Phenoxyethanol

✦ Broad-spectrum preservative effective against bacteria, yeast, and mold when combined with boosters
✦ Globally approved for cosmetic use at up to 1% concentration in finished products
✦ Excellent alternative to parabens in clean beauty and sensitive skin formulations
✦ Stable across a wide pH range of 3 to 10, making it versatile for diverse product types
✦ Compatible with most surfactants, emulsifiers, proteins, and botanical extracts
✦ Low odor profile that does not interfere with fragrance design in finished cosmetics
✦ Water-soluble glycol ether that disperses easily in the water phase of emulsions

Phenoxyethanol is a glycol ether preservative that occurs naturally in green tea and chicory but is produced synthetically for cosmetic use. It has been used in personal care products since the 1950s and gained widespread popularity as consumer demand shifted away from paraben-based preservation systems. Today it is one of the most commonly listed preservatives on skincare and haircare ingredient labels worldwide.

What makes Phenoxyethanol particularly valuable to formulators is its reliable activity against gram-negative bacteria, including Pseudomonas aeruginosa, which is one of the most common contaminants in water-based cosmetics. While it has limited efficacy against mold on its own, it becomes a complete broad-spectrum system when paired with preservative boosters like Ethylhexylglycerin or Caprylyl Glycol, which enhance its antimicrobial reach without increasing the overall preservative load.

Rabibazaar supplies cosmetic-grade Phenoxyethanol suitable for DIY skincare formulators, professional cosmetic manufacturers, soap makers, and haircare product developers.

INCI Name : Phenoxyethanol
Chemical Name : 2-Phenoxyethanol
CAS Number : 122-99-6
Molecular Formula : C8H10O2
Appearance : Clear, slightly viscous colorless liquid
Odor : Faint aromatic, slightly rose-like
pH (1% solution) : 5.0 to 6.0 (neutral; does not significantly alter formulation pH)
Solubility : Soluble in water (2.6% at 20°C), fully miscible in ethanol and propylene glycol
Specific Gravity : 1.105 to 1.110 at 25°C
Flash Point : 121°C (250°F)
HLB Value : Not Applicable
Recommended Use Level : 0.5% to 1.0% (maximum 1.0% in EU)
Type : Synthetic preservative (glycol ether class)
Shelf Life : 24 to 36 months when stored sealed in original container

Skincare (Creams, Serums, Lotions) ★★★★★
Phenoxyethanol is the gold standard preservative for water-based skincare products including creams, serums, essences, and lotions. Add at 0.8% to 1.0% to the water phase or cool-down phase below 60°C for optimal efficacy.

Haircare (Shampoo, Conditioner, Masks) ★★★★☆
Works well in shampoos, conditioners, and hair masks, though high surfactant loads can slightly reduce its activity. Pair with Ethylhexylglycerin at 0.3% to 0.5% for complete preservation in rinse-off hair products.

Soap Making (Cold Process, Melt and Pour) ★★☆☆☆
Not effective in true cold process soap due to high pH saponification, but can be added to melt and pour bases at 0.8% to 1.0%. For cold process soap, preservation is generally unnecessary due to the alkaline environment.

Body Care (Scrubs, Butters, Balms) ★★★★☆
Excellent in water-containing body scrubs and emulsified body butters. Not required in anhydrous products like pure body balms or oil-only butters, as these do not support microbial growth.

Water-Based Cosmetics (Toners, Mists, Gels) ★★★★★
Absolutely essential in high-water formulations such as toners, facial mists, aloe gels, and micellar waters. Use at full 1.0% with a booster for these vulnerable product types.

In my formulation work, I never rely on Phenoxyethanol alone for full preservation. It is outstanding against bacteria, especially Pseudomonas, but it needs support against mold and fungal contamination. I always pair it with a secondary booster, and the combination I reach for most often is Phenoxyethanol at 0.9% plus Ethylhexylglycerin at 0.4%. This pairing passes challenge testing in nearly every water-based emulsion and serum format I have worked with.

ADVANCED TIP: When adding Phenoxyethanol to emulsions, pre-dissolve it in a small portion of warm water or propylene glycol at 40°C to 50°C before incorporating into the cool-down phase at below 60°C. This prevents localized concentration spots that can cause mild skin stinging in the finished product and ensures even distribution throughout the formulation.

Normal Skin : ★★★★★ — Well tolerated at recommended levels with no irritation concerns for healthy skin.
Dry Skin : ★★★★☆ — Safe and effective; does not contribute to dryness but offers no moisturizing benefit.
Oily Skin : ★★★★★ — Lightweight liquid form integrates seamlessly without adding oiliness or heaviness.
Combination : ★★★★★ — Performs consistently across varying skin zones without interaction concerns.
Sensitive Skin : ★★★☆☆ — Generally safe but some sensitive individuals may experience mild irritation at 1%; reduce to 0.7% and pair with a booster.
Mature Skin : ★★★★☆ — Safe for anti-aging formulations; does not interfere with active ingredients like retinol or peptides.
Acne-Prone : ★★★★☆ — Non-comedogenic and does not promote breakouts; essential for preserving water-based acne treatments.

