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Frequent Questions

Mixtures

A company manufactures many different compounds containing the metal magnesium, for example MgSO4, MgO, and MgCl2. Is each compound a reportable chemical substance or are they mixtures of magnesium? Should the amount of magnesium in each substance be aggregated and reported as the total amount of magnesium?
Are mixtures ever reportable?
Are mixtures listed on the TSCA Inventory?
How are catalysts reported under the Chemical Data Reporting (CDR) Rule?
How does a company report the importation of a solid solution?
If a company purchases chemical substances from manufacturers and then mixes it for their own use, do they need to report on the mixture?
Must hydrates of chemical substances be reported under the CDR rule?
When metal catalysts supported on fixed, inert substrates are regenerated, the catalyst is subjected to high temperatures which convert the metal to its oxide. This is followed by a reduction step which converts the metal oxide back to the base metal. Is this activity subject to CDR requirements?

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