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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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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:
guideline study
Qualifier:
equivalent or similar to guideline
Guideline:
other: Test N.4 of the United Nations Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, fifth revised edition 2009
Deviations:
yes
Remarks:
Test N4 uses a large amount of test item, however the test item was only available in very limited amounts and was extremely expensive. A modified procedure was employed
GLP compliance:
yes (incl. QA statement)
Remarks on result:
no self ignition observed under the test conditions

Rhodium trihydroxide showed no signs of self-ignition or self-heating when held at 140 °C for 24 hours. Additionally, when heated from 140 to 400 °C, the sample temperature did not exceed the oven temperature by greater than 60 °C.

Conclusions:
Rhodium trihydroxide showed no signs of self-ignition or self-heating when held at 140°C for 24 hours. Additionally, when heated from 140 to 400°C, the sample temperature did not exceed the oven temperature by greater than 60°C.
Executive summary:

Walker and White (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.

Rhodium trihydroxide showed no signs of self-ignition or self-heating when held at 140°C for 24 hours. Additionally, when heated from 140 to 400°C, the sample temperature did not exceed the oven temperature by greater than 60°C.

Description of key information

Rhodium trihydroxide showed no signs of self-ignition or self-heating when held at 140°C for 24 hours. Additionally, when heated from 140 to 400°C, the sample temperature did not exceed the oven temperature by greater than 60°C.

Key value for chemical safety assessment

Additional information

Walker and White (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.

Rhodium trihydroxide showed no signs of self-ignition or self-heating when held at 140°C for 24 hours. Additionally, when heated from 140 to 400°C, the sample temperature did not exceed the oven temperature by greater than 60°C.