4-log
≥ 99.99% spore reduction demonstrated on building materials
Dutrion® ClO₂ Technology
The Chemistry Behind Remediation
One molecule does the killing and the deodorizing.
Chlorine dioxide ClO2 is a selective oxidant that inactivates mold, bacteria, viruses, mycotoxins and allergens — and destroys the odor compounds they leave behind. Below is what the science actually shows — and how the two Dutrion formats put that chemistry to work in the field.
5
mold species inactivated — incl. Stachybotrys "black mold"
90–100%
reduction of allergens & mycotoxins under tested conditions
01
Why oxidation beats wiping
Conventional cleaners move contamination around. Chlorine dioxide destroys it by electron transfer — pulling the structure apart at the cellular level rather than relying on contact friction. Three properties make it the workhorse oxidant for restoration.
Selective oxidant
It hunts organics, not your building
ClO₂ reacts preferentially with the organic matter in spores, biofilm and odor molecules. It carries a low oxidation power but a high oxidation capacity — aggressive toward contamination, comparatively gentle on most surfaces and equipment.
Works where bleach fails
Effective at low temp & high pH
Unlike chlorine, chlorine dioxide stays effective at low temperatures and across a wide pH range, and it does not shift the pH of what it touches. No chlorine smell, no salty residue — the chloride ion never enters the reaction.
Gas & vapor reach
It goes where a sprayer can't
As a true gas, ClO₂ penetrates porous materials, wall cavities, attics, ductwork and contents in place — the same property that let it remediate entire buildings after the 2001 anthrax response and heavily mold-contaminated structures since.
02
What the EPA actually measured
In a 2013 laboratory study, EPA's National Homeland Security Research Center fumigated common building materials — painted and wallpapered drywall, pine, ceiling tile, carpet and glass — contaminated with five mold species, plus pure allergen and mycotoxin. The reduction was scored as a log change: each "log" is a tenfold drop, so 4-log means 99.99% of viable spores gone.
Reading a 4-log reduction
10⁶
10⁵
10⁴
10³
10²
Start: ~1,000,000 viable sporesAfter: ≤ 100
- ≥ 4-log on every materialStachybotrys chartarum (toxic "black mold") was knocked down ≥ 99.99% on drywall, pine, carpet and glass across the full range of tested exposures.
- 99.2–100% allergen dropPure Alternaria allergen (Alt a1) fell between 99.2% and 100% on pine, carpet and glass at the higher exposures — allergens, not just live spores, were neutralized.
- 91.5–96.3% mycotoxin dropAflatoxin was reduced 91.5–96.3% on drywall, pine and glass. The persistent toxins mold leaves behind — a frequent gap in conventional remediation — were measurably lowered.
- Fumigate & reuse in placeEPA concluded most building materials and contents can be treated where they sit and effectively reused afterward, rather than demolished and hauled out.
Source: U.S. EPA, "Laboratory Evaluation of the Efficacy of Chlorine Dioxide Fumigation for Remediation of Building Materials Contaminated with Molds, Mycotoxins or Allergens," EPA/600/R-13-229, Nov 2013. The study evaluates high-CT gas-phase fumigation. EPA does not endorse any commercial product; figures describe the chemistry, not a Dutrion claim.
03
The harder targets: mycotoxins & allergens
Killing live mold is the easy part. The lasting health complaints — and the failed clearances — usually trace to what mold leaves behind: heat-stable mycotoxins and protein allergens that survive long after the colony is dead. A wider body of peer-reviewed work, beyond the EPA report, shows where chlorine dioxide helps and where it has limits.
Mycotoxins
Oxidizing the toxin, not just the mold
Mycotoxins are stable molecules that ordinary cleaning and even spore removal can leave intact. Chlorine dioxide degrades many of them directly by oxidation — though efficacy depends on the toxin, the dose and whether the toxin is shielded inside spore structures.
84.4%
Aflatoxin B1 on almonds. Gaseous ClO₂ degraded AFB1 by 84.4% while cutting A. flavus by 2.4 log; suppression held after a month of cold storage.
~100%
Aflatoxin in peanuts & corn. Fumigation drove AFB1 to near-undetectable levels in whole kernels — though grinding or post-heating could blunt the effect.
Caveat
Some toxins resist. In a sick-building study, ClO₂ gas inactivated mold and trichothecenes in water, but Stachybotrys remained toxic where satratoxin sat protected on the conidia — toxin location matters.
