SkinAtlas
Ingredient library / Hypochlorous Acid
Preservative ingredient

Hypochlorous Acid

INCI: HYPOCHLOROUS ACID

A weak acid naturally produced by white blood cells to fight infection. In skincare (notably Tower 28 SOS Spray) it is generated by electrolyzing saline; antimicrobial and calming with near-zero irritation.

Also known as: hocl, electrolyzed water

antimicrobialanti-inflammatory

Benefits

  • ✓Kills bacteria, fungi, and viruses on contact without disrupting the skin barrier
  • ✓Calms redness and post-acne inflammation
  • ✓Produced naturally by white blood cells — exceptional skin tolerance

Watch for

  • ⚠Can oxidize other actives in the same formula; usually formulated at low concentration

Compatibility

✓ Works well with
+ Sodium Chloride

In depth

What it does

A weak acid naturally produced by white blood cells to fight infection. In skincare (notably Tower 28 SOS Spray) it is generated by electrolyzing saline; antimicrobial and calming with near-zero irritation. As an preservative ingredient, it is particularly valued for kills bacteria, fungi, and viruses on contact without disrupting the skin barrier, calms redness and post-acne inflammation, and produced naturally by white blood cells — exceptional skin tolerance.

At a glance
CategoryPreservative
IrritancyLow–moderate
Beginner-friendlyYes
In your routine

Pairs well with Sodium Chloride.

Found in 0 products

Common questions

What ingredients work well with Hypochlorous Acid?

Hypochlorous Acid pairs particularly well with Sodium Chloride. These combinations are generally considered synergistic — they complement each other's effects without interfering or causing irritation.