Not all disinfectants have the same __________.

• A. Color
• B. Price
• C. Concentration
• D. Odor

Answer: (C)

Disinfectants differ in how strong they are because of their concentration—the amount of active ingredient present in the solution. The effectiveness of a disinfectant hinges on using the product at the exact concentration specified on the label, along with the required contact time. Some products are ready-to-use, while others must be diluted, and using the wrong strength can mean the disinfectant won’t kill germs effectively or could pose safety risks. Color, price, and odor don’t tell you how well a disinfectant works; a product can be affordable or have a strong scent yet still be ineffective if not used at the correct concentration. Always follow the label for the proper concentration and contact time.