Why must incompatible items be segregated in storage?

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In storage safety, incompatible items must be segregated to prevent dangerous chemical or energetic reactions, accidental cross-contamination, and chain-reaction events if one item is damaged. When reactive materials share the same space, a spill, leak, or exposure to heat, impact, or moisture can trigger a violent reaction, release toxic gases, or cause a fire or explosion. Keeping oxidizers away from fuels, acids away from bases, reactive metals away from moisture, and peroxide formers away from organics reduces the chance of such events and helps contain any incident to a single material. This separation also prevents cross-contamination of containers or packaging that could alter a material’s stability or ignition properties. Space layout, lighting needs, or color schemes do not address these safety hazards, so segregation to prevent adverse chemical interactions is the essential reason for placing incompatible items apart.