Potassium isooctadecanoate

Boiling point

Link to relevant study record(s)

Reference

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Deviations:

no

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

GLP compliance:

no

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Product description: Potassium isooctadecanoate/potassium isostearate
Name: Isooctadecanoic acid, potassium salt
CAS No.: 66469-15-6
Physical state: off white to yellowish solid at 20 °C
Batch No.: PFS-755-169
Re-certification date of batch: 12 December 2017
Purity: 100 % (UVCB)
pH, 10% in DI water 8.0 - 9.0
Stability: stable under test conditions
Storage condition of test material: Room temperature, protected from light

Key result

Boiling pt.:

>= 449 °C

Atm. press.:

994 mBar

Decomposition:

yes

Decomp. temp.:

>= 449 °C

The boiling temperature of the test item was determined in accordance with the test method OECD Guideline Test 103 “OECD Guideline For The Testing Of Chemicals, adopted by the Council on 27th July 1995, Boiling Point” (similar to the test method A.2. "Boiling temperature" as described in the Official Journal of the European Communities L383A)

The practical test performance was based on the in-house test procedure VTA(S)31X93002.02: "Boiling temperature determination(Tb) of solid and liquid substances by means of DSC".

To determine the boiling behaviour (three independent single measurements), the test item was measured by DSC between 5 °C and 550 °C with a heating rate of 10 K/min. For the measurement a partially capsulated crucible, typical for boiling point measurements, was used. The test item shows a boiling and/or thermal decomposition earliest at ca. 449 °C (at 994 mbar) according to the definition in the OECD guideline 103.

450 °C (from first measurement)

449 °C (from second measurement)

449 °C (from third measurement)

From 449 °C the test item shows a boiling and/or thermal decomposition with evaporation of the decomposition components.

The DSC measurements were confirmed by means of TGA measurements under the same measuring conditions.

Conclusions:

The test item shows a boiling and/or thermal decomposition earliest at ca. 449 °C (at 994 mbar) according to the definition in the OECD guideline 103.

Executive summary:

The test item shows a boiling and/or thermal decomposition earliest at ca. 449 °C (at 994 mbar) according to the definition in the OECD guideline 103.

Description of key information

The test item shows a boiling and/or thermal decomposition earliest at ca. 449 °C (at 994 mbar) according to the definition in the OECD guideline 103.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:

449 °C