Which resource is considered a free online option that provides numerous properties of chemicals?

CAMEO Chemicals is recognized as a free online resource that offers a comprehensive database of chemical properties and safety information. It provides essential details such as physical and chemical characteristics, potential hazards, and emergency response information for various substances. This resource is particularly valuable for professionals dealing with hazardous materials and for those in emergency response situations, as it aids in the tasks of assessing risks and making informed decisions regarding chemical safety.

In contrast, while the Toxic Release Inventory and the National Fire Protection Association offer important data and guidelines related to chemical hazards, they do not provide the specific in-depth properties of chemicals in the same manner as CAMEO Chemicals. Material Safety Data Sheets (MSDS), now known as Safety Data Sheets (SDS), are typically provided by manufacturers and are specific to individual products rather than a general database of chemical properties. Thus, CAMEO Chemicals stands out as a dedicated platform for accessing detailed chemical information freely and efficiently.