Reaction mass of Ammonium bisethanedioato bisaquo niobate(V) (anhydrous form) and Ammonium hydrogen ethanedioate ethanedioic acid (anhydrous form)

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-flammability

Type of information:

experimental study

Adequacy of study:

key study

Study period:

16 - 19 Oct 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP - guideline study

Qualifier:

according to guideline

Guideline:

other: UN-Test N.4 (Bowes-Cameron-Cage Test)

GLP compliance:

yes (incl. QA statement)

Remarks:

Hessisches Ministerium für Umwelt, Energie, Landwirtschaft und Verbraucherschutz, Wiesbaden, Germany

Auto-ignition temperature:

> 140 °C

Atm. press.:

ca. 1 013 hPa

Remarks on result:

other:

Relative self-ignition temperature:

> 140 °C

Remarks on result:

other:

Remarks:

at atm. press. of ca.1013.0 hPa

No exothermic effect has been observed at an oven temperature of 140 °C for 72 h. The sample needed more than 42 h to reach the oven temperature due endothermic effects. After the measurement the mesh wire basket contained approximately 10 vol.% and 25 wt.%, respectively, less sample than at the start. After the test the test item was discoloured to light beige (original colour: white).

The temperature of the test item did not exceed 200 °C during the whole test.

Due to the negative result at 140 °C no further tests are necessary.

The test item is not classified in Division 4.2 (self-heating substances) due to the fact that a negative result was obtained by the test. using a 10 cm sample cube at 140 °C.

Description of key information

not self-heating (UN RTDG N4)

Additional information

The relative self-ignition temperature / auto-ignition temperature is determined using UN RTDG N.4. The test item does not need to be classified, as no self-heating was observed in a 100 mm sample cube at 140 °C.