Pyridinium, 1-(phenylmethyl)-, ethyl methyl derivs., chlorides

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

19 FEB 2010 to 9 NOV 2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Justification for type of information:

Performed to guidelines to GLP

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

116.34 °C

Atm. press.:

ca. 1 atm

Decomposition:

no

Run 1

A smallendothermwith a peak at -57.45°C, possibly due to freezing/melting, was followed by an endotherm, with a peak at 121.53°C which was considered to be due to boiling.

Run 2

A smallendothermwith a peak at -57.08°C, possibly due to freezing/melting, was followed by an endotherm, with a peak at 111.14°C which was considered to be due to boiling.

Thermal Data for Melting/Freezing Temperatures, Boiling/Decomposition Temperatures

Parameter	Run 1	Run 2	Mean
Endotherm1
Onset (°C)	-59.24	-59.21	-59.23
Peak (°C)	-57.45	-57.08	-57.27
Enthalpy (J/g)	-54.82	-49.04	51.93
Endotherm2
Onset (°C)	81.18	105.82	93.5
Peak (°C)	121.53	111.14	116.34
Enthalpy (J/g)	-272.31	-252.04	262.18

 

Conclusions:

The mean melting point was -57.27°C and the boiling point was 116.34°C.

Executive summary:

In run 1, a small endotherm with a peak at -57.45°C, possibly due to freezing/melting, was followed by an endotherm, with a peak at 121.53°C which was considered to be due to boiling.

In run 2, a small endotherm with a peak at -57.08°C, possibly due to freezing/melting, was followed by an endotherm with a peak at 111.14°C which was considered to be due to boiling.

Description of key information

In run 1, an endotherm was observed at 121.53°C was observed.

In run 2, an endotherm was observed at 111.14°C was observed. The mean of the two scans was given as the boiling point.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

116.34 °C

Additional information

The endpoint was determined in accordance with EU Method A.2 (Boiling Temperature) and OECD Guideline 103 (Boiling Temperature).

A sample of MK92K was sealed in a vented aluminium DSC pan and scanned against a reference sample (an empty aluminium pan) from -60°C to 400°C at a heating rate of 10°C/minute after being held isothermally at -60°C for 15 minutes. Following examination of the results of this scan, a second test was performed. A second sample was scanned using the same temperature program.