Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Physical & Chemical properties

Appearance / physical state / colour

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Administrative data

Link to relevant study record(s)

Description of key information

Tellurium slags primarly consist of oxides of silicon, aluminium, calcium and iron, in a glass-like, mostly amorphous matrix. Tellurium slag solidifies from a reaction melt if the temperature drops below ca. 1100-1600°C. The slag is crushed and grains or lumps with sizes ranging from a few millimeters to several centimeters are obtained. Slag grains can be mixed with sand, which may be used for lining the reaction vessel and which then adheres to the cooled slag (ESIS).
Tellurium slag is a product of treating molten lead with sodium salts. Consists primarily of sodium-tellurium salts in various states of oxidation. No molecular formula is available for slags, tellurium. (U.S. EPA, substance registry service)

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:
solid

Additional information