Isopropyl Alcohol

What is Isopropyl Alcohol?

Isopropyl alcohol is a synthetic, volatile liquid alcohol chemically known as 2-propanol, produced from propylene through hydration processes. It features a low boiling point and high evaporation rate, making it ideal for cosmetics like toners, cleansers, and hair products. Functionally, it dissolves lipophilic and hydrophilic substances, enabling clear solutions and even distribution of actives. This solvent property supports formulation stability in water- or oil-based systems. It also modifies viscosity to achieve desired flow and spreadability, enhances product dispensing, and prevents foam buildup during mixing or application for efficient production. In fragranced items, it disperses odor notes uniformly. Its astringent nature provides a temporary tightening sensation on skin, though prolonged contact may strip natural oils.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 2 View on EWG →
PubChem View on PubChem →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Antifoaming agent
Suppresses or breaks down foam during manufacturing or use, improving filling, mixing efficiency, and product performance where excessive foam is undesirable.
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.

Benefits

Dissolves diverse ingredients for uniform, stable cosmetic formulas.

Adjusts thickness for smooth application and better texture.

Suppresses foam to streamline manufacturing and improve usability.

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 with normal to oily skin preferring quick-drying products.
People with sensitive skin prone to stinging.
Those seeking lightweight toners or sprays for matte effects.
Those with dry or damaged skin barriers.
Individuals tolerant to alcohols in cleansing or styling items.
Anyone experiencing irritation from drying agents.

Safety Notes

  • Deemed safe for cosmetic use by regulatory reviews in typical concentrations.
  • Low overall hazard rating, though potential for dryness exists.

Frequently Asked Questions about Isopropyl Alcohol

What does isopropyl alcohol do in skincare products?

It acts as a solvent to mix ingredients, controls viscosity for better texture, and reduces foam during production.

Is isopropyl alcohol comedogenic?

No, it has a comedogenic rating of 0, unlikely to clog pores.

Is it suitable for sensitive skin?

Often unsuitable, as it can cause irritation or dryness in sensitive types.