Dettol antiseptic liquid is a concentrated disinfectant that must be diluted with water before most uses. The active ingredient, chloroxylenol at 4.8%, kills bacteria on skin and surfaces, but using it undiluted can irritate or damage your skin. Here’s how to use it safely for first aid, cleaning, and laundry.
Wound Cleaning for Cuts and Stings
For minor cuts, grazes, insect bites, and stings, dilute one capful of Dettol in half a pint (about 300 ml) of water. If you’re mixing a larger batch, use 50 ml of Dettol per litre of water. Gently clean the area around the wound with the diluted solution using a clean cloth or cotton pad. Never apply Dettol directly to skin without diluting it first.
When you add Dettol to water, the clear brown liquid turns milky white. This is normal. The oils in the formula become suspended in the water, forming an emulsion that scatters light differently. If the mixture stays clear, you likely haven’t mixed it enough.
Who Should Avoid Using It on Skin
Do not use Dettol on eczema or similar skin conditions. The antiseptic can further irritate already compromised skin and make things worse. If you have broken, inflamed, or chronically dry skin beyond a simple cut, skip Dettol and use plain water or a product specifically recommended for sensitive skin.
Floor and Surface Disinfection
For mopping floors, add one capful of Dettol liquid to a full bucket of water. This lighter dilution is enough to disinfect hard floors without leaving a sticky residue. Mop as you normally would and let the floor air dry.
For kitchen counters, bathroom sinks, and other hard surfaces, you can apply a small amount of the diluted solution directly with a cloth or sponge, then wipe clean. There’s no need to rinse afterward on non-food-preparation surfaces, but wiping down counters where you prepare food with a damp cloth after disinfecting is a good habit.
Using Dettol in Laundry
Standard washing machine cycles below 40°C don’t always kill bacteria in fabrics, which is where a laundry sanitiser helps. Dettol makes a dedicated laundry sanitiser product for this purpose. You add it to the wash cycle alongside your regular detergent. The standard Dettol antiseptic liquid is designed for skin and surface use, so if laundry disinfection is your goal, the laundry-specific version is a better fit.
Keep It Away From Cats and Dogs
Dettol contains compounds in the phenol family, and these are genuinely dangerous to pets. Cats are especially sensitive. If a cat walks across a floor that was mopped with Dettol and hasn’t fully dried, the chemical can cause pain, redness, and ulcers on their paws. If a pet ingests even a small amount, symptoms include rapid breathing, tremors, twitching, and loss of coordination.
If your pet comes into contact with Dettol on their skin or fur, wash them immediately with liquid dish soap and contact a veterinarian. The practical rule: if you have cats or dogs, make sure any surface you’ve disinfected with Dettol is completely dry before your pet can access it. Better yet, keep pets out of the room entirely until the floor has dried.
Storage and Shelf Life
An unopened bottle of Dettol typically has a shelf life of about two years from the date of manufacture. Store it at room temperature, away from direct sunlight and extreme heat. Once opened, use it within a reasonable timeframe, as the active ingredient can gradually lose potency. Check the expiry date printed on the bottle, and if the liquid has changed color, separated, or smells different than usual, replace it.
Quick Reference for Dilution Ratios
- Wound cleaning: 1 capful per half pint of water (or 50 ml per litre)
- Floor mopping: 1 capful per bucket of water
- Hard surfaces: diluted solution applied with a cloth or sponge
The key principle across all uses: Dettol is a concentrate. Diluting it correctly makes it effective without being harsh on your skin or surfaces.