Ingredient review

Aluminum Chlorohydrex PEG

INCI: Aluminum Chlorohydrex PEG

A common antiperspirant active that effectively reduces sweat but may cause irritation for sensitive skin and has ongoing safety discussions.

beautypersonal careantiperspirant

In plain English

Aluminum Chlorohydrex PEG is a modified aluminum salt used in antiperspirants. When applied, it dissolves in sweat and forms a temporary gel-like plug inside the sweat duct, which physically blocks sweat from reaching the skin's surface. The 'PEG' part helps the ingredient spread more evenly and reduces irritation compared to basic aluminum chlorohydrate. It is not a deodorant—it does not mask or prevent odor, it stops sweat at the source.

Quick decision guide

Useful, but context matters

Aluminum Chlorohydrex PEG can be useful, but watch for some irritation potential.

Plain-English read

Treat this as a practical screening step before you compare products that contain this ingredient.

  1. Step 1Start with the score, then check the irritation and clogging risk before judging Aluminum Chlorohydrex PEG.
  2. Step 2Use the "Best for" and "Use caution if" sections to match the ingredient to your skin, not just to a marketing claim.
  3. Step 3If a product stings, breaks you out, or worsens irritation, judge the finished formula and stop using it even if the ingredient scores well.

Score terms in plain English

Irritation risk

moderate

Can bother some users, especially with frequent use, damaged skin, or strong companion ingredients.

Clogging risk

low

Less likely to feel heavy or contribute to clogged pores for most skin types.

Evidence level

strong

There is a stronger practical or research basis for the ingredient role described here.

What it is

A synthetic aluminum salt complexed with polyethylene glycol (PEG) to improve stability and skin feel. It is the active ingredient in many clinical-strength antiperspirants.

How it works

When applied to the underarm, the aluminum ions dissolve in sweat and form a temporary gel plug within the sweat duct. This plug physically blocks sweat release. The effect is not permanent—the plug is naturally shed over days as skin cells turn over.

Pros

Highly effective sweat reduction

Aluminum Chlorohydrex PEG is one of the most effective antiperspirant actives available, reducing sweat by up to 50–70% in clinical studies.

Improved skin feel with PEG

The PEG modification helps the ingredient spread more smoothly and may reduce the stinging or irritation that some people experience with basic aluminum chlorohydrate.

Cons and cautions

Potential skin irritation

Even with PEG, this ingredient can cause redness, itching, or a burning sensation, especially on freshly shaved or broken skin.

Stains and residue

It can leave white marks on dark clothing and yellow stains on light fabrics due to reaction with sweat and laundry detergents.

Best for

  • People who experience heavy sweating and want reliable wetness protection
  • Those who prefer a clinical-strength antiperspirant for special occasions or daily use

Use caution if

  • Individuals with sensitive skin or a history of allergic contact dermatitis to aluminum compounds
  • People who prefer aluminum-free or natural deodorant options

Usage tips

Apply to completely dry skin at night for best absorption and reduced irritation.
Avoid applying immediately after shaving or to broken skin.
If irritation occurs, reduce frequency or switch to an aluminum-free deodorant for a few days.

Safety summary

Aluminum Chlorohydrex PEG is generally recognized as safe for topical use in antiperspirants by major health authorities. Some individuals may experience skin irritation. Long-term safety debates exist but are not supported by conclusive evidence linking aluminum in antiperspirants to breast cancer or Alzheimer's disease.

Research notes

Clinical studies confirm its efficacy in reducing sweat production. Safety reviews by the FDA, SCCS (EU), and WHO have not established a causal link between aluminum in antiperspirants and chronic diseases. Ongoing research continues to monitor potential health effects.

Common label clues

Typical concentration
10–25% in over-the-counter antiperspirant products
Regulatory status
Approved as an OTC antiperspirant active ingredient by the U.S. FDA. In the EU, it is listed as a permitted antiperspirant agent under cosmetic regulations.
Common uses
Antiperspirants, Deodorants
Environmental note
Aluminum mining has environmental impacts, and PEG compounds are derived from petroleum. However, the quantities used in personal care are small relative to industrial use.

Good to know

  • Aluminum Chlorohydrex PEG is considered safe by the FDA for use in OTC antiperspirants at concentrations up to 25%.
  • The International Agency for Research on Cancer (IARC) has not classified aluminum compounds as carcinogens.
  • Some studies have linked long-term aluminum exposure to Alzheimer's disease, but major health organizations (WHO, FDA) state there is no conclusive evidence.

Common questions

What is Aluminum Chlorohydrex PEG in beauty products?

Aluminum Chlorohydrex PEG is a modified aluminum salt used in antiperspirants. When applied, it dissolves in sweat and forms a temporary gel-like plug inside the sweat duct, which physically blocks sweat from reaching the skin's surface. The 'PEG' part helps the ingredient spread more evenly and reduces irritation compared to basic aluminum chlorohydrate. It is not a deodorant—it does not mask or prevent odor, it stops sweat at the source.

What does Aluminum Chlorohydrex PEG do in a beauty product?

When applied to the underarm, the aluminum ions dissolve in sweat and form a temporary gel plug within the sweat duct. This plug physically blocks sweat release. The effect is not permanent—the plug is naturally shed over days as skin cells turn over.

Is Aluminum Chlorohydrex PEG safe for most people?

Aluminum Chlorohydrex PEG is generally recognized as safe for topical use in antiperspirants by major health authorities. Some individuals may experience skin irritation. Long-term safety debates exist but are not supported by conclusive evidence linking aluminum in antiperspirants to breast cancer or Alzheimer's disease.

Who should be careful with Aluminum Chlorohydrex PEG?

Individuals with sensitive skin or a history of allergic contact dermatitis to aluminum compounds People who prefer aluminum-free or natural deodorant options

Research sources

FDA - Antiperspirant Drug Products for Over-the-Counter Human UseOpenSCCS Opinion on Aluminum Compounds in Cosmetic ProductsOpenPubMed - Aluminum and Alzheimer's Disease: A ReviewOpen

Ingredient reviews are educational and are not medical advice. Patch test new products and ask a licensed clinician about persistent irritation, allergies, pregnancy-specific questions, or diagnosed skin conditions.