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Physical & Chemical properties

Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
20 January 2016 - 11 March 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes
Type of method:
capillary method
Key result
Melting / freezing pt.:
49.2 °C
Atm. press.:
765.3 mm Hg
Decomposition:
no

Determination of Melting Point/Melting Range for the Test Substance

 

 

Subsample
ID

Instrument
Gradient
(°C/min)

Barometric
Pressure
(mm Hg)

Start of

Melting Range

°C (K)1

End of Melting Range
°C (K)1

Melting
Point
°C (K)1

 

523C-215-1

 

523C-215-2

 

523C-215-3

 

 

1.0

 

1.0

 

1.0

 

 

765.3

 

765.3

 

765.3

 

 

49.2 (322.4)

49.6 (322.8)

48.8 (322.0)

 

 

72.6 (345.8)

73.1 (346.3)

72.8 (346.0)

 

 

49.2 (322.4)

49.6 (322.8)

48.8 (322.0)

 

Overall Means:

Standard Deviations:

CV (%):

765.3

0.0

0.00

49.2 (322.4)

0.4 (0.4)

0.81 (0.12)

72.8 (346.0)

0.3 (0.3)

0.35 (0.07)

49.2 (322.4)

0.4 (0.4)

0.81 (0.12)

1K (Kelvin) = °C + 273.15  Note: All calculations were performed using EXCEL 2010 in full precision mode.

 

Conclusions:
The test substance sample provided a mean melting point of 49.2 ± 0.4°C (322.4K) and a mean melting range from 49.2 ± 0.4°C (322.4K) to 72.8 ± 0.3°C (346.0K).
Executive summary:

Tests were performed to determine the melting and boiling point/range of the test substance. The study was performed based on procedures in the U.S. EPA Product Properties Test Guidelines, OPPTS 830.7200,Melting Point/Melting Range(1); OECD Guideline for the Testing of Chemicals, 102,Melting Point/Melting Range(2); U.S. EPA Product Properties Test Guidelines, OPPTS 830.7220,Boiling Point/Boiling Range(3); and OECD Guideline for the Testing of Chemicals, 103,Boiling Point(4). The experimental portion of the study was conducted between January 20 and 21, 2016. 

The test substance sample provided a mean melting point of 49.2 ± 0.4°C (322.4K) and a mean melting range from 49.2 ± 0.4°C (322.4K) to 72.8 ± 0.3°C (346.0K).

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
29 November 2000
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
yes
Type of method:
capillary method
Specific details on test material used for the study:
Appearance: Light Borwn Solid
Storage Condition: Room Temperatire in the dark
Expiry date: September 2004
Key result
Melting / freezing pt.:
>= 71 - <= 73.5 °C
Decomposition:
no
Conclusions:
The melting range of the test substance was found to be 71.0 to 73.5 oC at normal atmospheric pressure
Executive summary:

The melting temperature was determined using the metal block method.

Dried test substance was pulverised to a fine powder and a small amount tightly packed into a capillary tube to a height of 3 mm. Following an initial estimation of melting point, the melting point apparatus was set at approximately 10°C below the expected melting temperature. The capillary tube was placed in the apparatus and heated at 1°C/minute until melting was complete. The procedure was performed in duplicate using a fresh sample on each occasion.

The melting range of the test substance was found to be 71.0 to 73.5°C.

Description of key information

Two studies were performed on the registered substance. The substance a mean melting range from 49.2 to 73.5 °C

Key value for chemical safety assessment

Additional information