Which amendment enhanced the ability to track the toxic effects of chemical substances?

The Registry of Toxic Effects of Chemical Substances (RTECS) plays a crucial role in enhancing the ability to track the toxic effects of chemical substances. It is a comprehensive database that provides information on the toxic properties, exposure limits, and health effects of thousands of chemical substances, making it an essential tool for researchers, public health officials, and regulatory agencies.

By compiling data from various sources, including scientific literature and toxicological studies, RTECS enables users to access vital information that can inform safety practices and regulatory decisions. This tracking capability is essential for monitoring the potential risks associated with chemical exposure and for protecting public health.

The other options, while related to chemical safety and health, do not specifically focus on creating a system or resource that tracks the toxic effects of chemical substances as comprehensively as RTECS does. The National Toxics Substances Control Act and others serve important purposes in chemical regulation and safety, but they do not offer the same depth of tracking capability regarding toxicity as RTECS.