Chemical compound records may include information in categories such as chemical & physical properties, drug & medication information, pharmacology & biochemistry, safety & hazards, and toxicity. Look for the Laboratory Chemical Safety Summary (LCSS) that many records include. The LCSS can include specific information on toxicity data & exposure limits, first aid, flammability & explosivity, storage & handling, cleanup & disposal, and more.

Records for chemical substances contain a variety of safety related information. Possible categories include chemical properties (vapor pressure, flash point), stability, toxicity, safety, first aid, incompatibility, personal protection, exposure route, and more. Actual data included varies depending on the substance.

Includes hazard and response information. Create a list of chemicals and see what hazards are likely to arise from mixing them. From NOAA.

Search for chemicals by name or registry number. Use the Advanced Search option to search using other identifiers or to search by type of hazard, use or exposure, or reason for concern. Read and agree to the ECHA legal notice before using the database.

From the U.S. National Institute of Standards and Technology. Among other properties, it contains thermochemical data useful in calculating reaction enthalpies.

Free software you can download and use to find out about the reactivity of thousands of compounds, compatibility of absorbents, and suitability of construction materials for chemical processes. Currently maintained by the Center for Chemical Process Safety.