SD Alcohol 38b

What is SD Alcohol 38b?

SD Alcohol 38-B consists of ethanol, a simple alcohol derived from fermentation or synthesis, denatured with specific additives like tert-butyl alcohol to render it unfit for consumption while safe for topical use. In cosmetics, it belongs to the solvent and astringent category, commonly found in toners, aftershaves, and clarifying lotions. Functionally, it rapidly evaporates upon skin application, dissolving oils and other ingredients to create lightweight formulas. As an astringent, it temporarily constricts surface proteins for a smoother feel. It also aids in adjusting product thickness and enhancing active delivery by controlling evaporation and penetration rates in water-based systems. This makes it ideal for oil-control products without leaving residue.

Comedogenic Rating 0/5 Low risk of clogging pores
EWG Safety Rating 3 View on EWG →

Roles in Formulation

This ingredient serves the following purposes in cosmetic formulations:

Astringent
Creates a temporary tightening and toning effect by contracting surface proteins, helping reduce the look of oiliness and refining feel on skin.
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

Provides a tightening sensation that refines skin texture temporarily.

Dissolves ingredients effectively for even application and quick drying.

Helps control product consistency for better spreadability and feel.

Who It's For

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

Who May Benefit Who Should Avoid
People with oily skin seeking a mattifying effect.
Individuals with dry or compromised skin barriers.
Those preferring lightweight, fast-absorbing formulas.
People experiencing irritation from alcohol-based products.
Users of toners or astringents for refreshed feel.
Those with sensitive skin prone to redness.

Safety Notes

  • Rated moderate concern by EWG due to potential irritation.
  • Generally recognized as safe for cosmetic use by regulatory reviews.

Frequently Asked Questions about SD Alcohol 38b

What is SD Alcohol 38-B?

A denatured form of ethanol used as a solvent and astringent in cosmetics for quick evaporation and toning.

Is it comedogenic?

It has a comedogenic rating of 0, meaning it does not clog pores.

Can it cause irritation?

It may irritate sensitive or dry skin due to its drying nature.