Allergens
Denaturing the protein that triggers reactions
Allergens aren't alive, so they can't be "killed" — they're proteins and organic fragments from pollen, dander, dust-mite and cockroach debris, and broken mold spores. As a selective oxidant, ClO₂ chemically alters their structure so the immune system no longer recognizes them, and as a gas it reaches allergen reservoirs in HVAC, cavities and porous materials that wiping can't.
≥97%
Mold allergen (Alt a1). EPA measured 97–100% reduction of Alternaria allergen on pine, carpet and glass — confirming the protein itself, not just the spore, was neutralized.
Protein
Denaturation, not masking. Because allergens are organic proteins, an oxidizer can deactivate them at the source rather than coating or perfuming over them — the mechanism behind allergen-reduction use in rooms and vehicles.
Reach
Gas goes airborne with the allergen. Dander, mite and pollen antigens become airborne through movement and airflow; low-level ClO₂ gas follows them into ducts and crevices a sprayer never touches.
Read it straight: chlorine dioxide is one of the few field-deployable chemistries shown to lower both mycotoxin and allergen load — but results vary by toxin, dose and how shielded the target is. It reduces and denatures; it is not a guaranteed 100% on every compound, and it does not replace source removal and moisture control.
04
Where chlorine dioxide earns its keep
The same oxidation that ends mold also ends the bacteria, biofilm and volatile compounds driving most restoration odors. One chemistry covers an unusually wide slice of the job board.
/01
Water Damage
Treats Category 2–3 microbial growth on structure and contents after extraction; halts mold colonization in the drying window.
/02
Fire & Smoke
Oxidizes embedded smoke and char odor compounds that masking agents only cover — at the molecular source, not the surface.
/03
Mold Remediation
Inactivates spores, hyphae and the allergens/mycotoxins they shed across porous and non-porous materials alike.
/04
Odor Removal
Destroys odor-causing bacteria and VOCs rather than perfuming over them — leaving no residual fragrance to flag.
/05
Biohazard & Trauma
Broad-spectrum sanitizer/virucide for decontaminating affected surfaces during cleanup of sensitive scenes.
/06
Disaster Cleanup
Lightweight, shelf-stable, mixed on site — sizes from a quart to large batches with no generator or power supply.
/07
Hoarding Cleanup
Knocks down compounded biological load and deeply set odor in heavily soiled, long-neglected interiors.
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Pet & Wildlife
Targets the bacteria behind urine, decomposition and animal-intrusion odor in cavities a sprayer can't reach.
05
How it stacks up against the alternatives
Most restoration disinfectants fall into one of three chemistries: an oxidizer like chlorine dioxide, a quaternary ammonium (quat) cationic surfactant, or a botanical thymol formula. All three are EPA-registered and all three have a place — but they behave very differently on the contaminated, organic-loaded, porous problems that define this trade. Here's the honest breakdown.
| Chlorine DioxideDutrion | Quaternary AmmoniumQuats / QAC | BotanicalThymol-based | |
|---|---|---|---|
| Mechanism | Selective oxidationElectron transfer hits multiple cell targets at once | SurfactantCationic charge disrupts the cell membrane | PhenolicThymol breaks down cell walls on contact |
| Sporicidal | YesKills mold & bacterial spores at proper CT | NoSporostatic at best — spore wall blocks it | NoNo sporicidal claim |
| Non-enveloped viruses | YesOxidizer; virucidal incl. Rotavirus-class | LimitedUnreliable on non-enveloped viruses | VariesBy specific product label |
| Performance in organic soil | Retains capacityHigh oxidation capacity works through load | InactivatedOrganic soil neutralizes quats | ReducedPre-cleaning still required |
| Hard-water tolerance | UnaffectedWorks across pH and at low temp | InactivatedHard water cuts efficacy sharply | TolerantGenerally unaffected |
| Residue & rinse | NoneNo film, no rinse | ClingsLeaves residue; can need rinsing | LowNo-rinse, biodegradable |
| Vapor / gas-phase reach | YesPenetrates cavities, HVAC, porous materials | NoLiquid only | Fog onlyDroplets don't penetrate like a true gas |
| Degrades mycotoxins | YesOxidizes the toxin molecule | NoNo toxin action | NoNo toxin action |
| Denatures allergens | YesOxidative protein denaturation | NoNo allergen claim | SomeCertain labels claim allergen reduction |
| Typical dwell time | 1 minVirucide at 400 ppm | ~10 minFor proper disinfection | 1–4 minBy organism |
| Resistance concern | LowMulti-target oxidation resists adaptation | DocumentedQAC-resistance genes reported | LowBotanical phenolic |
| Where it works | Surfaces + whole-spaceLiquid and vapor fumigation | Hard, non-porousSurface only | Hard, non-porousSurface only |
The fair read
Botanicals earn their spot on low toxicity, no PPE and simplicity for routine surface disinfection — but they're surface-only and not sporicidal.
