Methacrylic anhydride

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

OECD 103, GLP

Principles of method if other than guideline:

Method: differential scanning calorimetry
In a measurement with differential scanning calorimetry (DSC) a sample of the test item and a reference material (identical crucible without the test
item) are subjected to the same controlled temperature program. The difference in the temperatures of the test item and the reference
material is the original measurement signal which is internally assigned to the heat flow rate. The heat flux DSC belongs to the class of heat-
exchanging calorimeters. A defined exchange of the heat to be measured takes place via a thermal resistance. In contrast in the power
compensation DSC, the heat to be measured is compensated with electric energy, by increasing or decreasing an adjustable heating power.
When the sample undergoes a transition involving a change in enthalpy, for example an endothermic melting or boiling transition that change is
indicated by a departure from the base line of the heat flow record. The peak area is proportional to the change in enthalpy.

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

197 °C

Atm. press.:

1 002.1 hPa

Equipment:

Dynamic Differential Scanning Calorimeter Mettler DSC 820

Thermo balance Netzsch TG 209

Analytical balance (accuracy 0.01 mg)

Mercury barometer type 604

Parameters:

	Differential scanning calorimeter
Crucible:	aluminum, 40 µl, lid with hole
Purge gas:	nitrogen, 50 ml/min
Cooling:	liquid nitrogen
Heating rate:	10 K/min
Temperature range:	-150 to 0 °C Melting point
Sample amount:	5.11 / 5.94 mg
Atmospheric Pressure:	1002.1 hPa

Conclusions:

The boiling temperature of the test item was determined by differential scanning calorimetry according to EEC-Directive 92/69 EEC, Part A,
Methods for the determination of physico-chemical properties, A.2 "Boiling temperature", EEC Publication No. L383, December 1992.
The extrapolated Boiling Point was determined to be 197 °C at 1002.1 hPa.

Executive summary:

The boiling temperature of the test item was determined by differential scanning calorimetry according to EEC-Directive 92/69 EEC, Part A, Methods for the determination of physico-chemical properties, A.2 "Boiling temperature", EEC Publication No. L383, December 1992. The extrapolated Boiling Point was determined to be 197 °C at 1002.1 hPa.

NOTE: Any of data in this dataset are disseminated by the European Union on a right-to-know basis and this is not a publication in the same sense as a book or an article in a journal. The right of ownership in any part of this information is reserved by the data owner(s). The use of this information for any other, e.g. commercial purpose is strictly reserved to the data owners and those persons or legal entities having paid the respective access fee for the intended purpose.

Description of key information

EEC-Directive 92/69 EEC, Part A, Methods for the determination of physico-chemical properties, A.2 "Boiling

temperature", EEC Publication No. L383, December 1992. The extrapolated Boiling Point was determined to be 197 °C at 1002.1 hPa.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

197 °C