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Diss Factsheets

Administrative data

Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)

Data source

Reference
Title:
Unnamed
Year:
2022
Report date:
2022

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
Version / remarks:
1
Deviations:
not specified
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
sodium 2-amino-3-carboxypropanoate
Cas Number:
323194-76-9
Molecular formula:
C4H7NO4.xNa
IUPAC Name:
sodium 2-amino-3-carboxypropanoate
Test material form:
solid: particulate/powder
Details on test material:
Name: L-aspartic acid, sodium salt monohydrate 1
Batch/Lot number: Z201125/ VG29848563
CAS number: 323194-76-9
Anhydrous substance name: L-aspartic acid, sodium salt, CAS: 17090-93-6
Appearance: Solid, white, crystalline powder
Purity: 98%
Expiry date: 24 November 2022
Storage conditions: Room temperature (15-25 ºC), protected from humidity (tight closed
container)

Results and discussion

Relative self-ignition temperature (solids)
Key result
Relative self-ignition temperature:
ca. 330 °C

Applicant's summary and conclusion

Conclusions:
Relative self-ignition temperature of Aspartic Acid Sodium Salt Monohydrate – min. 98% - ADCF (L-Aspartic acid monosodium salt monohydrate) is 330 °C
in accordance with test EC A.16 criteria.

Executive summary:

Relative self-ignition temperature of Aspartic Acid Sodium Salt Monohydrate – min. 98% - ADCF (L-Aspartic acid monosodium salt monohydrate) is 330 °C
in accordance with test EC A.16 criteria.


Relative self-ignition temperature was performed according to Standard Operating Procedure No. SPO/BC/12/b (edition 5) which corresponds to method EC A.16 Relative self-ignition temperature for solids [1].


The method is to place 8 cm3 of the solid substance in the oven at room temperature;
the temperature / time curve relating to condition in the centre 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 of stainless steel wire mesh with 0.045 mm openings was filled with the substance (about 8 cm3) to be tested and tapped gently, adding more of the substance until the cube was completely filled. Then the cube was suspended in the centre of the laboratory oven (volume about 2 liters) at room temperature. One thermocouple was placed at the centre 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 were continuously recorded while
the temperature of the oven was increased to 400 °C, or to the melting point if lower, at a rate of 0.5 °C/min.