2-(1-oxa-4-azaspiro[4.5]dec-4-yl)ethyl methacrylate

Boiling point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

boiling point

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Reference 2

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental start date: 29 November 2016. Experimental completion date: 16 May 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Identification: 2-(1-oxa-4-azaspiro[4.5]dec-4-yl)ethyl methacrylate (CAS 4203-89-8)
Appearance/physical state: extremely pale yellow slightly viscous liquid
Batch: 1609501020
Purity: 94.5%
Expiry date: 05 October 2017
Storage conditions: approximately 4 °C, in the dark

Key result

Atm. press.:

102.9 kPa

Decomposition:

yes

Decomp. temp.:

136 °C

Remarks on result:

not determinable

The test item has been determined to decompose from approximately 136 °C (409 K) at 102.9 kPa. As the test item decomposed, no value for the boiling point could be determined. As a result of the initial low rate of enthalpy change during decomposition, the onset temperature could only be approximated. To present a worst case scenario with regards to thermal stability, the lowest observed decomposition onset temperature has been reported as the overall result.

Additional determinations were also performed under a nitrogen atmosphere, but again the test item did not successfully boil. Although the degree of decomposition was reduced, a black residue again remained on completion of all determinations.

Conclusions:

The test item has been determined to decompose from approximately 136 °C (409 K) at 102.9 kPa. As the test item decomposed, no value for boiling point could be determined.

Executive summary:

Boiling Point. The test item has been determined to decompose from approximately 136 °C (409 K) at 102.9 kPa, by differential scanning calorimetry. Testing used a procedure designed to be compatible with Method A.2 Boiling Temperature of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 103 of the OECD Guidelines for Testing of Chemicals, 27 July 1995. As the test item decomposed, no value for the boiling point could be determined.

Description of key information

The substance decomposes before boiling, from 136 oC

Key value for chemical safety assessment

Temperature of decomposition (state purity):

136 °C