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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
Remarks:
read-across on structural analogue
Adequacy of study:
key study
Study period:
From September 23,2008 to November 17,2008
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: GLP with certificate.The study is clear and complete in any parts. The substance is well identified, the methos is suitable for the substance. Result in read across based on grouping of substances
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
thermal analysis
Melting / freezing pt.:
>= -16.92 - <= 15.59 °C
Atm. press.:
ca. 1 atm
Decomposition:
no
Remarks on result:
other: Peak Temperture at 6.29°C

Melting point was calculated manually by interpretation of the curves either by determination of the intersection point between the baseline and the slope of the curve before the peak (Tel) or the temperature corresponding to highest value of the heat flow (Tp)

TESTS

Test 1 Test 2 Test 3
Temperature a) cool from 30°C to -30 at 1 °C/min
program b) heat from -30°C to 30 °C at 1°C/min
Sample weight (mg) 2.061 4.894 8.348

Determination

Toi 

Onset initial temperature

Tei        Initial extrapolated temperature  First melting with thermal past Tp   Peak temperature First melting with thermal past Tof                       Onset final temperature
1  -18.48°C -11.70 °c  +5.82 °C  + 16.08 °c
2  -13.81°C -8.57 °C + 6.69 °C  + 15.71 °C
3  -18.49°C -13.24 °c +6.37 °C  + 15.00 °C
Mean - 16.92 °C  -11.17°C +6.29 °c + 15.59 °C
Standard deviation  2.2 °C  1.9 °C  0.4 °C  0.4 °C

Range of melting point

Toi to Tof= -16.92°C to + 15.59 °c

Tei= - 11.17 °c

Tp= + 6.29 °c

Conclusions:
From -16.92°C to +15.59°C
Tp= +6.29°C
Executive summary:

The melting point of Fatty Acids C16 -C18 and C18 -unstd., Me esters has been measured according to Council Regulation (EC) No. 440/2008, Method A.1, by Thermal analysis (DSC)

Description of key information

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
6.29 °C

Additional information

The range of melting temperature goes from -16.92°C to +15.59°C at 1 atm