Hypochlorous acid has earned genuine respect in food hygiene. It kills bacteria, viruses, and yeast rapidly, it’s relatively safe to handle compared to traditional chlorine chemistry, and it can be generated on site from salt and water or supplied in a packaged stabilised format. For produce washing and final sanitising steps, it is genuinely effective.

The problem surfaces when HOCl is positioned as a broader solution to food factory cleaning costs. Because surfaces need to be clean before sanitising, and HOCl is not great at cleaning substrates or removing stubborn soils, fats, proteins, or grease. That means all the upstream cleaning steps stay exactly where they are. In open plant cleaning, for example, the typical process runs: a hot water pre-rinse, an alkaline foam detergent stage, a hot water rinse, a sanitiser application, and a final rinse. HOCl improves one step at the end of your process. It doesn’t change the process.

This article explains what eloclear does differently, and why manufacturers who have evaluated both are increasingly choosing it as their HOCl alternative.

What Is Hypochlorous Acid (HOCl) and How Is It Used in Food Factories?

Hypochlorous acid is a chlorine-based disinfectant produced by electrolysing salt water, typically using membrane electrolysis systems. It is a small, electrically neutral molecule, and that structure is precisely what makes it such an effective pathogen killer. Unlike charged ions such as hypochlorite (OCl-), HOCl crosses bacterial cell walls and membranes via passive diffusion with relative ease. Once inside the cell, it acts as a potent oxidant, disrupting calcium ion channels, destabilising mitochondrial function, and oxidising critical biomolecules including proteins and lipids. The result is rapid cell death across a wide range of bacteria, viruses, and yeasts.

Within food processing, HOCl has primarily been used for final sanitising steps after cleaning, produce washing (fruit and vegetables), and some water treatment applications. It is well suited to these roles. The issue is not what HOCl does in those applications: it’s what it cannot do in the steps before them.

HOCl has no detergent properties. Its chemistry is not suited to lifting or emulsifying the fats, proteins, and organic soils that accumulate on surfaces during food production in environments such as meat processing, dairy, bakery, or ready meals. So when a food manufacturer adds HOCl to their process, they are typically replacing only the final sanitiser. The entire upstream cleaning process remains unchanged, and unchanged means still costing the same in water, energy, chemicals, and time.

The Structural Problem With HOCl as a Cleaning Strategy

The appeal of HOCl is understandable. It looks like a next-generation chlorine-based solution that might simplify the cleaning process. In practice, the simplification is limited to a single step.

A standard open plant cleaning process in a food factory typically involves:

• Dry gross debris removal
• A hot water pre-rinse to remove loose soils
• An alkaline foam detergent stage to lift fats and proteins
• A hot water rinse to remove detergent residue
• A sanitiser application
• A final rinse

HOCl enters at the sanitiser step. Everything before it is untouched. All the cost and time associated with those steps (the water heating, the chemical purchasing, the rinse cycles, the labour) stays in place. For manufacturers hoping HOCl would deliver meaningful reductions in cleaning cost or downtime, that is a significant limitation.

The Corrosion Question HOCl Suppliers Don’t Always Answer Clearly

Early HOCl systems operating at acidic pH caused well-documented problems with stainless steel equipment, creating long-term resistance to the technology among engineering teams. This concern has not gone away, and it is worth scrutinising claims made by some HOCl suppliers that their product does not require rinsing from food contact surfaces. Residual chlorine species are highly corrosive and known to cause pitting corrosion on the austenitic stainless steels most commonly used in food manufacturing, including grades 304 and 316. Leaving HOCl residues on equipment surfaces without thorough rinsing is an engineering risk that any food manufacturer evaluating the technology should take seriously.

Membrane electrolysis systems also carry higher cost of ownership and sensitivity to water quality variation. Membranes can tear during routine maintenance and are sensitive to fluctuations in water hardness, which creates ongoing maintenance risk in real factory environments.

What Is eloclear and How Does It Differ From HOCl?

eloclear is produced through membrane-free electrolysis of salt and water, generating a mildly alkaline solution at around pH 9. That distinction matters more than it might seem.

At a mildly alkaline pH, eloclear is less corrosive to stainless steel and can actively remove fats, proteins, and food soils from surfaces while simultaneously disinfecting. It is both a cleaner and a sanitiser in a single application. That dual action is what allows food manufacturers to remove entire steps from the cleaning process rather than simply improving one of them.

