Hexamethylene diisocyanate, trimers, reaction products with 2-hydroxyethyl acrylate

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

14 Jul - 24 Jul 2015

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

GLP guideline study

Reason / purpose for cross-reference:

reference to other study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

adopted in 1995

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

adopted in 2008

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Version / remarks:

adopted in 1998

Qualifier:

according to guideline

Guideline:

other: CIPAC MT 1

Version / remarks:

adopted in 2009

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Remarks:

Hess. Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Storage conditions: Ambient temperature, keep container tightly closed, protected from sunlight.

Melting / freezing pt.:

< -100 °C

Atm. press.:

1 004.2 hPa

Remarks on result:

other: The test item has no melting point at atmospheric pressure as determined by DSC.

Results
Two very small endothermic effects with energies < 10 J/g were seen in the temperature ranges of -30 to -10 °C and 40 to 60 °C.  At approximately 310 and 350 °C in the 1^stand 2^nd DSC run respectively, the test item oozed out of the crucible.

Table 1 – DSC measurement results

Sample weight [mg]	Onset of effect [°C]	Range of effect [°C]	Weight loss [mg]	Atmospheric pressure [hPa]
16.05	-20.82 -- --	-30 to -10 (endo) 40 to 60 (endo) 210 to 310 (exo)	Unknown	1004.2
17.62	-20.78 -- --	-30 to -10 (endo) 40 to 60 (endo) 180 to 350 (exo)	16.01	1004.2

 

Due to the fact that the observed endothermic effects are very small, they cannot be used to determine the meting point of the test item.

To confirm the test item’s appearance at -30 °C, a sample of the item was placed in a freezer at -24.8 °C and checked with a spatula after one day. The test item was not solidified; it appeared as a rubber-like slightly sticky mass.

Based on the DSC measurements and the visual verification in the freezer, the test item has no freezing/melting point at atmospheric pressure down to -100 °C. It showed only a slight solidification.

Description of key information

The test item has no freezing/ melting point down to -100 °C at 1004.2 hPa ( OECD 102, DSC).