**Phenoxyethanol: Cosmetic Preservative**
**Overview:**
Phenoxyethanol serves as a widely-used preservative in cosmetics and personal care products. Its effectiveness lies primarily against Gram-negative bacteria, and it is often employed in combination with other preservatives due to its weaker activity against yeast and mold.
**Key Characteristics:**
1. **Biocidal Properties:** Acts as a biocide, particularly effective against Gram-negative bacteria.
2. **pH Range:** Exhibits useful activity in the pH range of 3 to 10, offering versatility in formulation.
3. **Temperature Stability:** Stable up to 85°C (185°F), allowing for application in formulations subject to moderate heat.
4. **Solubility:** Soluble in most oils and water (0.5 to 2.67 grams per 100 grams of water). Miscible with propylene glycol and glycerin.
5. **Inactivation:** Inactivated by highly ethoxylated compounds. In surfactant solutions, it requires saturation for optimal activity.
6. **Fragrance Use:** Utilized in the fragrance industry for its solvent properties and pleasant floral aroma.
7. **Solvent Properties:** Excellent solvent for parabens and other preservatives.
**Application Tips:**
- **Combination Use:** Often combined with other preservatives to enhance its spectrum of activity.
- **Boosting Activity:** For increased efficacy against yeast and mold, consider combining Phenoxyethanol with Potassium Sorbate.
**INCI:** Phenoxyethanol
Phenoxyethanol's multifaceted characteristics make it a valuable ingredient in cosmetic formulations, contributing to both preservation and fragrance aspects.
Recommended use percentage: 0.25 - 1%
Appearance: Clear liquid
Odor: Floral, rose note