What must be done specifically when storing solvents that contain more than 24% chlorinated materials?

• A. They must be kept in unmarked containers
• B. They must be stored at low temperature
• C. They must be heated before storage
• D. They must be kept in specifically marked containers

Answer: (D)

When solvents contain more than 24% chlorinated materials, clear labeling on their containers is required. This signaling communicates the specific presence of chlorinated solvents, their hazards, and any special handling and storage precautions. Marked containers help workers choose appropriate PPE, keep incompatible materials apart, and guide emergency responders in spills or exposures. Unmarked containers obscure risk, which can lead to improper handling; adjusting temperature or heating the contents before storage isn’t a standard safety requirement and can introduce additional risks. Keeping the solvents in specifically marked containers ensures proper identification and regulatory compliance.