What should you not use hypochlorous acid with?

Hypochlorous acid (HOCl) is a mild and effective disinfectant, but it can react adversely with certain substances. Here are things you should not mix or use with hypochlorous acid:

 

1. Strong Acids (e.g., Hydrochloric Acid, Sulfuric Acid)

Mixing HOCl with strong acids can release toxic chlorine gas, which is dangerous to inhale.

 

2. Strong Alkalis (e.g., Sodium Hydroxide, Ammonia)

Can neutralize HOCl, reducing its effectiveness.

Mixing with ammonia can produce chloramine vapors, which are harmful.

 

3. Hydrogen Peroxide (H₂O₂)

Reacts with HOCl to form oxygen gas and chloride salts, reducing disinfectant properties.

 

4. Vinegar (Acetic Acid) or Other Organic Acids

Can reduce HOCl's stability and may release small amounts of chlorine gas.

 

5. Alcohol (Isopropyl or Ethanol)

May reduce effectiveness when mixed, as they can denature HOCl.

 

6. Reducing Agents (e.g., Sodium Thiosulfate, Sulfites)

These can break down HOCl, rendering it ineffective.

 

7. Metal Surfaces (Especially Uncoated Iron, Copper, Carbon Steel)

HOCl is corrosive to some metals over time. Use on stainless steel or plastic instead.

 

8. Certain Organic Matter (Excessive Dirt, Blood, or Proteins)

While HOCl is effective as a disinfectant, large amounts of organic debris can deactivate it. Clean surfaces first for best results.

 

Safe Uses of Hypochlorous Acid

HOCl is generally safe for:

Skin disinfection (wound care, acne treatment)

Food sanitization (fruits, vegetables)

Surface disinfection (countertops, medical equipment)

Pet and veterinary care

Always store HOCl in a cool, dark place and avoid mixing it with unknown chemicals. If unsure, check compatibility before use.