Diethyl sulphate, compound with 2-(heptadec-8-enyl)-4,5-dihydro-1H-imidazole-1-ethanol (1:1)

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2018-03-02 to 2018-09-20

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 104 (Vapour Pressure Curve)

Qualifier:

according to guideline

Guideline:

EU Method A.4 (Vapour Pressure)

Version / remarks:

2008

Qualifier:

according to guideline

Guideline:

other: OECD Test Guideline 113: Thermal Stability

Version / remarks:

1981

Guideline:

EPA OPPTS 830.7950 (Vapor Pressure)

Version / remarks:

1996

GLP compliance:

no

Type of method:

effusion method: vapour pressure balance

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material:
R-127 / batch no. 180131
- Expiration date of the lot/batch:
2019-01-31

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material:
Dry and dark at ambient temperature (10 – 30 °C)
- Stability under test conditions:
stable

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing:
none

Test no.:

#1

Temp.:

32 °C

Vapour pressure:

0.001 Pa

Test no.:

#2

Temp.:

37 °C

Vapour pressure:

0.002 Pa

Test no.:

#3

Temp.:

42 °C

Vapour pressure:

0.002 Pa

Test no.:

#4

Temp.:

63 °C

Vapour pressure:

0.005 Pa

Test no.:

#5

Temp.:

78 °C

Vapour pressure:

0.009 Pa

Test no.:

#6

Temp.:

83 °C

Vapour pressure:

0.009 Pa

Test no.:

#7

Temp.:

92 °C

Vapour pressure:

0.013 Pa

Test no.:

#8

Temp.:

102 °C

Vapour pressure:

0.018 Pa

Test no.:

#9

Temp.:

123 °C

Vapour pressure:

0.026 Pa

Test no.:

#10

Temp.:

133 °C

Vapour pressure:

0.033 Pa

Temp.:

143 °C

Vapour pressure:

0.052 Pa

Key result

Temp.:

20 °C

Vapour pressure:

0.001 Pa

Key result

Temp.:

25 °C

Vapour pressure:

0.001 Pa

Temp.:

50 °C

Vapour pressure:

0.003 Pa

Thermal Stability

The test item showed an exothermic effect in the temperature range of 120 °C – 210 °C with a decomposition energy of -70 J/g. A second exothermic effect was observed in the temperature range of 240 °C to >300 °C with a decomposition energy of >-80 J/g. The exothermic effect was not terminated at the maximum test temperature of 300 °C.

Table:     Results of the DSC-measurement

No.	Sample weight / mg	Start of effect/ °C	Energy[1]/ J/g	Remark
PN15086	6.04	120 240	-70 (exothermic) >-80 (exothermic)	Figure 1

[1]Negative energy for exothermic processes, positive energy for endothermic processes

Conclusions:

The vapour pressure of the test item diethyl sulphate, compound with 2-(heptadec-8-enyl)-4,5-dihydro-1H-imidazole-1-ethanol (1:1) was calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4. Vapour Pressure and OECD Test Guideline 104 (2006).
Temperature / °C Vapour pressure / Pa
20 8.2 × 10-4
25 1.0 × 10-3
50 2.9 × 10-3

Executive summary:

The vapour pressure of diethyl sulphate, compound with 2-(heptadec-8-enyl)-4,5-dihydro-1H-imidazole-1-ethanol (1:1) was determined in a guideline study.

The vapour pressure was calculated by interpolation and extrapolation of the measured vapour pressure curve for the temperatures 20, 25 and 50 °C, according to Regulation EC No. 440/2008 Method A.4.Vapour PressureandOECD Test Guideline 104 (2006).

Temperature / °C	Vapour pressure / Pa
20	8.2 × 10^-4
25	1.0 × 10^-3
50	2.9 × 10^-3

 

Key value for chemical safety assessment

Vapour pressure:

0.001 Pa

at the temperature of:

20 °C