How to Mix and Store Hypochlorous Acid (HOCl)

March 30, 2026|Marc Patterson

How Do You Mix and Store Hypochlorous Acid Correctly?

Mix hypochlorous acid using the correct water, bottle, and Activation Packet™ size so the solution starts at its intended concentration and pH.

After mixing, store it sealed, cool, and away from direct sunlight and heat to help maintain expected performance.

Table of Contents

How To Mix HOCl Correctly?
How To Store HOCl After Mixing?
What Reduces HOCl Effectiveness?

_{Key Takeaways | Related Articles}

How Do You Mix Hypochlorous Acid Correctly?

Hypochlorous acid is mixed by combining one River Refresh Activation Packet™ with distilled or purified water in the correct River Refresh bottle, then swirling or gently shaking to activate. The process takes less than 30 seconds, but using the correct water, bottle, and packet size is essential to achieve the intended concentration.

This guide applies to freshly activated hypochlorous acid mixed from an Activation Packet™. Pre-mixed HOCl products do not use the same mixing steps.

Before you mix:

Use the River Refresh bottle — opaque and BPA-free
Use the correct bottle size for the packet — 16 oz bottle with one 16 oz Activation Packet™
Make sure the bottle is clean and has not been used for other products
Use only one Activation Packet™ at a time

3 simple steps:

Insert — Place the Activation Packet™ into the bottle. Do not cut or open it.
Add Water — Fill with distilled or purified water. Do not use tap, spring, mineral, alkaline, electrolyte, or filtered water.
Activate — Secure the sprayer and swirl or gently shake to activate.

How Should You Store Hypochlorous Acid After Mixing?

After mixing, store hypochlorous acid sealed in a cool area away from direct sunlight and heat.

Storage tips:

Keep the bottle sealed when not in use
Store in a cool area away from direct sunlight
Do not leave outside, on sunny windowsills, in cars, garages, or near appliances

When mixed and stored properly, the solution is expected to maintain its intended formulation for up to 45 days.

What Reduces Hypochlorous Acid Effectiveness?

Hypochlorous acid loses effectiveness when the initial mix is compromised or when it is exposed to conditions that break down the solution. Avoid these factors to maintain expected performance.

At Mixing, avoid

Tap water — minerals and chlorine can alter the chemistry and reduce effectiveness
Previously used or contaminated bottles — residue from other products can interfere with the solution
Metal containers — can negatively affect the solution

After Mixing, avoid

Light — direct sunlight such as leaving the bottle outside or on a windowsill
Heat — hot environments like cars, garages, or near appliances
Air — leaving the bottle open or allowing unnecessary air exposure during use

Exposure to sunlight, heat, and air breaks down hypochlorous acid. Greater exposure leads to faster loss of HOCl, reducing effectiveness.

Air exposure cannot be eliminated because headspace increases as the solution is used. Keeping the bottle sealed between uses helps limit unnecessary exposure.

Proper mixing and controlled storage help maintain the intended concentration so the solution performs as expected.

For a deeper explanation of why freshness affects HOCl performance, see why fresh hypochlorous acid matters.

Key Takeaways

Mix using distilled or purified water — never tap, spring, mineral, alkaline, electrolyte, or filtered water
Do not cut or open the Activation Packet™ — insert it whole
Use the correct clean, opaque River Refresh bottle and matching packet size
Store sealed in a cool area away from direct sunlight and heat
Light, air, and heat reduce HOCl strength after mixing
When mixed and stored properly, the solution is expected to maintain its intended formulation for up to 45 days