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Physical & Chemical properties

Appearance / physical state / colour

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Administrative data

Link to relevant study record(s)

Description of key information

The appearance of this test item is a black, grey or yellow solid (powder).

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
solid

Additional information

The appearance of slimes and sludges, precious metal refining was described as a black solid in a study report (Harlan 2010) which is considered reliable and acceptable for use as a key study. This is supported by data received from a member company, which are considered reliable. The company-provided data indicate that slimes and sludges, precious metal refining, is an odourless solid (powder), which is grey/dark grey (sometimes black) or yellow.