4,4'-Methylenediphenyl diisocyanate, oligomers

Explosiveness

Link to relevant study record(s)

Reference

Endpoint:

explosiveness, other

Type of information:

other: exemption statement

Adequacy of study:

key study

Study period:

Start date of the experimental work: 12 June 2009 and Completion date of the experimental work: 02 July 2009.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Exemption statement

Justification for type of information:

Experimental techniques are available for the classification of a substance or preparation as explosive. These are described in EC Test A14. However, according to the OECD testing methods publication, test A14 need not to be carried out when examination of the structural formula establishes beyond reasonable doubt that the substance has no explosive properties (i.e. it is not capable of rapid gas or heat release).

Qualifier:

no guideline followed

Principles of method if other than guideline:

exemption statement

GLP compliance:

no

Parameter:

other: Explosive (not specified)

Remarks:

migrated information

Remarks on result:

not measured/tested

Remarks:

Based on the combination of factors, it is beyond reasonable doubt that the material will not exhibit explosive properties. There are no elements of the screening procedure which begin to suggest that explosive properties may be exhibited by the substance.

Assessment of Explosive Properties of test material

Examination of the structural formula indicates:

• There are no chemical groups associated with explosive properties.

• The oxygen is not bound in energetic functional groups – it is bound in CO groups which do not possess explosive behaviour.

• Thermal stability analysis has been conducted on the sample using Differential Scanning Calorimetry (DSC). Two exothermic events were observed. The first from 181.3°C (454.45 K) (-16.4 J.g-1) and the second from 301.6°C (574.75 K) (-181.4 J.g-1). The total heat of decomposition was found to be less than 500 J/g.

Based on this combination of factors, it is beyond reasonable doubt that the material will not exhibit explosive properties. There are no elements of the screening procedure which begin to suggest that explosive properties may be exhibited by the substance. The conduct of the A14 tests is therefore not considered appropriate.

Differential Scanning Calorimetry (DSC)

A sample of the test substance was charged to a gold (high pressure) DSC crucible which was then sealted and placed in the furnace. The sample was then ramped from 25°C to 500°C at 4 K. min-1.

Test results

The sample was observed to undergo an exothermic event from 181.3°C which had a heat of decomposition of -16.4 J.g-1, a second exothermic event was observed to commencev from 301.6°C which had a heat of decomposition of -181.4 J.g-1.

Interpretation of results:

GHS criteria not met

Conclusions:

Based on combination of factors, it is beyond reasonable doubt that the material will not exhibit explosive properties. There are no elements of the screening procedure which begin to suggest that explosive properties may be exhibited by the substance.
Therefore the test item is non-explosive.

Description of key information

Based on combination of factors, it is beyond reasonable doubt that the material will not exhibit explosive properties. There are no elements of the screening procedure which begin to suggest that explosive properties may be exhibited by the substance.

Therefore the test item is non-explosive.

Key value for chemical safety assessment

Explosiveness:

non explosive