Trisodium trihydrogen 5,5',5''-(1,3,5-triazine-2,4,6-triyltriimino)tris[5-sulphonatosalicylate]

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Link to relevant study record(s)

Reference

Reference 1

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Remarks:

Test procedure according to UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, 6th revised edition, 2015

Qualifier:

according to guideline

Guideline:

other: UN Manual of Tests and Criteria, Part III, N.4

Relative self-ignition temperature:

> 140 °C

Remarks on result:

other:

Remarks:

at atm. press. of ca.1013.0 hPa

After approximately 16 hours the test item reached a temperature of 138 °C. The maximum temperature of the test item was 139 °C. After approximately 48.5 hours the test was terminated.

Conclusions:

neither spontaneous ignition nor self-heating exceeding the oven temperature of 140°C was observed. Therefore, the substance has not to be classified as self-heating according to Regulation (EC) No 1272/2008.

Reference 2

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with national standard methods

Remarks:

VDI 2263, Part 1

Qualifier:

according to guideline

Guideline:

other: Directive VDI 2263, Part 1

Relative self-ignition temperature:

>= 210 °C

Remarks on result:

other: pure test substance

Remarks:

at atm. press. of ca.1013.0 hPa

Relative self-ignition temperature:

>= 220 °C

Remarks on result:

other: 1:1 mixture of test substance with Kieselguhr

Remarks:

at atm. press. of ca.1013.0 hPa

In the screening test according to Grewer with the pure product an exothermal effect was detected starting at 210 °C. A multistage reaction was observed which led to a maximum product temperature of more than 500 °C.

In the screening test with the kieselgur mixture (1:1) a weak exothermal effect was detected starting at 220 °C. A multistage reaction was observed which led to a maximum product temperature of more than 650 °C

Between 60 and 160 °C an endothermal effect was observed.

See figures 1 and 2 (attachment)

Conclusions:

Due to the results from the Grewer-Oven Test further studies are necessary to exclude or classify the substance as self-heating substance according to Regulation (EC) No 1272/2008.

Additional information

The self-heating in air was studied in a screening test according to Grewer (Grewer-Oven-Test, VDI 2263-1) with the pure test substance and a additionally with a1:1 kieselguhr mixture.

In this test with the pure product an exothermal effect was detected starting at 210 °C. A multistage reaction was observed which led to a maximum product temperature of more than 500 °C. With the kieselgur mixture (1:1) a weak exothermal effect was detected starting at 220 °C. A multistage reaction was observed which led to a maximum product temperature of more than 650 °C.

Due to these results from the Grewer-Oven Test an UN N.4 test according to according to the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria was performed in order to exclude or classify the substance as self-heating substance according to Regulation (EC) No 1272/2008.

In this higher tier study the test item was placed in a cube-form sample container of stainless steel. wire netting (edge length 10 cm, defined mesh size: 0.053 mm) with their top surface open. The oven temperature was adjusted to the test temperature of 140°C.

After approximately 16 hours the test item reached a temperature of 138 °C. The maximum temperature of the test item was 139 °C. After approximately 48.5 hours the test was terminated.

Neither spontaneous ignition nor self-heating exceeding the oven temperature of 140°C was observed. Therefore, the substance has not to be classified as self-heating according to Regulation (EC) No 1272/2008.