2.95	1.26	18
120	15.1747	1.81 E-3	-2.74	1.53	34
	18.0437	2.15 E-3	-2.67	1.62	42
	15.1992	1.81 E-3	-2.74	1.53	34
130	27.5639	3.29 E-3	-2.48	1.85	71
	30.7645	3.67 E-3	-2.44	1.91	82
	29.1819	3.48 E-3	-2.46	1.88	77
140	44.6395	5.33 E-3	-2.27	2.12	1.3 E2
	49.0498	5.85 E-3	-2.23	2.17	1.5 E2
	48.0555	5.74 E-3	-2.24	2.16	1.4 E2

 

Applicant's summary and conclusion

Conclusions:

The vapour pressure of the substance at 20°C was determined to be ≤ 2.9E-3 Pa.
The vapour pressure of the substance at 25°C was determined to be ≤ 5.5E-3 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.

A vapour pressure curve was constructed from duplicate measurements at 110°C, 120°C, 130°C and 140°C. The vapour pressure of the substance at 20°C and 25°C was determined by extrapolation to be 2.9E-3 Pa and 5.5E-3 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 ≤ 2.9E-3 Pa and ≤ 5.5E-3 Pa, resp.