Fatty acids, C12-18 (even numbered)-methyl esters, sulfonated, sodium salts

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

28th March - 6th June 1994

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

study well documented, meets generally accepted scientific principles, acceptable for assessment

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

Commission Directive 92/69/EEC

Deviations:

yes

Remarks:

The test item was heated in a test tube rather than using a capillary tube.

Principles of method if other than guideline:

The test item is a waxy solid and capillary methods for determining the melting temperature were unsuitable. Instead, the melting temperature was determined by placing the a sample of the test item in a test tube, which was then heated in a silicone oil bath, and the test item observed for signs of melting.

GLP compliance:

yes (incl. QA statement)

Type of method:

other: Observation of melting whilst heating in a test tube.

Key result

Melting / freezing pt.:

> 162 - < 179 °C

Decomposition:

no

In the first test, the test item melted over the range 435 -445 K (162 - 172 °C). The test item colour changed from a faint yellow to darker yellow and light brown as it melted.

In the second test, the test item melted over the range 440 - 452 K (167 - 179 °C). The test item colour changed from faint yellow to a darker yellow as it melted.

Conclusions:

The test item melts in the range 162-179 deg C.

Executive summary:

In a study performed using a method similar to EU Method A.1, the test item was placed in a test tube, heated in a silicone oil bath and observed for signs of melting. The test was performed in duplicate. The melting range derived from both tests was reported as 435 -452 K (162 -179 °C). During the tests, the test item colour was observed to change from a fain yellow to dark yellow or brown as it melted.

Description of key information

The substance melts between162 and 179 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

162 °C

Additional information

In a study performed using a method similar to EU Method A.1, the test item melted between 162 and 179 °C.