Quats are inexpensive and stable for general housekeeping — until organic soil, hard water or spores enter the picture, which is most of restoration.
Chlorine dioxide is the one chemistry that stays effective through organic load, kills spores, degrades toxins, and reaches what a sprayer can't as a vapor.
Comparison reflects documented class characteristics of each chemistry; specific EPA-registered label claims, concentrations and dwell times govern actual use of any product. Sources: CFSPH "Disinfection 101" (Iowa State); ScienceDirect / Taylor & Francis QAC overviews; CISA QAC alternatives fact sheet; manufacturer labels for thymol-based botanical disinfectants. EPA does not endorse any commercial product.
06
Two formats, two jobs
Same active chemistry, two delivery modes. The decision comes down to one question: are you treating surfaces you can reach with a sprayer, or are you treating a whole space — including everything porous and out of reach inside it?
Liquid · wet application
Dutrion Tablets
Drop a tablet in water, get a stable ClO₂ solution. Spray, wipe or pump onto hard, non-porous surfaces.
Use case
Surface sanitizing & disinfecting — walls, floors, equipment, tile, sealed wood, contents
100 ppm
Disinfectant, biocide, fungistat, mildewstat, algaestat, slimicide — 5-min dwell
400 ppm
Virucide (incl. SARS-CoV-2 per Rotavirus directions) — 1-min dwell. 4×1 g or 1×4 g tablet per quart
Sizing
1 g (quart) · 4 g (gallon) · 20 g · 100 g (large batch)
Format
EPA-registered · List N · no rinse · no film · solution stable up to 30 days
Targets
Staph aureusPseudomonasKlebsiellaSalmonellaMold & mildewOdor bacteria
Reach for tablets when
You're disinfecting accessible surfaces and contents, building cleaning solution by the quart, gallon or pail, and need a residue-free finish you can stand behind on a clearance.
Shop Dutrion Tablets →
Vapor · dry fumigation
Dutrion Powder Kits
A two-part (Part A + B) concentrate that fills an entire space with ClO₂ vapor — reaching everything a liquid can't.
Use case
Whole-room odor & microbial treatment via vapor — penetrates porous materials, cavities, contents
Strength
Dutrion Powder 20 produces 50,000 ppm ClO₂ — the most concentrated 2-part system for commercial use
Coverage
750–1,250 sq ft (6,000–10,000 cu ft) vapor-treated per 525 g kit, by odor severity
Modes
Dry vapor fumigation or dissolved into water for liquid odor treatments
Format
EPA-registered · transportable, non-explosive · mixed on site, no generator
Targets
Set-in odorMold & mildewFungiOdor bacteriaHard-to-reach voids
Reach for powder when
The contamination or odor is everywhere and out of reach — smoke through a structure, animal odor in cavities, a hoarding interior — and you need the gas to find it for you.
Shop Dutrion Powder Kits →Quick
decision
decision
Can a sprayer touch every contaminated surface?Accessible hard surfaces, contents, clearance disinfection → Tablets, 100–400 ppm liquid.
Is it porous, structural, or out of reach?Smoke, deep odor, whole-space treatment, voids and cavities → Powder kits, dry vapor fumigation.
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Use it right, and document it
Label is law
Both Dutrion formats are EPA-registered pesticides. It is a violation of federal law to use either in a manner inconsistent with its labeling. Keep the product label on hand at the point of use, confirm the ppm and dwell time for the claim you're making, and follow the SDS — the EPA fumigation study describes the underlying chemistry, not a substitute for label directions.
Handle as an oxidizer. Mind fumes during mixing, ventilate the work area, wear appropriate PPE, and use a NIOSH/MSHA-approved respirator for chlorine dioxide when fogging or high-pressure spraying. Extended metal contact can discolor or pit; never combine with acids or other cleaners.
- →Verify target ppm before mixing — 100 ppm disinfect, 400 ppm virucide
- →Hold the labeled dwell time; keep surfaces visibly wet for liquid claims
- →Pre-clean heavily soiled surfaces before disinfecting
- →Vacate and ventilate during vapor fumigation; re-enter only after clearance
- →Confirm levels with chlorine dioxide test strips when unsure
- →Log concentration, time and conditions for your remediation record