1,3-Butanediol, reaction products with 1,1'-methylenebis[4-isocyanatobenzene], propylene glycol and tripropylene glycol

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Start date of the experimental work: 22 August 2014 and Completion date of the experimental work: 09 October 2014.

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

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Key result

Boiling pt.:

185 °C

Decomposition:

no

Remarks on result:

other: mean of 3 runs

Test A

The test was conducted in an open aluminium crucible. The sample was observed to undergo an endothermic event from 185.7C which and a heat of melting of 52.6 J.g-1. On completion of testing a blackened sample with black residue remained.

Test B

The test was conducted in an open aluminium crucible. The sample was observed to undergo an endothermic event from 182.6C which and a heat of melting of 51.9 J.g-1. On completion of testing a blackened sample with black residue remained.

Test C

The test was conducted in an open aluminium crucible. The sample was observed to undergo an endothermic event from 185.5C which and a heat of melting of 52.2 J.g-1. On completion of testing a blackened sample with black residue remained.

Result : 185°C (mean of 3 runs)

Conclusions:

The boiling point of the test item was found to be: 185°C (mean of 3 runs)

Description of key information

 The boiling point of the test item was found to be: 185°C (mean of 3 runs). However it can be concluded that all MDI substances decompose at higher temperature and hence no true boiling point can be
determined. 

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

185 °C