Chlorine Dioxide Drops Calculator

A kit makes chlorine dioxide when the two parts meet: equal drops of Part A and Part B, three minutes to react, then water. How many drops depends on the job and how much water you are mixing into. Pick both and it tells you.

What are you cleaning?

Cleaning hard surfacesUtensils, food preparation areas, cutting boards, dispensersHeavy cleaningNeglected surfaces, clean rooms, areas that have stood unusedDeodorizing stored water linesRemoves organics and smell from lines and storage vesselsProduce washSpray or dip fruit and vegetables before storingCut flowers and horticultureNon-potable water; slows microbial transfer between stems

How much water?

You need

drops of Part A

drops of Part B

Mix them and wait three minutes — it turns amber — then add 32 oz of water.

Strength: ≈ 15 ppm
Leave it on: 5 minutes
Uses up: 0.5% of a kit

A kit holds about 2,400 drops of each part — enough to do this job 200 times.

Figures from KVLab (Keavys Corner LLC), who manufacture these kits: three drops of each part give roughly 25–35 ppm once 4 oz of water is added, and the concentrations come from their published application chart. The same arithmetic reproduces their three named mixes exactly. KVLab products are not registered by the EPA. They are offered as components to prepare chlorine dioxide for cleaning and general use, and no claim is made as to efficacy against any disease or pathogen.

The Three Standard Mixes

Most jobs are one of these. Mix the two parts and wait 3 minutes — it turns amber — then add the water.

Mix	Part A and Part B	Water	Strength	For
Strong	30 drops each	8 oz	≈ 150 ppm	A thorough clean of hard surfaces — stand 10 minutes, then wipe or rinse Mould and mildew, shower mats and curtains
Mild	6 drops each	16 oz	≈ 15 ppm	Day-to-day wiping — spray, wipe, no rinsing needed Cutting boards, utensils, worktops and sinks Coffee makers, home breweries, ice maker water lines
Very mild	16 drops each	1 gallon	≈ 5 ppm	Rinsing vegetables — soak a minute, then rinse well

A made-up solution keeps about 20 days in a dark cupboard, so the leftovers of a mix are worth keeping rather than pouring away.

Citric Acid or Hydrochloric?

The two activators produce the same amount of chlorine dioxide — the maker states that citric acid at 50% and hydrochloric at 4.375% are equivalent for this purpose. Citric is the milder thing to keep in a cupboard; hydrochloric reacts faster. The drop count is the same either way.

Why Mix It Fresh Each Time

Chlorine dioxide is a gas held in solution and it does not keep. That is the reason a kit is two bottles rather than one ready-made jug: the parts are stable apart and the useful thing is made in the minute before you use it. It is also why a kit that looks small goes a long way — a bottle pair holds thousands of drops.

What These Kits Are Not For

KVLab products are not registered by the EPA. They are offered as components to prepare chlorine dioxide for cleaning and general use, and no claim is made as to efficacy against any disease or pathogen. If the job is treating or storing drinking water, that calls for a product registered for it — see the dosing page for Purogene, which is registered with the EPA and carries an approved label for exactly that.