Nano Silver Spray for Pets: Formulation Considerations

Creating a specific formulation for a nano silver spray for pets requires expertise in cosmetic or veterinary formulations, considering safety, efficacy, and stability. While I cannot provide a complete formula with exact percentages, I can offer information on relevant silver ingredients and general considerations based on the available product data.

Several types of silver ingredients are available that could potentially be used for their disinfecting properties:

• Nano Silver 20nm Powder: This is a dark gray powder form of nano silver. It has a long shelf life (8 years) but is insoluble and requires special dispersion techniques to be effectively incorporated into a liquid formula like a spray.
• Silver (2000ppm, Ionic, Colorless Solution, pH 4-6): This is a clear, colorless liquid solution of ionic silver (Silver Citrate, Citric Acid) suitable for formulas with a pH between 2 and 7. It is soluble in water and effective for disinfection. The recommended usage rate is typically 1-5% (or 40ppm in the final formula for disinfection). It has a shelf life of 2 years when refrigerated and needs protection from light and heat. It is not compatible with salts, electrolytes, or cationic surfactants.
• Silver (2000ppm, Ionic, Colorless Solution, pH 10-12): Similar to the above, this is a clear, colorless liquid ionic silver solution (Silver Citrate) but is suitable for formulas with a pH between 8 and 12. It shares similar usage rates (1-5%, recommended 40ppm), water solubility, and storage/compatibility considerations (refrigeration, protect from light/heat, avoid salts/electrolytes/cationic surfactants).
• Nano Silver (2000ppm, Colloidal, Yellow Solution): This is a clear, yellow liquid colloidal nano silver solution (Colloidal Silver) suitable for formulas with a pH between 6 and 12. It is also soluble in water and effective for disinfection, with a recommended usage rate of 1-5% (or 40ppm). It requires refrigeration for storage and protection from light and heat, and is not compatible with salts, electrolytes, or cationic surfactants.

Both the ionic and colloidal silver solutions are effective for killing germs and are generally suitable for "leave-on" products like sprays, as they are liquid and soluble in water.

Regarding Shelf Life:

The shelf life of the final spray product depends heavily on the specific ingredients used, their concentrations, the manufacturing process, and storage conditions. While the raw materials like Nano Silver Powder may have a long shelf life (8 years) and the ionic solutions have a stated shelf life (2 years when refrigerated), the stability of the final formulation needs to be tested. Storing the product in an opaque bottle is a good practice, as some forms of silver can be sensitive to light, which can affect their stability and efficacy over time. However, other factors like temperature, pH, and interactions with other ingredients also play a crucial role.

To ensure the safety and effectiveness of a spray for pets, especially for wound healing, it is highly recommended to consult with a formulator experienced in veterinary or dermo-cosmetic products. They can help develop a stable and safe formula with appropriate concentrations and conduct necessary stability and safety testing.