Unidentified chemical waste can be disposed together with the other unidentified chemical waste.

• A. True
• B. False
• C. Not sure
• D. Not applicable

Answer: (B)

Unidentified chemical waste must be treated with caution and kept separate from other wastes. Since the hazards, compatibility, and reactivity of unknowns are not known, mixing them with other unidentified wastes or with known wastes can trigger unexpected chemical reactions, release toxic fumes, or complicate disposal and regulatory compliance. The proper practice is to collect unknown wastes in clearly labeled containers and store them separately until analysis and hazard assessment determine the correct disposal stream. Only after identification and proper characterization should they be combined with the appropriate waste type.