Cleaning & Disinfection, Knowledge Base

Surface Science – Disinfection and Residue Control

Posted on by Berkshire Corporation
      • What is the most common chemical cleaner used in cleanrooms?
        • a) Isopropyl alcohol (IPA) ✅Explanation: IPA is commonly used due to its low water content, rapid evaporation, and ability to clean residues from surfaces.
        • b) Chlorine bleach
        • c) Hydrogen peroxide
        • d) Phenolics
      • Why is residue control critical in cleanrooms?
        • a) Prevents corrosion
        • b) Ensures compliance
        • c) Avoids product contamination ✅Explanation: Chemical residues can compromise sensitive production environments.
        • d) Reduces cost
      • Which chemistry is safe for most electronics?
        • a) Quaternary ammonium
        • b) IPA ✅Explanation: IPA evaporates cleanly with low residue.
        • c) Phenolics
        • d) Chlorine
      • Which product is best for killing bacteria with minimal corrosive impact?
        • a) Hypochlorous acid ✅Explanation: Hypochlorous acid is effective yet material-friendly.
        • b) Peracetic acid
        • c) Hydrogen peroxide
        • d) Sodium hypochlorite
      • Which is a recommended method for applying disinfectants in cleanrooms?
        • a) Aerosol spraying
        • b) Dipping rags
        • c) Dry wipe + bucket
        • d) Presaturated wipes ✅
          Explanation: Presaturated wipes ensure consistent coverage and avoid oversaturation.
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