Butoxyethanol

What is Butoxyethanol?

Butoxyethanol, or 2-butoxyethanol, is a synthetic organic compound classified as a glycol ether. It results from combining ethylene oxide with butanol, yielding a clear, low-odor liquid with solvent properties. Primarily featured in nail polishes, hair sprays, and cleansing formulations, it excels at breaking down resins, dyes, and oils that resist water. This enables the creation of clear, stable solutions and emulsions. In viscosity control, it modulates flow for smooth dispensing and even spreading. As a fragrance component, it solubilizes essential oils and perfumes, ensuring consistent scent release, while also masking off-notes from other materials. Its chemical structure allows penetration into oily films, aiding cleaning without residue. Typically used at trace levels in rinse-off products.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 5 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Fragrance ingredient
Contributes scent character and/or masks base odors, shaping the overall sensory experience of the formula (subject to allergen and IFRA considerations).
Solvent
Dissolves and carries other ingredients, helping control viscosity, evaporation rate, and delivery of actives in both water- and oil-based systems.
Viscosity controlling agent
Adjusts thickness to the desired level for stability and usability, improving dispensing, suspension, and texture across many formulation types.
Masking
Reduces perception of unpleasant odors or tastes by neutralizing them or covering them with more acceptable sensory notes.

Benefits

Facilitates mixing of oils and resins for stable, uniform product textures.

Adjusts thickness to improve spreadability and application ease.

Stabilizes and disperses fragrances while covering base odors effectively.

Who It's For

A quick guide for who this ingredient may suit (and who should be cautious).

Who May Benefit Who Should Avoid
Users of nail polishes and hair styling aids needing quick-drying formulas.
People with sensitive or reactive skin prone to irritation.
Individuals preferring cleansers with efficient oil removal.
Individuals with eye sensitivity, as it may cause discomfort.
Those seeking products with consistent scent profiles.
Users concerned about ingredients with high hazard ratings from safety databases.

Safety Notes

  • EWG rates it high concern (5) due to potential skin and eye irritation.
  • Safe in cosmetics when formulated at low levels to minimize risks, per reviews.

Frequently Asked Questions about Butoxyethanol

What products commonly contain butoxyethanol?

Often found in nail polishes, hair sprays, and facial cleansers for its solvent properties.

Is butoxyethanol comedogenic?

No, it has a comedogenic rating of 0, meaning low risk of pore clogging.

Why the high EWG rating?

Due to concerns over irritation potential and use restrictions in some products.