Skincare that makes sense. See what's really in your products — in plain English.

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For informational purposes only — not medical advice. Always consult a dermatologist for skin concerns.

PHMB

1% line markerAI-analyzed

INCI: POLYAMINOPROPYL BIGUANIDE

preservative

What it does

A broad-spectrum preservative used to prevent the growth of bacteria, yeasts, and molds in cosmetic products, ensuring product safety and shelf life.

Skin Concerns

Beneficial for

acne

May aggravate

sensitivityeczema

Safety & Science

Safety summary

Considered safe for use in cosmetics at regulated concentrations (typically up to 0.3%). Some regulatory bodies have restricted its use due to potential for irritation or sensitization in certain applications, though it is widely used.

CAS Number

32289-58-0

1% line marker

This ingredient is commonly used as a marker to identify where ingredients drop below 1% concentration on the label.

Found In Products

Related Ingredients

At a Glance

INCI Name: POLYAMINOPROPYL BIGUANIDE
Common Name: PHMB
Functions: preservative
Products: 88 products
CAS Number: 32289-58-0

For informational purposes only. This is not medical advice. Always patch test new products and consult a dermatologist for skin concerns.

PHMB — Skincare Ingredient Guide — Dermasift — Dermasift