Trisodium hydrogen ethylenediaminetetraacetate

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

18 May 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)

Qualifier:

according to guideline

Guideline:

other: VDI 2263, sheet 1 (1990)

GLP compliance:

yes (incl. QA statement)

Remarks:

Hess. Ministerium für Umwelt, Klimaschutz, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany

Specific details on test material used for the study:

Storage conditions: room temperature

Test procedure:

burning rate test: preliminary screening test

Remarks on result:

substance does not ignite and propagate combustion either by burning with flame or smouldering along 200 mm of the powder train within the 2 minutes test period

Results
Preliminary Test
The dried solid test item did not ignite at room temperature using a flame as ignition source being applied for at least 2 minutes.

Main Test
In the preliminary test the dried solid test item could not be ignited by a flame. Thus, the performance of the main test was not necessary.

Final Results

The dried solid test item ETA Lösung 181 / TRISODIUM EDTA SOLUTION 20% could not be ignited applying a flame as ignition source for at least 2 minutes.

The dried solid test item is classified as follows:

UN Transport Regulation:The dried solid test item does not have to be classifiedas readily combustible solid in class 4.1 according to the UN Transport Regulation.

GHS (CLP Regulation EC 1272/2008: Annex 1: 2.7): The dried solid test item does not have to be classifiedasflammable solid according to GHS / CLP Regulation EC 1272/2008 Annex 1: 2.7.

Reference 2

Endpoint:

self-heating substances / mixtures

Type of information:

experimental study

Adequacy of study:

key study

Study period:

05 Jun 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: UN Recommendations on the Transport of Dangerous Goods: Manual of Test and Criteria, rev. 6 (2015) and UN-Model Regulations, Rev. 20 (2017)

Qualifier:

according to guideline

Guideline:

other: VDI 2263, sheet 1 Grewer Oven (1990)

GLP compliance:

yes (incl. QA statement)

Remarks:

Hess. Ministerium für Umwelt, Klimaschutz, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany

Test procedure:

25 mm sample cube at 140°C

Max. temp. reached:

445

Result:

negative outcome (no effect observed)

Remarks on result:

other: Onset temperature of 230 °C in the Grewer Oven.

Results

Self-ignition in the Grewer Oven

In the investigation of self-ignition in the Grewer Oven for the pure test item an endothermic effect could be observed in the temperature range of 80 to 230 °C. An exothermic process was detected starting at 230 °C, which led to a maximum temperature of 445 °C (approx. 160 °C above the corresponding temperature of the reference material). A brown powder remained in the wire basket after the test.

Table1: Results of the screening test for self-ignition in the Grewer-Oven

Experiment	Onset self- ignition / °C	Maximum temperature / °C
Pure test item	Approx.230	445

Final Results/Classification

The pure dried solid test item ETA Lösung 181 / TRISODIUM EDTA SOLUTION 20% indicated self-ignition at atmospheric pressure starting at a temperature of 230 °C. Due to the high onset temperature in the Grewer Oven, it can be assumed that the UN Test N.4 using the 25 mm cube sample at 140 °C is negative.

On the basis to the results of the tests on theself-ignition in theGrewer Oventhe test item is classified as follows:

UN Transport Regulation: The dried solid test item does not have to be classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.

GHS/CLP Regulation1272/2008 Annex 1: 2.11: The test item does not have to be classified as self-heating substance according to GHS/CLP RegulationEC 1272/2008 Annex 1: 2.11, respectively.

Reference 3

Endpoint:

substances / mixtures which in contact with water emit flammable gases

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the experience in production or handling shows that the substance does not react with water, e.g. the substance is manufactured with water or washed with water

Reference 4

Endpoint:

pyrophoric solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days) and hence, the classification procedure does not need to be applied

Description of key information

Non-flammable.

Not self-heating.

No pyrophoricity.

No flammability on contact with water.

Key value for chemical safety assessment

Flammability:

not classified

Justification for classification or non-classification

The available data on flammability of the test substance do not meet the criteria for classification according to Regulation (EC) 1272/2008, and are therefore conclusive but not sufficient for classification:

The dried solid test item ETA Lösung 181 / TRISODIUM EDTA SOLUTION 20% could not be ignited applying a flame as ignition source for at least 2 minutes. The dried solid test item is not flammable on ignition.

The pure dried solid test item ETA Lösung 181 / TRISODIUM EDTA SOLUTION 20% indicated self-ignition at atmospheric pressure starting at a temperature of 230 °C. Due to the high onset temperature in the Grewer Oven, it can be assumed that the UN Test N.4 using the 25 mm cube sample at 140 °C is negative. The test item is not self-heating.

Based on the chemical structure and experience in handling and use, pyrophoricity and flammability on contact with water are not expected.