PDI Plus Liquid is highly effective against Gram-negative and Gram-positive bacteria, yeasts and molds and is stable and effective in the pH range of 3-9. A powerful, paraben-free preservative system, PDI Plus Liquid is easy to handle, does not change the appearance, odor or viscosity of the final cosmetic product and provides maximum antimicrobial activity at very low use levels. PDI Plus Liquid is very soluble in propylene glycol, soluble in water, slightly soluble in glycerin and ethanol and insoluble in mineral oil. It's compatible with most common personal care ingredients and works well in hair care, skin care, body care and decorative cosmetics formulations.