Sodium 3,5,5-trimethylhexanoate

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.16 (Relative Self-Ignition Temperature for Solids)

Deviations:

no

GLP compliance:

no

Specific details on test material used for the study:

Name: Potassium 3,5,5-trimethylhexanoate
CAS No.: 93918-10-6
Batch No.: PURS151015
Purity: 99.4%
Physical State: solid
Colour: white
Molecular Weight: 196.33 g/mol
Storage Conditions: room temperature
Re-certification Date: 14 October 2016

Key result

Relative self-ignition temperature:

> 400 °C

Remarks on result:

no self ignition observed under the test conditions

The relative self-ignition temperature for solids is determined according to the test method A.16. "Relative self-ignition temperature for solids" as described in the Council Regulation (EC) No 440/2008. A certain volume of the substance under test is placed in an oven at room temperature; the temperature/time curve relating to conditions in the center of the sample is recorded while the temperature of the oven is increased to 400 °C, or to the melting point if lower, at a rate of 0.5 °C/min. For the purpose of this test, the temperature of the oven at which the sample temperature reaches 400 °C by self-heating is called the self-ignition temperature.

A cube is filled with the substance to be tested and is tapped gently, adding more of the substance until the cube is completely full. The cube is then positioned in the center of the oven at room temperature. One thermocouple is placed at the center of the cube and the other between the cube and the oven wall to record the oven temperature.

The temperatures of the oven and sample are continuously recorded while the temperature of the oven is increased to 400 °C, or to the melting point if lower, at a rate of 0.5 °C/min.

When the substance ignites the sample thermocouple will show a very sharp temperature rise above the oven temperature. The practical procedure is described according to the in-house test method (S)23N09001.01.

The test item Potassium 3,5,5-trimethylhexanoate does not reach 400 °C by self-heating. Therefore the test item has no Relative Self-Ignition Temperature according to the definition in the Council Regulation (EC) No 440/2008, method A. 16 that is pursuant to Regulation (EC) No 1907/2006.

Conclusions:

The test item Potassium 3,5,5-trimethylhexanoate does not reach 400 °C by self-heating. Therefore the test item has no Relative Self-Ignition Temperature according to the definition in the Council Regulation (EC) No 440/2008, method A. 16 that is pursuant to Regulation (EC) No 1907/2006.

Executive summary:

The test item Potassium 3,5,5-trimethylhexanoate does not reach 400 °C by self-heating. Therefore the test item has no Relative Self-Ignition Temperature according to the definition in the Council Regulation (EC) No 440/2008, method A. 16 that is pursuant to Regulation (EC) No 1907/2006.

Description of key information

The test item Potassium 3,5,5-trimethylhexanoate does not reach 400 °C by self-heating. Therefore the test item has no Relative Self-Ignition Temperature

Additional information

Clearly, sodium and potassium 3,5,5-trimethylhexanoateare closely related, being the respective acid and salts. The only difference between the two substances is the alkali metal cation, which generally exhibit similar properties as a salt once associated with an acid, in this case3,5,5-trimethylhexanoic acid.They can therefore be considered together in terms of safety assessment and the K salt has been assessed as being a good read-across substance for the Na salt