6-[2-(2-methyl-1H-imidazol-1-yl)ethyl]-1,3,5-triazine-2,4-diamine

Vapour pressure

Administrative data

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

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:

OECD Guideline 104 (Vapour Pressure Curve)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

GLP compliance:

yes (incl. QA statement)

Remarks:

Ministry of Health, Italy.

Type of method:

effusion method: Knudsen cell

Remarks:

Also effusion method: Knudsen cell.

Test material

Test material information

Constituent 1

Reference substance name:

6-[2-(2-methyl-1H-imidazol-1-yl)ethyl]-1,3,5-triazine-2,4-diamine

EC Number:

254-074-6

EC Name:

6-[2-(2-methyl-1H-imidazol-1-yl)ethyl]-1,3,5-triazine-2,4-diamine

Cas Number:

38668-46-1

Molecular formula:

C9H13N7

IUPAC Name:

6-[2-(2-methyl-1H-imidazol-1-yl)ethyl]-1,3,5-triazine-2,4-diamine

Results and discussion

Vapour pressure

Key result

Temp.:

20 °C

Vapour pressure:

0 Pa

Any other information on results incl. tables

Results of the analysis

The result of the thermogravimetric analysis for test item and the vapour pressure at 20 °C are given in the following table:

Temperature [°C]	Δm [mg]	Δt [min]	Temperature [K]
125.6	0.0544	80	398.75
125.8	0.0596	80	398.95
134.2	0.0936	80	407.35
134.5	0.0954	80	407.65
143.2	0.1904	80	416.35
143.5	0.1930	80	416.65
152.4	0.4250	80	425.55
152.4	0.4282	80	425.55
161.6	0.9920	80	434.75
161.6	1.0084	80	434.75
1/Temperature [1/K]	Δm/Δt [kg/s]	Vapour pressure [Pa]	log p
2.51E-03	1.13E-11	8.36E-02	-1.0779
2.51E-03	1.24E-11	9.16E-02	-1.0381
2.45E-03	1.95E-11	1.45E-01	-0.8376
2.45E-03	1.99E-11	1.48E-01	-0.8291
2.40E-03	3.97E-11	2.99E-01	-0.5244
2.40E-03	4.02E-11	3.03E-01	-0.5184
2.35E-03	8.85E-11	6.75E-01	-0.1710
2.35E-03	8.92E-11	6.80E-01	-0.1677
2.30E-03	2.07E-10	1.59E+00	0.2018
2.30E-03	2.10E-10	1.62E+00	0.2089
y =mx +q	Parameter m (slope)	Parameter q (intercept)	Parameter R^2 (correlation)
	-6149	14	0.98854
Extrapolation at 20 °C	1/Temperature [1/K]	log p	Vapour pressure [Pa]
	0.00341	-6.6783	2.10 x 10^-7

Since the analysis was conducted under high vacuum conditions, the heat could be transferred only by radiation, this caused a consistent difference between the furnace temperature and the sample one and a considerable time for the system to reach equilibrium.

The temperatures reported (registered by the thermocouple under the Knudsen cell) are hence different from the one set and the mass loss has been measured only in 80 minutes time interval within each isotherm, after the system had reached equilibrium.

Applicant's summary and conclusion

Conclusions:

This study was performed to determine the vapour pressure of the test item supplied by the Sponsor according to: OECD Guideline No. 104, EC method A.4.

The vapour pressure of the test sample can be estimated as follows:

P = 2.10 x 10 -7 Pa = 1.57 x 10 -9 mmHg at 20°C