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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
04.09.98 to 22.09.98
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
not specified
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
not specified
GLP compliance:
yes (incl. QA statement)
Remarks:
Swiss GLP
Type of method:
capillary method
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: TVR50
- Expiration date of the lot/batch: September 1, 2004

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: in a closed bottle at room temperature
- Stability under test conditions: stable under storage conditions
Melting / freezing pt.:
> 400 °C
Remarks on result:
other: Atmospheric pressure and decomposition details were not specified

In the preliminary experiment as well as in the main experiment no melting of the test substance as observed up to 400 °C. However, beginning at approx. 320 °C foaming of the substance was seen, which may indicate decomposition.

Conclusions:
No melting of the test substance was observed up to 400 °C.
Executive summary:

Melting point test with FAT 40571/A was carried out according to OECD 102 and EU A1 guidelines using capillary method. In the preliminary test the melting temperature tube was filled to a height of approximately 2 mm. The nominal temperature was continuously increased until the test substance melted. The approximate melting temperature was read off from the display. Below 400 °C no melting was observed at a heating rate of 25 °C/min.

When the test substance tube is inserted in the metal block at > 320 °C (= 593 K) the test substance begins to foam and the volume expands.

Starting from a preheated temperature of < 290 °C (= 563 K), below 400 °C (= 673 K) no melting point was detected.

Description of key information

No melting of the Reactive Brown 49 was observed up to 400 °C temperature.

 

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
400 °C

Additional information

Melting point test with FAT 40571/A was carried out according to OECD 102 and EU A1 guidelines using capillary method. In the preliminary test the melting temperature tube was filled to a height of approximately 2 mm. The nominal temperature was continuously increased until the test substance melted. The approximate melting temperature was read off from the display. Below 400 °C no melting was observed at a heating rate of 25 °C/min.

When the test substance tube is inserted in the metal block at > 320 °C (= 593 K) the test substance begins to foam and the volume expands.

Starting from a preheated temperature of < 290 °C (= 563 K), below 400 °C (= 673 K) no melting point was detected.