Aluminum-Free Underarm Spray Formula Review

Your proposed formula for an aluminum-free underarm spray contains several effective ingredients for odor control:

• Rhamnose: Known for its ability to inhibit odor-causing bacteria.
• SmellSorb (Zinc Ricinoleate): Works by absorbing and neutralizing odor molecules.
• Zinc PCA: Helps manage skin oiliness and has deodorant properties.
• LipidSoft Deo: A light emollient with deodorant action by inhibiting bacterial enzymes.
• Mild Preserved Eco: Acts as a preservative and helps control bacterial growth.
• Ethyl Alcohol: Serves as a solvent and aids in ingredient dispersion.
• Distilled Water: The base of the formula.

These components are well-suited for an aluminum-free deodorant product.

However, you asked if this formula can be mixed into a spray format, especially with the inclusion of an oil component (LipidSoft Deo) and SiliSolve Plus.

SiliSolve Plus is an emulsifier designed primarily for creating water-in-oil or water-in-silicone emulsions, which typically result in thicker textures like creams or serums. While it helps combine water and oil/silicone phases, it is not the ideal choice for formulating a low-viscosity spray where ingredients need to be fully dissolved or very finely dispersed in the liquid base.

LipidSoft Deo is an oil-soluble ingredient. Although it has some limited solubility in water, incorporating 3% into a predominantly water and alcohol spray base using an emulsifier designed for thicker emulsions (SiliSolve Plus) is likely to make it challenging to achieve a stable, clear, or easily sprayable liquid. The formula might separate or appear cloudy.

Therefore, while the ingredients are appropriate for an aluminum-free deodorant, the current formulation method and the choice of emulsifier (SiliSolve Plus) are not typically suitable for a spray format and could lead to instability or difficulty in mixing. To create a stable spray, ingredients usually need to be fully soluble in the base liquid, or a solubilizer/emulsifier specifically designed for clear or stable liquid sprays would be required to incorporate the oil phase effectively.

In conclusion, the ingredients are good for an aluminum-free deodorant, but the formula as written, particularly the emulsification system, is likely not suitable for a stable spray application.