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Physical & Chemical properties

Melting point / freezing point

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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
85 0504
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Inhouse data evalution - no GLP

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Report Date:
1985

Materials and methods

Principles of method if other than guideline:
Melting point determination in a cryostat
GLP compliance:
no
Type of method:
other: melting point is determined in a cryostat.Different methods are done.

Test material

Reference
Name:
Unnamed
Type:
Constituent

Results and discussion

Melting / freezing point
Melting / freezing pt.:
28 °C
Remarks on result:
other: for pure substance

Any other information on results incl. tables

The melting point of tetramethylenediamine was determined in house. The determined of the melting point was done in a cryostat. The temperature when a substance is completely melted, is the melting temperature.

The melting point of tetramethylenediamine is strongely dependenth on the water content. Therefore the melting point was also determined for tetramethylene mixture with different massfractions. see table 1

Table 1: melting point DAB/H2O mixture, inhouse evaluation

 Massfraction H2O in the mixture tested

Melting point in °C
28

 0.091

18
 0.167 7
 0.259  -8
 0.333 -16
 0.700 -14.4 

The melting point of the pure tetramethylenediamine is 28°C and therefore is considered as a solid under GHS

It is comparable with the value published in SAX's dangerous Properties of Industrial materials. (see melting point/freezing point 1

The melting point will impact the choice of method for flashpoint, flammabilty, autoflammabity, oxidising properties and explosive properties. The Melting point is not used for classification and labeling criterion or to define PBT properties. It indicates (together with the boiling point) the physical state of a compound.

Pure DAB is a solid but because the melting point is near by room temperature and very dependenth on the watercontent tetramethylenediamine will be considered as a liquid in the assesment.

Applicant's summary and conclusion

Conclusions:
The melting point of the pure tetramethylenediamine is 28°C and therefore is considered as a solid under GHS.
Executive summary:

The melting point of the pure tetramethylenediamine is 28°C and therefore is considered as a solid under GHS

It is comparable with the value published in SAX's dangerous Properties of Industrial materials. (see melting point/freezing point 1

The melting point will impact the choice of method for flashpoint, flammabilty, autoflammabity, oxidising properties and explosive properties. The Melting point is not used for classification and labeling criterion or to define PBT properties. It indicates (together with the boiling point) the physical state of a compound.

Pure DAB is a solid but because the melting point is near by room temperature and very dependenth on the watercontent tetramethylenediamine will be considered as a liquid in the assesment.