Alcohol-Free Disinfectant Gel/Spray: Ingredient Suitability and Usage

Based on the information available, here's a breakdown of the ingredients you asked about for creating an alcohol-free disinfectant gel or spray:

• Onion Extract (Hi-Quercetin®): The description for Hi-Quercetin® indicates its primary benefits are related to scar healing, wound healing, reducing inflammation, antioxidant effects, and anti-allergic properties. It is used in products like gels, serums, lotions, or creams for scar reduction. The information provided does not suggest that Onion Extract or Quercetin is effective as a disinfectant or germ-killing agent for general disinfection purposes in a gel or spray.

• Nano Silver Solution (500ppm): This ingredient is explicitly described as a germ-killer ("ฆ่าเชื้อโรค") and mentions its mechanism of action. For controlling/killing germs in cosmetic formulas, a usage rate of 5% of the 500ppm solution is recommended, which equates to 25ppm in the final formula. It is water-soluble and can be used in various formulas. This is a suitable option for an alcohol-free disinfectant.

• Chloroxylenol (PCMX): Chloroxylenol is a known disinfectant ingredient, also found in products like Dettol. The description states it can be used in all types of disinfectant products, including sprays and soaps. For killing Coronavirus, a rate of 0.12% is effective with a 30-second contact time, with a recommended usage of 0.2% for hand disinfectant products. Note that the 100% powder form dissolves in organic solvents and glycols, and a water-soluble liquid form is also available. The description advises caution when formulating with the powder form yourself for disinfection purposes and suggests a ready-made base might be preferable for household use to ensure effectiveness. This is also a suitable option for an alcohol-free disinfectant, provided the correct form and concentration are used.

In summary, for making an alcohol-free disinfectant gel or spray, Nano Silver Solution (500ppm) and Chloroxylenol (PCMX) are suitable options with recommended usage rates for germ-killing. Onion Extract (Hi-Quercetin®) is not indicated for this purpose based on its described properties.

Here are the recommended usage rates for disinfection:

• Nano Silver Solution (500ppm): 5% (resulting in 25ppm Nano Silver in the final product).
• Chloroxylenol (PCMX): 0.12% to 0.2% for killing Coronavirus (with 30 seconds contact time).

It is important to follow formulation guidelines and ensure proper dissolution and dispersion of the chosen ingredient to achieve effective disinfection.