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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
Qualifier:
equivalent or similar to guideline
Guideline:
other: Modified method based on Regulation (EC) No. 1272/2008 of 16 December 2008, using a modified procedure of Test N.4 of the United Nations Recommendations of the Transport of Dangerous Goods, Manual of Tests and Criteria, 5th revised edition, 2009.
Deviations:
yes
Remarks:
UN N.4 Test uses large amount of test item. However, the test item was only available in very limited amounts and was extremely expensive, therefore a modified procedure was employed.
GLP compliance:
yes (incl. QA statement)
Relative self-ignition temperature:
180 °C
Remarks on result:
other: No signs of self-heating when the test item was held at 140°C for 24 h. Self-heating occurred at 180 °C when test item was heated from 140 to 400°C.

No signs of self-heating when the test item was held at 140°C for 24 h. Self-heating occurred at 180 °C when test item was heated from 140 to 400°C.

Conclusions:
Self-heating occurred at 180°C for rhodium acetate.
Executive summary:

Tremain and Atwal (2011) is a GLP compliant study following a modified UN N4 method and is considered suitable for use as the key study for this endpoint.

Self-heating occurred at 180°C for rhodium acetate.

Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Principles of method if other than guideline:
self–ignition capacity in an oven according to Grewer SOP SPZ- 126
GLP compliance:
not specified
Relative self-ignition temperature:
ca. 170 °C
Remarks on result:
other: from ca. 170°C exothermic behaviour with a max temp increase of ca. 165K observed
Remarks:
at atmospheric pressure

Dust explosion test also conducted in a modified Hartmann-apparatus. An ignition source was able to cause a strong dust explosion.

Conclusions:
The self-ignition temperature of Rhodium acetate is 170°C.
Executive summary:

This study follows a standard guideline and, although non-GLP, is considered acceptable and suitable for use as a key study for this endpoint.

The self-ignition temperature of rhodium acetate is 170°C.

Description of key information

The self-ignition temperature of rhodium acetate is 170°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
170 °C

Additional information

ATS (2001) follows a standard guideline and, although non-GLP, is considered acceptable and suitable for use as a key study for this endpoint. The self-ignition temperature of rhodium acetate was determined to be 170°C.

Tremain and Atwal (2011) is a GLP compliant study following a modified UN N$ method and is considered reliable and suitable for use as the key study for this endpoint. In this study the self-ignition temperature of rhodium acetate was determined to be 180°C.