Aluminium tri-sec-butanolate

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:

2013

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: OECD 102 study performed under GLP without deviations

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

GLP compliance:

yes (incl. QA statement)

Type of method:

capillary method

Melting / freezing pt.:

>= -50.9 - <= -39.9 °C

Atm. press.:

1 atm

Decomposition:

no

Sublimation:

no

Remarks on result:

other: Result reported as melting range

 Main Study

The aluminium block containing the test item was cooled down to < - 70 °C (– 79.2 °C first determination, -73.6 °C second determination). The block was left with insulation wrappings at room temperature to warm up until melting started. The temperature was noted at which the first signs of melting of the test item could be observed. When the substance was completely melted, the temperature was noted again.

A short piece of thin wire was used in order to detect melting. The temperature, at which the wire started to sink in the liquefying test item was recorded as begin of melting process. The end of melting process was recorded when the wire had fully moved into the test item.

The following values were recorded:

Melting point/range	Begin	End
First Determination	-50.9 °C (222.3 K)	-40.0 °C (233.2 K)
Second Determination	-50.8 °C (222.4 K)	-39.8 °C (233.4 K)

Conclusions:

Aluminium-tri-sec-butylated was determined having a melting range of -50.9 to -39.9 °C (222.4 to 233.3 K, estimated accuracy of ±0.2 °C)

Executive summary:

In two independant experiments the melting point of the test substance was measured and reported as average of determined values. Both measurements gave consistent results (difference less than 0.5 K) and a melting range was determined and recorded, with a range of 10.9 K.

Description of key information

Aluminium-tri-sec-butylate was determined having a melting range of -50.9 to -39.9 °C (222.4 to 233.3 K, estimated accuracy of ±0.2 °C). The upper value is taken forward for chemical safety assessment.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-39.9 °C

Additional information

In two independent experiments the melting point of the test substance was measured and reported as average of determined values. Both measurements gave consistent results (difference less than 0.5 K) and a melting range was determined and recorded, with a range of 10.9 K.