4-[2-[4-[benzylmethyl(ethyl)amino]phenyl]vinyl]-1-(2-hydroxyethyl)pyridinium acetate

Vapour pressure

Link to relevant study record(s)

Reference

Endpoint:

vapour pressure

Type of information:

experimental study

Adequacy of study:

key study

Study period:

6 October 2017 to 25 October 2017

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)

GLP compliance:

yes (incl. QA statement)

Type of method:

effusion method: Knudsen cell

Specific details on test material used for the study:

Black viscous liquid

Test no.:

#1

Temp.:

61 °C

Vapour pressure:

0.023 Pa

Test no.:

#2

Temp.:

71 °C

Vapour pressure:

0.033 Pa

Test no.:

#3

Temp.:

81 °C

Vapour pressure:

0.051 Pa

Test no.:

#4

Temp.:

91 °C

Vapour pressure:

0.07 Pa

Test no.:

#5

Temp.:

101 °C

Vapour pressure:

0.094 Pa

Test no.:

#6

Temp.:

111 °C

Vapour pressure:

0.12 Pa

Transition / decomposition:

yes

Remarks:

decomposition

Transition temp.:

>= 240 - <= 290 °C

Remarks on result:

other: decomposition

Results of the DSC-measurement

No.	Sample weight / mg	Start / °C	Energy / J/g
PN14499	6.31	240	150

Results of the Effusion method

No.	Temperature / °C	Vapour pressure / Pa
1	61	2.3 × 10^-2
2	71	3.3 × 10^-2
3	81	5.1 × 10^-2
4	91	7.0 × 10^-2
5	101	9.4 × 10^-2
6	111	1.2 × 10^-1

Conclusions:

The vapour pressure at 20°C is 0.0039 Pa

Executive summary:

Using a Knudsen cell, the vapour pressure of the substance was determined at 61 -111 °C. Based on the Antoine equation the vapour pressure at 20°C is calculated to be 0.0039 Pa.

Description of key information

Using a Knudsen cell, the vapour pressure of the substance was determined at 61 -111 °C. Based on the Antoine equation the vapour pressure at 20°C is calculated to be 0.0039 Pa.

Key value for chemical safety assessment

Vapour pressure:

0.004 Pa

at the temperature of:

20 °C