How should kerosene be diluted for lice control? - briefly
Mix one part kerosene with nine parts water (approximately a 1:10 ratio) to create a usable solution for lice treatment. Apply the mixture to the scalp, let it act for a few minutes, then rinse thoroughly and wash the hair with shampoo.
How should kerosene be diluted for lice control? - in detail
Kerosene can be used as a contact insecticide against head‑lice when mixed with a carrier oil or water to reduce toxicity and improve spreadability. The recommended dilution is typically a 1 % to 2 % solution by volume, achieved by adding 10–20 ml of pure kerosene to 1 liter of a non‑ionic surfactant solution (e.g., mild shampoo) or to 1 liter of mineral oil. This concentration is sufficient to immobilize lice while minimizing skin irritation.
Preparation steps
- Measure the exact volume of kerosene with a calibrated syringe.
- Combine the measured kerosene with the chosen diluent in a clean, sealable container.
- Mix vigorously for 30 seconds to ensure uniform distribution.
- Allow the mixture to stand for 5 minutes to let any bubbles dissipate.
Application guidelines
- Apply the diluted solution to dry hair, focusing on the scalp and behind the ears.
- Use a fine‑tooth comb to distribute the liquid evenly through each strand.
- Leave the preparation on for 15–20 minutes; do not exceed 30 minutes to avoid excessive exposure.
- Rinse thoroughly with lukewarm water and a mild, fragrance‑free shampoo.
Safety precautions
- Perform a patch test on a small skin area 24 hours before full application.
- Wear disposable gloves to prevent direct hand contact.
- Keep the mixture away from open flames and hot surfaces; kerosene remains flammable even when diluted.
- Store any remaining solution in a tightly sealed, clearly labeled container out of reach of children and pets.
Disposal
- Dispose of unused mixture by diluting further with water and adding a biodegradable detergent, then pour down a sanitary drain.
- Clean all equipment with soap and water; discard single‑use items in accordance with local hazardous‑waste regulations.
Adhering to the specified concentration, thorough mixing, and strict safety measures ensures effective lice control while reducing the risk of adverse reactions.