CONCEPT 1: Hydrating Barrier Repair Cream
Usage Level : 1.0%
Key Ingredients: Cetearyl Alcohol, Ceramide NP, Niacinamide, Ethylhexylglycerin
Result : A rich yet fast-absorbing moisturizer with complete broad-spectrum preservation and skin barrier support.

CONCEPT 2: Brightening Vitamin C Toner
Usage Level : 0.9%
Key Ingredients: Sodium Ascorbyl Phosphate, Glycerin, Panthenol, Caprylyl Glycol
Result : A lightweight water-based toner with stable vitamin C delivery and reliable microbial protection.

CONCEPT 3: Gentle Micellar Cleansing Water
Usage Level : 1.0%
Key Ingredients: Polysorbate 20, Allantoin, Cucumber Extract, Ethylhexylglycerin
Result : A no-rinse micellar cleanser with effective preservation critical for high-water, low-surfactant formulations.

INCI Declared : Yes — must be declared at any concentration in EU
EU Cosmetics Reg : Permitted — Annex V/29, maximum 1.0% in finished product
Rinse-Off Limit : 1.0%
Leave-On Limit : 1.0%
Allergen Alert : No — not classified as a fragrance allergen
Skin Safety : Safe at recommended levels; patch test advised for sensitive individuals
Eye Area Use : Use with caution — may cause mild irritation in eye-area products at full concentration
Ingestion : Not for internal use
Pregnancy Use : Safe at cosmetic use levels up to 1.0%
Child Safety : Use with caution under 3 years; some regulatory bodies advise avoiding in leave-on products for infants
Ventilation : Recommended when handling bulk liquid
Storage : Cool dry place, away from direct sunlight, tightly sealed
Container : HDPE or PET recommended; glass acceptable; avoid reactive metals

⚠️ The Japanese Society of Pediatric Dermatology and some EU member states have raised caution about use in leave-on products for children under 3 years. Formulators targeting baby care should verify current local regulations and consider alternative preservation systems for this demographic.

Working pH Range : 3.0 to 10.0 (most effective between pH 4.0 and 8.0)
Heat Stability : Stable up to 80°C; however, best added at cool-down below 60°C to preserve full efficacy
Freeze-Thaw Stable : Yes
Emulsion Type : O/W, W/O, and single-phase aqueous systems
Emulsification Phase: Cool-down phase preferred; can be added to water phase if processed below 60°C
Compatible With : Ethylhexylglycerin, Caprylyl Glycol, most nonionic and anionic surfactants, glycols, botanical extracts
Incompatible With : High concentrations of certain nonionic surfactants (above 10%) can reduce efficacy through micelle entrapment; proteins at very high levels may bind and reduce available preservative
Oxidation Risk : Low — chemically stable glycol ether with no significant oxidation concerns
Discoloration Risk : None — remains colorless in formulation under normal conditions
Formulation Notes : Pre-dissolve in a small portion of propylene glycol or warm water before adding to batch. Always verify final preservation through challenge testing, especially in formulations with high botanical extract loads which can introduce microbial contamination.

Q: Can Phenoxyethanol preserve my product on its own without any other preservative?
A: It is effective against most bacteria on its own but has limited activity against mold and fungi. For complete broad-spectrum protection, pair it with a booster such as Ethylhexylglycerin at 0.3% to 0.5%.

Q: At what stage of formulation should I add Phenoxyethanol?
A: Add it during the cool-down phase when your emulsion temperature drops below 60°C. Pre-dissolving it in a small amount of propylene glycol or warm water helps it disperse evenly.

Q: Is Phenoxyethanol safe for baby care products?
A: It is permitted at up to 1.0% in most countries, but some regulatory advisories caution against use in leave-on products for children under 3 years. For infant-targeted products, consult current local regulations or consider alternative systems.

Q: Why does my product sting slightly when I use Phenoxyethanol at 1%?
A: Stinging can occur if Phenoxyethanol is not evenly distributed or if the formulation pH is very low. Reduce concentration to 0.7% to 0.8%, add a booster to compensate, and ensure thorough homogenization during manufacturing.

Q: How does Phenoxyethanol compare to Germall Plus as a preservative?
A: Phenoxyethanol is a single-compound preservative effective mainly against bacteria, requiring a booster for full spectrum coverage. Germall Plus is a pre-blended system containing Diazolidinyl Urea and Iodopropynyl Butylcarbamate that offers broader standalone coverage but is a formaldehyde releaser, which some consumers prefer to avoid.

Product evaluation

Review the specifications, supplied grade, intended use and compatibility of Phenoxyethanol before ordering for production. Test a small quantity in the actual application and document the result before scaling.

Quality control

Inspect the received batch for expected appearance, odor, texture, packaging condition and labeling. Keep supplier and batch records, use accurate measurements, and retain a reference sample when the material is used commercially.

Storage and responsible use

Store tightly closed in a clean, cool and dry location away from direct sunlight. Follow the current supplier instructions and all safety, labeling and regulatory requirements that apply to the intended finished product.