Why should pesticides be stored away from incompatible materials and kept in closed containers?

• A. To ensure easier access during mixing.
• B. To minimize odor complaints from workers.
• C. To prevent chemical reactions, leaks, and cross-contamination with other chemicals.
• D. To comply with labeling only; storage method doesn't affect safety.

Answer: (C)

The essential idea is preventing dangerous interactions and leaks by isolating pesticides from materials they could react with and by keeping containers sealed. Pesticides can react with incompatible substances such as certain oxidizers, acids, bases, metals, or other chemicals. If they come into contact, these reactions can generate heat, gases, or even flames, potentially compromising container integrity and causing leaks, spills, or hazardous exposures. Keeping containers closed limits evaporation of volatile components, reduces release of odors, and minimizes worker exposure. Storing away from incompatible materials also prevents cross-contamination with other products or residues that could alter efficacy or create unsafe residues on equipment or in the environment.