Silver Shield Sanitizer, literally, disperses quadrillions of colloidal silver particles with every spray. It is safe to use on household surfaces, linens, clothing and skin. It also has a pleasant, uplifting scent and contains no fragrances (fragrance grade oils) -- we use only pure essential oils. You can use it in your car, at work, in your kitchen, in your bathroom, on household appliances, on electronics buttons and light switches. Silver Shield Sanitizer does not stain, or tarnish materials.