Diammonium hexachloroiridate

Auto flammability

Link to relevant study record(s)

Reference

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:

other: GLP compliant, guideline study, available as unpublished report, acceptable without restrictions

Qualifier:

equivalent or similar to guideline

Guideline:

other: EC No 1272/2008 using modified N.4 (Self Heating Substances) of the United Nations Recommendations on the Transport of Danergous Goods, Manual of Tests and Criteria, fifth revised edition 2009

Deviations:

yes

Remarks:

the test item was only available in very limited amounts and was extremely expensive. Therefore, in order to obtain as much information as possible on the self-heating properties of the test item a modified procedure was employed.

Principles of method if other than guideline:

An aliquot of the test item was suspended in a stainless steel mesh cube (approximately 25 x 25 x 25 mm) in an oven. A thermocouple was placed in the centre of the sample and another in the oven. The oven was heated to 140°C and held at this temperature for a period of 24 hours. The temperature of the oven and the sample were continuously monitored over the 24 hour period. After this period the oven temperature was increased from 140 to 400°C at a rate of 30°C/hour. The temperature of the oven and the sample were continuously monitored throughout.

GLP compliance:

yes (incl. QA statement)

Relative self-ignition temperature:

> 400 °C

Remarks on result:

no self ignition observed under the test conditions

Remarks:

there were no signs of self-ignition or self heating over the duration of the test (apart from a small incidence of self-heating (of approx 52°D) after the test item had been at 400°C for approx 3 hours

Diammonium hexachloroiridate showed no signs of self-ignition or self-heating over the duration of the test (apart from a small incidence of self-heating (approximately 52°C) after the test item had been at 400°C for approximately 3 hours).

Conclusions:

Diammonium hexachloroiridate showed no signs of self-ignition or self-heating over the duration of the test (apart from a small incidence of self-heating of approximately 52°C after the test item had been at 400°C for approximately 3 hours).

Executive summary:

Diammonium hexachloroiridate showed no signs of self-ignition or self-heating over the duration of the test (apart from a small incidence of self-heating after the test item had been at 400°C for approximately 3 hours). This is a GLP compliant, guideline study considered suitable for use as the key study for this endpoint.

Description of key information

Diammonium hexachloroiridate showed no signs of self ignition or self heating over the duration of the test (apart from a small incidence of self-heating after the test item had been at 400°C for approximately 3 hours).

Additional information

Data are from a GLP compliant study following a modified N4 method, adapted to reduce the amount of test item required, and is considered suitable for use as the key study for this endpoint (Harlan 2011). Diammonium hexachloroiridate showed no signs of self-ignition or self-heating over the duration of the test (apart from a small incidence of self-heating (of approximately 52°C) after the test item had been at 400°C for approximatley 3 hours).