Prohibited and Hazardous Chemicals and Reactions

Prohibited Chemicals and Reactions in School Science Labs

Ensuring the safety of students, teachers, and staff in science laboratories is paramount. The use and handling of certain chemicals and the execution of specific reactions present significant risks and must be strictly regulated. The following list identifies prohibited chemicals and restricted reactions that pose unacceptable hazards in educational settings. Compliance with these guidelines is mandatory to prevent serious injury, health risks, and environmental hazards. The prohibited chemicals and reactions outlined below have been selected based on their toxicity, reactivity, flammability, or potential to cause dangerous chemical reactions. 

Immediate disposal and cessation of use are required for all substances and practices listed.

In addition to those chemicals designated as prohibited, many substances of a hazardous nature may be generated in the laboratory. Gases such as ozone (O3), plus gaseous forms of hydrogen chloride (HCl), or iodine (I2) are toxic and/or irritating products. Teachers should avoid producing these substances; but if they must be used or generated it is only acceptable in a properly operating fume hood.