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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:
Experimental starting date: 21 May 2014 and Experimental Completion date: 24 September 2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
27 July 1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
30 May 2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
method to determine freezing temperature
Key result
Melting / freezing pt.:
< -20 °C
Decomposition:
no
Remarks on result:
other: Observation: The test item became increasingly viscous during cooling Result: Freezing temperature: Less than - 20°C (<253K)

RESULTS:

Cooling data for Determinations 1 and 2 are shown in the following tables:

Determination 1.

 Times (s) Temperature (°C)  Time (s)  Temperature (°C)  Time (s)  Temperature (°C) 
0  20.0  1200  8.0 2400  -8.5 
30  19.0  1230  7.5 2430  -9.0 
60  18.5  1260  7.5 2460 -10.0 
90  17.0  1290  7.5 2490 -10.0 
120  16.5  1320  7.5 2520 -10.0 
150  16.0  1350  7.0 2550  -10.0 
180  16.0  1380  7.0 2580 -10.5 
210  15.5  1410  7.0 2610 -11.0 
240  15.0  1440  7.0 2640   -11.5
270  14.5  1470  6.5 2670  -12.0 
300  14.5  1500  6.5 2700   -12.5
330  13.5  1530  6.0 2730  -13.0 
360  13.5  1560  5.5 2760  -13.5 
390  13.5  1590  5.5 2790  -13.5 
420  13.0  1620  5.5 2820  -14.0 
450  13.0  1650  5.5 2850  -14.5 
480  12.5 1680   5.0 2880  -14.5 
510  12.5  1710  4.0 2910  -15.0
540  12.0  1740  3.5 2940  -15.0 
570  12.0  1770  3.0 2970  -16.0
600  11.5  1800  3.0 3000  -16.0 
630  11.5  1830  2.0 3030  -16.5 
660  11.0  1860  1.5 3060  -17.0 
690  11.0  1890  1.0 3090  -17.0 
720  10.5  1920  0 3120  -17.5
750  10.5  1950  -1.5 3150  -18.0
780  10.0  1980  -2.0 3180  -18.5 
810  10.0  2010  -3.0 3210  -18.5 
840  10.0  2040  -3.5 3240  -19.0
870  9.5  2070  -4.0 3270  -19.0 
900  9.5  2100  -4.5 3300  -19.5 
930  9.5  2130  -5.0 3330  -19.5
960   9.0  2160  -6.0 3360  -20.0 
990  9.0  2190  -6.0 3390  -20.0 
1020  9.0  2220  -7.0 3420  -20.0
1050  8.5  2250  -7.0 3450 -20.5 
1080  8.5  2280  -7.0 3480  -20.5
1110  8.5  2310  -7.5 3510  -20.5 
1140  8.0  2340  -8.0 3540  -21.0
 1170  8.0  2370  -8.0 3570  -21.5 

Observation: The test item became increasingly viscous during cooling

Result: Freezing temperature: Less than - 20°C (<253K)

DETERMINATION 2:

 Times (s) Temperature (°C)  Time (s)  Temperature (°C)  Time (s)  Temperature (°C) 
0 21.5  960 3.5   1920 -12.5 
30 20.5  990 3.0   1950 -13.0 
60 20.0 1020  2.5   1980 -13.5 
90 19.5  1050 2.0   2010 -14.0 
120 19.0 1080  2.0   2040 -14.0 
150 18.0 1110  1.0   2070 -14.5 
180 17.5 1140  0.5   2100 -16.0 
210 17.0 1170  2130 -16.0 
240 16.0 1200   2160 -17.0 
270 15.5 1230 -0.5   2190 -17.0 
300 14.5 1260  -1.0   2220 -17.5 
330 14.0 1290  -2.0   2250 -17.5 
360 13.0 1320  -2.5  2280  -18.0 
390 12.5  1350 -3.0   2310  -18.5
420 12.0  1380 -3.5   2340 -18.5 
450 11.0 1410  -3.5   2370 -18.5 
480 10.5 1440  -4.0   2400 -19.0 
510 10.0 1470  -4.5   2430  -19.0
540 9.0 1500 -5.5   2460 -19.0 
570 8.5 1530  -6.0   2490 -19.0 
600 8.0 1560  -6.5   2520 -19.5 
630 7.5 1590  -7.0   2550 -19.5 
660 7.0 1620  -7.5   2580 -19.5 
690 7.0 1650  -7.5  2610  -19.5 
720 6.5 1680  -8.0   2640 -20.0 
750 6.0 1710  -8.5   2670 -20.0 
780 5.5 1740  -9.0   2700 -20.0 
810 5.0 1770  -10.0   2730 -20.5 
840 5.0 1800  -10.0   2760 -20.5 
870 4.5 1830  -11.0   2790 -21.0 
900 4.0 1860 -12.0   2820 -21.0 
930 3.5 1890  -12.5  2850 -21.5 

Observation: The test item became increasingly viscous during cooling

Result: Freezing temperature: Less than - 20°C (<253K)

  

         
Conclusions:
Melting/Freezing Temperature: Less than -20°C (<253 K)
Executive summary:

Melting/Freezing Temperature: Less than -20°C (<253 K) using BS4633: Method for the determination of Crystallizing Point, designed to be compatible with Method A1 Melting/Freezing Temperature of Commission Regulation (EC) N°440/2008 of 30 May 2008 and Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.

Description of key information

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-20 °C

Additional information

Melting/Freezing Temperature:Less than -20°C (<253 K) using BS4633: Method for the determination of Crystallizing Point, designed to be compatible with Method A1 Melting/Freezing Temperature of Commission Regulation (EC) N°440/2008 of 30 May 2008 and Method 102 of the OECD Guidelines for Testing of Chemicals, 27 July 1995.