Which of the following is NOT one of the OSHA physical hazards?

Cyanogen is not classified as an OSHA physical hazard. OSHA identifies specific categories of physical hazards that can pose dangers in the workplace. These commonly include compressed gases, organic peroxides, and water-reactive materials, all of which can lead to incidents such as explosions, fire, or chemical reactions under certain conditions.

Compressed gases can create pressure hazards, organic peroxides are highly reactive and can decompose violently, and water-reactive substances can release dangerous gases or heat when they come into contact with water.

In contrast, cyanogen, while it is a toxic and hazardous chemical, does not fall under the same classification of physical hazards by OSHA. Instead, it is primarily characterized as a health hazard due to its potential effects on human health rather than a physical risk in the way that the other options are categorized. Understanding the classifications of physical vs. health hazards is essential for compliance and safety in environments where hazardous materials are present.