Hypochlorous acid at use strength is one of the easier sanitation chemicals to work with, which is a large part of its appeal. Easier is not the same as careless, though. It is still a chlorine solution: it must not be mixed with acids or ammonia, it loses strength if stored badly, and the inputs some generators use need more care than the solution they produce. This page sets out what the safety data sheets say and how to build that into daily practice.
About claims on this page
EcoloxTech generators produce a hypochlorous acid solution on site. They are not EPA-registered disinfectants and we make no efficacy claims for them or for the solution they produce. The only EcoloxTech product with disinfection claims is HOCl-AS200 (EPA Reg. No. 101112-1), used according to its label. Research cited here describes published studies of hypochlorous acid and electrolysed water; it is not a claim for any product.
What a safety data sheet is
A safety data sheet (SDS) is the manufacturer’s standard summary of a chemical’s hazards and how to handle it. Under OSHA’s Hazard Communication Standard (29 CFR 1910.1200), employers must keep an SDS for each hazardous chemical in the workplace, make it readily available to staff and train them on it. SDSs follow a 16-section format; the sections people use most are 2 (hazards), 4 (first aid), 7 (handling and storage), 8 (exposure controls and PPE) and 10 (stability and reactivity).
HOCl-AS200: what the SDS says
| SDS section | HOCl-AS200 (Revision 07, August 2025) |
|---|---|
| Composition | Hypochlorous acid ≤0.02%, sodium chloride <0.33%, water to 100% |
| Hazards | None of the ingredients are classified as hazardous in the amounts present; under normal conditions of use the likelihood of adverse health effects is minimal |
| First aid | None required. If discomfort develops: move away from exposure; flush skin or eyes with plenty of water; if swallowed, drink two glasses of water. Obtain medical attention if effects occur |
| Spills | Mop up or absorb with inert material; finish cleaning with water |
| Storage | Cool area away from UV and direct sunlight; keep the container tightly closed |
| Personal protection | General industrial hygiene; respirator not required with adequate ventilation; eye and skin protection not required for normal use |
| Stability and reactivity | Loses hypochlorous acid at high temperature and in direct UV light. Avoid acids, heavy metals, reducing agents, ammonia, ether and hydrogen peroxide; reaction with acids can release chlorine gas |
| Transport | Not regulated as dangerous goods (DOT, IATA, IMDG) |
Our recommendation: although the SDS does not require PPE for normal use, we recommend splash goggles as good practice whenever spraying or decanting, and gloves if staff prefer them.
What the HOCl-AS200 label adds
The label is the legal document for a registered product, and several of its directions are safety and handling points:
- The signal word is CAUTION; follow the precautionary statements on the label.
- Do not use with other household or industrial chemicals such as toilet bowl cleaners, rust removers, acids or products containing ammonia — doing so can release hazardous, irritating gas.
- Prolonged contact with metal may cause pitting or discoloration.
- Use white HDPE for any secondary container.
- If the product is not used immediately after production, test it; do not use below 149 ppm available chlorine.
- It is not a terminal sterilant or high-level disinfectant for critical or semi-critical medical devices.
Generated solution
Solution produced by an EcoloxTech generator has its own SDS (“Electrolytically Generated Hypochlorous Acid”). Its hazard, first-aid, handling and PPE sections are in line with the HOCl-AS200 SDS: no ingredients classified as hazardous in the amounts present, no PPE required for normal use, store cool and away from sunlight, and keep away from acids, ammonia and other incompatible chemicals. Keep a copy wherever the solution is used.
The inputs need more care than the output
This is the point most often missed. The finished solution is mild; some of what goes into the generator is not.
| Input | Hazard | Handling |
|---|---|---|
| Food-grade salt | Low | Keep dry and clean; use salt without iodine or anti-caking agents |
| Ready-mixed brine containing acid (e.g. BrinePlus RTU) | Contains hydrochloric acid; can cause skin and serious eye damage | Per its SDS: chemical-resistant gloves, goggles or face shield, and a chemical apron |
| Hydrochloric acid (where a system uses it) | Corrosive | Per its SDS: full eye and face protection, chemical-resistant gloves and clothing, ventilation; store away from hypochlorous acid and other chlorine products |
Keep acid-containing inputs in their own area, away from the finished solution. Mixing acid with any chlorine solution releases chlorine gas — the same reason you never mix bleach with acidic cleaners.
