Unlabeled Chemicals

An unknown chemical is any substance stored in an unlabeled container whose identity cannot be determined. Federal, state, and local regulations strictly prohibit transporting, storing, or disposing of wastes with unknown identities. Hazardous waste disposal companies also refuse to accept such materials without appropriate analysis. Identifying unknown chemicals is often time-consuming and expensive. These substances present significant legal and safety risks to the university. If an unknown’s identity cannot be determined, the DCHO will arrange for its removal from the department. However, EHS may charge the laboratory or the department a fee per bottle for analysis and identification of any unknown waste.

Take all possible steps to identify an unknown chemical, such as:

• Consult the PI about the type of work being conducted.
• Ask current researchers in the area if they recognize the container or its contents.
• Reach out to previous groups that used the area to see if they recall the identity of the waste.
• Perform simple tests, like checking the pH, to assist in identification
• Review ongoing projects for clues to the chemical’s identity.

Prevent the generation of unknown chemicals by:

• Labeling all containers properly. This should be done even when creating reagent solutions for temporary use. Labeling will also prevent the accidental use of the wrong material.
• Replacing fading or deteriorating labels.
• Requiring all workers to properly identify any unknown material before they leave the area or lab.