Preservative – Phenoxyethanol + CG, also known as Optiphen, is a broad-spectrum preservative for activity against mold, bacteria and yeast. It is effective between a pH of 4 - 8.Why People Use This Product: To prevent bacteria, mold and fungal growth in products. Popular Products That Use This Ingredient: Hair Care. Lotions. Creams. Scrubs. Interesting Facts: Paraben Free. Formaldehyde Free. Manufacturing Temperatures: No Higher than 176ºF Formula pH: Between 4 to 8 Effective Against: Bacteria, Mold, Yeast Country Of Origin: United States