PPE at a glance
| Task | Recommended protection |
|---|---|
| Spraying, wiping or mopping with HOCl at use strength | Splash goggles recommended; gloves optional |
| Decanting HOCl into bottles or sprayers | Splash goggles |
| Fogging or misting | Follow the product label and your risk assessment for ventilation and re-entry |
| Handling acid-containing brine or hydrochloric acid | Chemical-resistant gloves, goggles or face shield, chemical apron, per the input’s SDS |
| Generator maintenance | Isolate power first; eye protection and gloves as the manufacturer’s manual directs |
For comparison with other chemistries, see the safety and PPE column on HOCl vs other sanitation chemicals.
Storage and stability
- Closed, opaque containers; cool; out of direct sunlight.
- White HDPE for secondary containers of HOCl-AS200.
- Label every secondary container with its contents.
- Record the opening date for bottled product, and test stored solution before use.
- Keep away from acids, ammonia, reducing agents, hydrogen peroxide and heavy metals.
The research hub includes work on the stability of low-concentration electrolyzed water, which shows why storage conditions matter.
What the research examines on safety
Hypochlorous acid is also produced naturally by white blood cells, and its behaviour in and on the body has been studied extensively, including in wound care. Examples in the hub include a review of HOCl for disinfection, antisepsis and wound care, HOCl as a component of innate immunity and an animal study, inhalation of a fog of hypochlorous acid: biochemical, antimicrobial and pathological assessment. These describe published research under specific conditions; they do not replace the label, the SDS or your own risk assessment.
Training staff
- What the solution is, and why it must never be mixed with other chemicals.
- Where the SDSs are kept, and what the key sections say.
- How to test strength and pH, and what to do when a reading is out of range.
- Correct application: clean first, keep surfaces wet for the contact time, follow the SOP or label.
- Storage and container labelling.
- Safe handling of brine or acid inputs, for anyone who refills the generator.
- First aid, as set out in the SDS.
Record the training. It is part of the compliance file.
If something goes wrong
| Situation | What to do |
|---|---|
| Splash in the eyes | Flush with plenty of water; obtain medical attention if irritation develops (per the SDS) |
| Spill of HOCl solution | Mop up or absorb with an inert material and finish with water |
| Spill of acid-containing brine or hydrochloric acid | Follow that input’s SDS; wear the PPE it specifies; keep it away from chlorine solutions |
| Accidental mixing with an acid or ammonia product, or a chlorine smell that is stronger than usual | Stop work, leave and ventilate the area, and seek medical attention if anyone has symptoms; do not return until the air is clear |
| Generator fault or leak | Isolate power and water, and contact the supplier; do not open the cell housing unless trained |
Ventilation and application method
Normal room ventilation is adequate for wiping, spraying and mopping with hypochlorous acid at use strength, according to its SDS. Application methods that put more solution into the air — fogging, misting and electrostatic spraying — call for more care: follow the product label for the method and area, and your own risk assessment for ventilation and re-entry. Ventilate the area around the generator itself too, because the cell releases small amounts of hydrogen as part of normal operation.
Free HOCl Compliance Pack
Checklists, a sanitation SOP template, strength and pH logs, and quick references for HOCl-AS200 and the rules that usually apply by sector. Ready to print and file.
Get the free PDFFrequently asked questions
Do I need PPE to use HOCl-AS200?
Its SDS does not require PPE for normal use. We recommend splash goggles as good practice when spraying or decanting.
Is hypochlorous acid safe on skin?
The HOCl-AS200 SDS lists it as non-irritating and non-sensitising. Follow the label for surface use; it is a surface disinfectant, not a skin product.
What must it never be mixed with?
Acids, ammonia, other cleaning chemicals, reducing agents and hydrogen peroxide. Mixing with acid can release chlorine gas.
Is it hazardous for shipping?
The HOCl-AS200 SDS lists it as not regulated as dangerous goods for DOT, IATA or IMDG transport.
How do I dispose of unused solution?
Follow the SDS and your local regulations; the SDS states it is not classified as hazardous waste in its present state.
Where can I get the SDSs?
They ship with the products, and we send them on request. Contact us.