4-(1,1-dimethylethyl)cyclohexyl methacrylate

Boiling point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

boiling point

Data waiving:

study technically not feasible

Justification for data waiving:

other:

Reference 2

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

supporting study

Study period:

Experimental starting date: 03 January 2017 Experimental completion date: 23 March 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Identification: 4-tert-butylcyclohexyl methacrylate
(CAS 46729-07-1)
Appearance/physical state: clear colourless liquid (on melting)
Batch: DAR-16030
Purity: 89.2%
Expiry / retest date: 01 August 2018
Storage conditions: approximately 4 °C, in the dark

Key result

Boiling pt.:

274 °C

Atm. press.:

100.6 kPa

Decomposition:

yes

Decomp. temp.:

195 °C

 Results

The thermographic data for determinations 3, 4 and 5 are shown in the following table.

 Thermographic Data

Thermal Event	Interpretation	Temperature
		Det 1		Det 2		Det3
		ºC	K	ºC	K	ºC	K
Approximate onset of exotherm.	Approximate onset of decomposition.	207.80	481	203.15	476	195.29	468
Extrapolated endotherm onset temperature.	Partial boiling of the test item and/or decomposition products.	274.40	548	273.56	547	274.00	547

Atmospheric pressure: 100.6 kPa

Overall result: The test item decomposed from approximately 195 °C (468 K) before the test item and/or decomposition products underwent partial boiling at 274 °C (547 K).

Discussion

As a result of the initial low rate of enthalpy change during decomposition, the onset temperature could only be approximated. The lowest observed onset temperature from the triplicate determinations has been reported as the overall result to present a worst case scenario with respect to thermal stability.

Conclusions:

The test item decomposed from approximately 195 °C (468 K) before the test item and/or decomposition products underwent partial boiling at 274 °C (547 K).

Executive summary:

The test item decomposed from approximately 195 °C (468 K) before the test item and/or decomposition products underwent partial boiling at 274 °C (547 K). Testing was performed by differential scanning calorimetry, using a procedure designed to be compatible with Method A.2 Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008and Method 103 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Description of key information

the substance decomposes before boiling