Why keep incompatible materials separate in storage?

• A. To prevent hazardous reactions
• B. To save space
• C. To speed up access
• D. To comply with color coding only

Answer: (A)

Keeping incompatible materials apart is about preventing hazardous reactions that can occur if they come into contact or if vapors mix. When substances that shouldn’t be together are stored together, a spill, container failure, or even moisture in the air can bring them into contact and trigger dangerous outcomes—heat buildup, fires, explosions, or release of toxic gases. For example, oxidizers near flammable liquids can ignite, acids near bases can generate corrosive heat and fumes, and water-sensitive materials can release flammable or toxic gases upon contact with moisture. By organizing storage into compatible groups, using secondary containment, dedicated or ventilation-friendly cabinets, and clear labeling, the risk of a small incident turning into a serious hazard is greatly reduced. Color coding or trying to save space alone doesn’t prevent these reactions; separation based on compatibility is the essential safety practice.