The differences are consistent across every dimension that matters to food manufacturers:

• HOCl is a sanitiser only, while eloclear functions as both a cleaner and a sanitiser.
• HOCl cannot remove fats, proteins, or grease from surfaces; eloclear actively does.
• HOCl replaces no steps in the cleaning process; eloclear can replace multiple.
• HOCl is acidic by nature; eloclear operates at a mildly alkaline pH of around 9.
• On corrosion, HOCl has a historically problematic record with stainless steel; eloclear carries a lower risk but still needs to be rinsed correctly.
• The ESG impact of HOCl is incremental; eloclear’s is structural.
• HOCl is produced via membrane electrolysis, where membranes are sensitive to water quality and can tear during maintenance; eloclear is generated through membrane-free electrolysis, making it more tolerant of industrial water conditions with a lower total cost of ownership.

The simplest way to put it: HOCl is a product improvement. eloclear is a process improvement.

The chemistry is not complicated. eloclear contains both hypochlorous acid and hypochlorite, the same active ingredients already trusted across food hygiene, at a pH that supports cleaning in a way that HOCl cannot. The membrane-free generation system is tolerant of industrial water quality, carries lower cost of ownership, and requires no membrane replacement.

What Switching From HOCl to eloclear Looks Like in Practice

Because eloclear cleans and disinfects simultaneously, it enables measurable operational changes that HOCl cannot:

Shorter cleaning cycles. Removing steps from the cleaning process directly reduces the time equipment is offline. More production uptime per shift or faster turnaround between cleans.

Lower water consumption. Fewer rinse stages means fewer litres consumed per clean. eloclear supports cold water rinsing in many applications, removing the energy cost of heating rinse water entirely.

Fewer chemicals on site. Replacing multiple bought-in chemical products with a single generated solution reduces inventory, COSHH complexity, storage requirements, and operator handling risk.

Cleaner effluent. Fewer chemicals through the process means fewer chemicals leaving in wastewater streams, with downstream benefits for effluent treatment and environmental reporting.

Lower corrosion risk. eloclear’s mildly alkaline pH is less aggressive toward stainless steel than acidic HOCl, which matters for equipment longevity and engineering confidence.

By contrast, switching to HOCl mainly improves the sanitising step while leaving the rest of the process intact.

Is eloclear Suitable for Sites Currently Using HOCl?

eloclear is primarily deployed in food and beverage manufacturing sites using open plant cleaning, across sectors including meat processing, bakery, and ready meals production. Both eloclear and HOCl, when used correctly, meet food hygiene standards. eloclear carries a higher active chlorine concentration, so disinfection efficacy is strong. The transition from HOCl to eloclear is a process change, not a safety compromise.

The Sustainability Difference

HOCl, used purely as a sanitiser at the end of an otherwise unchanged process, delivers limited ESG impact. It improves the safety and toxicity profile of the sanitising step, but the majority of the process footprint (the hot water, the bought-in chemicals, the effluent stream) stays in place.

When HOCl is purchased in packaged form rather than generated on site, the ESG position is worse still. Like eloclear, HOCl is mostly water. Unlike concentrated traditional chemicals, which are formulated to minimise the volume shipped, packaged HOCl solution means transporting large quantities of water in IBCs and jerry cans, with all the associated transport emissions and packaging waste that brings. The case for on-site generation applies to HOCl just as much as it does to eloclear, and it is one of the genuine environmental advantages of electrolytic systems over bought-in chemistry.

eloclear delivers sustainability benefits that are structural rather than marginal. Reduced Scope 3 emissions from eliminated chemical supply chains. Lower water abstraction and discharge. Lower energy consumption from reduced hot water demand. Cleaner effluent streams. No drums, IBCs, or transport miles. For manufacturers with committed ESG targets, the difference between incremental improvement and structural change is material.

Common Questions from Manufacturers Evaluating the Switch

“We already invested in an HOCl system. Is switching worth it?”
That depends on what you paid and what your cleaning process costs you annually. The ongoing cost of running a 5 or 6-step cleaning process in water, energy, chemicals, and downtime is significant. The payback calculation should include all of those, not just product cost.

“What about the corrosion history of chlorine-based systems?”
The corrosion concerns are real. eloclear’s mildly alkaline pH is significantly less aggressive toward stainless steel, provided rinsing protocols are followed.

“Can eloclear be generated on site?”
Yes. eloclear is generated on site using OZO Innovations’ electrolysis systems, using salt and water as inputs. There is no chemical supply chain to manage

If you want to see how eloclear compares against your current HOCl-based process, speak to the OZO Innovations team for a process assessment.