What is a primary focus of the TSCA regulations?

The correct answer is focused on the regulation of both new and existing chemicals, which is a fundamental aspect of the Toxic Substances Control Act (TSCA). TSCA was enacted in 1976 and is designed to ensure that the United States Environmental Protection Agency (EPA) has the authority to regulate the introduction of new chemicals into commerce and to assess and manage risks posed by both new chemicals and those already existing in the market.

The emphasis on regulating both categories is crucial because it allows the EPA to evaluate potential health and environmental risks associated with various substances before they are used in manufacturing or other applications. This proactive approach is vital for protecting public health and the environment from harmful chemical exposures. Furthermore, TSCA provides a framework for requiring chemical manufacturers to provide information on the health and environmental risks of their products and facilitates action to limit or regulate those substances if necessary.

In contrast, other answer choices do not encompass the primary focus of TSCA. For instance, promoting international chemical trade or encouraging organic materials in manufacturing does not specifically relate to the TSCA's risk assessment and regulation of chemicals. Similarly, while standardizing global chemical policies may be a goal in various contexts, it is not the central aim of TSCA, which specifically addresses the regulation of chemical substances