Used to prevent bacteria, mold and fungal growth in aqueous formulations. Optiphen is a highly effective broad spectrum antimicrobial preservative. Effective at pH levels below 6.0. No formaldehyde donors. Paraben-free. Compatible with most raw materials. Contains sorbic acid which offers protection for anti-fungal and anti-mold activity. Please note that Optiphen Plus can thin out some formulas-proper testing should be done. Made in the USA. Popular Products That Use This Ingredient: Lotions. Creams. Not for Lips. Paraben Free. Formaldehyde Free. Manufacturing Temperatures: No Higher than 176ºF Formula pH: Best Below 6.0 Effective Against: Bacteria, Mold, Yeast DIRECTIONS: Slowly stir into liquids at a temperature below 176°F (80ºC). Common use levels for the oil are lotions and creams 0.75-1.5%. This product preserves water and oil based products with a pH below 6.0. TIPS: Performs best when formulation pH levels are below 6.0. The recommended usage rates are provided only as a guideline to provide proper preservation. Adding at end of emulsion when product is coolest gives best results. All new formulations should be tested to ensure preservative efficacy. STORAGE: Store in an airtight, cool, dark location. When stored properly, best used within 1 year from date of purchase. WARNING: Not approved for lip products. CAUTION: Keep out of reach of children and pets. Recommended usage rates are provided only as a guideline for proper preservation. All new formulations should be challenge tested to ensure preservative efficacy.