Potassium propionate

Auto flammability

Administrative data

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Reference

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

no guideline available

Principles of method if other than guideline:

- Principle of test: calorimetric investigation on the transition enthalpies and entropies of Li, Na, K, Rb, Cs propionates
- Short description of test conditions: A Perkin-Elmer differential scanning calorimeter Mod. DSC-2 was employed to measure the phase transition temperatures and enthalpies, and the heat capacities. For each salt 3 to 11 samples were DSC analyzed in the range from ~ 110 K up to the melt region, using sealed Al containers. A Wayne-Kerr autobalance precision bridge Mod. B 331 Mk II (frequency: 1592 Hz; conductance range: E-10 /E-02 - 2 Ohm - 1 ) in connection with a Gould Brush 500 XY plotter was used to continuously record the conductance of solid samples (in the form of pellets compressed between Ag electrodes) as a function of temperature.
- Parameters analysed / observed: Fusion temperature (TF) solid-solid transition temperature (Tsstr), enthalpy and entropy

GLP compliance:

no

Key result

Test procedure:

other: DSC

Remarks on result:

other: DSC result: TF = 638 K = 364,85°C, TsstrA= 352 K =78,85°C and TsstrB= 258 K = -15.15°C

Remarks:

Tsstr A and B are the solid-solid transitiontemperatures which are considered to result from changes in the crystalline structure, no weight loss was observed at these temperatures.

Interpretation of results:

not classified based on GHS criteria

Conclusions:

In the present publication of Ferloni et al. (1975) the thermal behaviour of alkanoates was investigated using DSC analysis. Potassium propionate showed two solid-solid transitions at -15.15 and 78.85°C. These transitions were not accompanied by any weight loss. The Fusion temperature was 364.85 °C corresponding to the melting point temperature. Potassium Propionate is considered to be thermically stable up to 364.85°C, no generation of fumes were reported at lower temperatures, thus, potassium propionate is not considered readily combustible according to Regualtion (EU) No. 1272/2008 (CLP) and the Globally Harmonized System for Classification and Labelling of Chemicals (GHS).

Data source

Reference

Reference Type:

publication

Title:

Phase Transitions in the Alkali C1— n C4 Alkanoates

Author:

P. Ferloni, M. Sanesi, and P. Franzosini

Year:

1975

Bibliographic source:

Z. Naturforsch. 30 a, 1447 — 1454 [1975]

Materials and methods

Test guideline

Qualifier:

no guideline available

Principles of method if other than guideline:

- Principle of test: calorimetric investigation on the transition enthalpies and entropies of Li, Na, K, Rb, Cs propionates
- Short description of test conditions: A Perkin-Elmer differential scanning calorimeter Mod. DSC-2 was employed to measure the phase transition temperatures and enthalpies, and the heat capacities. For each salt 3 to 11 samples were DSC analyzed in the range from ~ 110 K up to the melt region, using sealed Al containers. A Wayne-Kerr autobalance precision bridge Mod. B 331 Mk II (frequency: 1592 Hz; conductance range: E-10 /E-02 - 2 Ohm - 1 ) in connection with a Gould Brush 500 XY plotter was used to continuously record the conductance of solid samples (in the form of pellets compressed between Ag electrodes) as a function of temperature.
- Parameters analysed / observed: Fusion temperature (TF) solid-solid transition temperature (Tsstr), enthalpy and entropy

GLP compliance:

no

Test material

Test material information

Constituent 1

Reference substance name:

Potassium propionate

EC Number:

206-323-5

EC Name:

Potassium propionate

Cas Number:

327-62-8

Molecular formula:

C3H6O2.K

IUPAC Name:

potassium propionate

Test material form:

solid: particulate/powder

Results and discussion

Relative self-ignition temperature (solids)

Key result

Remarks on result:

no self ignition observed under the test conditions

Remarks:

Up to 364.85°C no self-ignition was reported