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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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:
other: GLP-compliant, guideline study, available as unpublished report, acceptable without restrictions.
Qualifier:
equivalent or similar to guideline
Guideline:
other: N4 (Modified Method) Self Heating Substances
Deviations:
yes
Remarks:
modified method to minimise amount of test substance required.
Principles of method if other than guideline:
Self-heating was assessed using a modified test method based on UN test N4 and EU test A16, which is considered to produce equally robust results as the standard method but uses less volume of test substance. Due to the limited availability and high cost of the test material, which may not always be manufactured on a regular basis, this modified method was used.
GLP compliance:
yes (incl. QA statement)
Remarks on result:
no self ignition observed under the test conditions

There were no signs of self ignition or self-heating when the test item was held at 140 °C for 24 hours. Additionally, when the test item was heated from 140 to 400 °C, the same temperature did not exceed the oven temperature by greater than 60 °C.

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

This is a GLP-compliant, guideline study which is considered suitable for use as the key study for this endpoint. Self-heating was assessed using a modified test method based on UN test N4 and EU test A16, which is considered to produce equally robust results as the standard method but uses less volume of test substance. Due to the limited availability and high cost of the test material, which may not always be manufactured on a regular basis, this modified method was used.

Description of key information

Potassium dicyanoaurate showed  no signs of self ignition or self-heating when the test item was held at 140 °C for 24 hours. Additionally, when the test item was heated from 140 to 400 °C, the same temperature did not exceed the oven temperature by greater than 60 °C.

Key value for chemical safety assessment

Additional information

A GLP-compliant, guideline study is available for this endpoint (Harlan Laboratories 2011) and is considered suitable for use as the key study. Self-heating was assessed using a modified test method based on UN test N4 and EU test A16, which is considered to produce equally robust results as the standard method but uses less volume of test substance. Due to the limited availability and high cost of the test material, which may not always be manufactured on a regular basis, this modified method was used.