Ingredient Guide

Zinc Chloride

Also known as: Zinc Chloride, ZnCl2

All skin types

What It Is

An ionic zinc compound used in cosmetics as an antimicrobial, astringent, and follicle-supportive agent. Less common than zinc PCA or zinc oxide, but used in targeted hair and lash formulas.

What It Does

Provides zinc's antimicrobial and sebum-regulating benefits at the lash and brow follicle level, creating a cleaner follicle environment that may support healthier hair growth.

Best For

Lash and brow follicle environment supportAntimicrobial actionZinc delivery

Benefits

  • Delivers ionic zinc directly to the follicle area
  • Antimicrobial — may reduce bacteria around the follicle
  • Zinc's anti-inflammatory and sebum-regulating properties support a healthy follicle environment

When to Be Careful

  • At higher concentrations, zinc chloride can be irritating — regulated at cosmetic concentrations
  • More astringent than zinc PCA or zinc oxide in some formulations
ItGirlies Ingredient Intelligence
Why This Gets Hype

Zinc is well-established for scalp and hair health (zinc PCA, zinc pyrithione). Zinc chloride extends this logic to targeted lash and brow applications.

What People Often Misunderstand

Zinc chloride is not the same as zinc oxide (mineral SPF) or zinc PCA (oil control serum). They're different zinc compounds with different functions.

Best Routine Slot

Part of a lash/brow serum — applied at the lash line twice daily.

Good Match For

Myristoyl Pentapeptide-17, Biotinoyl Tripeptide-1

Proceed Carefully If…

If using on the brow area over very sensitive skin — may be mildly astringent.

Signs You May Be Overdoing It

Tightness or dryness at the brow area.

Commonly Found In

Lash serumsBrow serums

Products Containing Zinc Chloride

Multi-Peptide Lash and Brow Serum
The Ordinary

FAQs About Zinc Chloride

What does zinc chloride do in a lash serum?
It provides zinc's antimicrobial and follicle-supportive effects in an ionic form that delivers directly to the lash and brow area, supporting a healthier follicle environment.
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