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Physical & Chemical properties

Melting point / freezing point

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Administrative data

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
19-03-2019 until 30-04-2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
(EC) 440/2008
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Test Item Name: 2,2'-MDI (EC Number: 219-799-4)
Substance Name: 2,2'-methylenediphenyl diisocyanate
Batch/ Lot Number: WRS4821
Expiry date: 10/03/2019 storage < 5°C

Key result
Melting / freezing pt.:
>= 40.4 - <= 44.7 °C
Conclusions:
Result : 40.4 - 44.7°C (range)
Executive summary:

Melting point: range :40.4 - 44.7°C

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: Home standard methods '2011-0466801-94D (DTA/DSC)'
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
other: 'Differential Thermal Analysis' (DTA) and 'Differential Scanning Calorimetry' (DSC)
Melting / freezing pt.:
43.14 °C
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
ca. 270 °C
Remarks on result:
other: closed crucible
Melting / freezing pt.:
42.51 °C
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
ca. 270 °C
Remarks on result:
other: closed crucible
Melting / freezing pt.:
41.83 °C
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
ca. 270 °C
Remarks on result:
other: open crucible with perforated lid
Melting / freezing pt.:
41.97 °C
Atm. press.:
1 013 hPa
Decomposition:
yes
Decomp. temp.:
ca. 270 °C
Remarks on result:
other: open crucible with perforated lid

For the melting point value only the determinations using the closed crucible have to be considered (mean value: 42.8 °C).

Conclusions:
A melting point of 42.8 °C (mean value) was determined for the test item. For the melting point value only the determinations using the closed crucible had to be considered.
Executive summary:

According to the OECD Guidelines for Testing of Chemicals, No. 102 (Melting Point/Melting range) which conforms with the EU Method A.1 (Melting/Freezing Temperature) a melting point of 42.8 °C was determined for the pure substance.

Description of key information

According to OECD method 102 a melting point of 42.8 °C (mean value) was determined for the test item.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
42.8 °C

Additional information

A melting range of 40.4 to 44.7°C was reported in a second key study.