ChloroKlean BPR Compliant Chlorine Dioxide Disinfectant - UK Supplier

Chlorine Dioxide vs Peracetic Acid for Food and Beverage CIP

Chlorine dioxide (ClO₂) and peracetic acid (PAA, also written CH₃CO-OOH) are both strong oxidising biocides widely used in food and beverage CIP, dairy processing, and beverage bottling. PAA is recognised for fast kill kinetics, breakdown into food-safe by-products (acetic acid and water), and broad EU and FDA acceptance as a no-rinse sanitiser. Its weaknesses are well documented: it is corrosive to mild steel and copper at use concentrations, has a sharp vinegar odour that requires extraction, costs substantially more per litre of treated water than ClO₂, leaves no measurable residual downstream, and forms stable hydrogen peroxide and acetic acid wastes that require neutralisation. Chlorine dioxide is BPR PT4-compliant for food and feed area hygiene, works at 0.1-0.5 ppm with sustained residual, penetrates biofilm in CIP loops, and is compatible with stainless steel and most modern food-contact materials. For most dairy, brewery, soft-drinks, and vegetable processing CIP applications, ClO₂ delivers equivalent microbiological outcomes at lower total cost and less corrosion risk.

Author
Key Advantage of ClO₂
Sustained residual through CIP loops, less corrosive to plant materials, and significantly lower cost per litre of treated water.
By-products
ClO₂ produces chlorite and chlorate at low concentrations, both regulated. PAA breaks down to acetic acid, water, and oxygen - food-safe but requires neutralisation of wash water.
pH Range
ClO₂ effective at pH 4-10. PAA effective pH 4-7; loses efficacy and stability above pH 7.
Regulatory Sources
EU BPR 528/2012 PT4, FDA 21 CFR 178.1010, EHEDG Guidelines, BRCGS Food Safety Standard, Codex Alimentarius
UK Compliance
Both are widely used under UK GB BPR PT4 for food and feed area hygiene. ChloroKlean Plus L20 is fully BPR-compliant for PT4 applications.
Comparison Guide

Chlorine Dioxide vs Peracetic Acid

Peracetic acid (PAA) is a powerful no-rinse sanitiser, but it is expensive, corrosive to mild steel and copper, leaves no residual, and carries a strong vinegar odour at use concentrations. ClO₂ delivers comparable efficacy with better residual, lower cost, and less corrosion.

ClO₂

Chlorine Dioxide

  • Sustained measurable residual through CIP loop
  • Compatible with stainless steel, PVC, EPDM
  • Substantially lower cost per litre treated
  • No vinegar odour - no extraction required
  • Penetrates biofilm in CIP return lines and gaskets
PAA

Peracetic Acid (PAA)

  • Fast kill kinetics on planktonic organisms
  • Food-safe breakdown to acetic acid and water
  • Corrosive to mild steel, copper, soft solder
  • Strong vinegar odour requires ventilation
  • Higher cost per litre than ClO₂

Detailed Comparison

Detailed comparison of chlorine dioxide versus peracetic acid
FeatureChlorine DioxidePeracetic Acid
Residual Disinfection

Yes (0.1-0.5 ppm)

Measurable through full CIP loop

Very short

Decomposes within minutes in dilute use

Biofilm Penetration

Excellent

Diffuses into and oxidises EPS matrix

Moderate

Effective surface kill but limited diffusion

Cost per litre treated

Low

Sub-ppm dosing in CIP rinse

High

Typical use at 150-400 ppm

Stainless Steel Compatibility

Good

Compatible with 304/316 at use doses

Good

Compatible at correct dilution

Mild Steel / Copper Compatibility

Moderate

Limited corrosion at residual doses

Corrosive

Attacks mild steel and copper at use dose

Odour at use concentration

Mild

Faint chlorine note only

Strong vinegar

Requires extraction; operator discomfort

Effluent Treatment

Simple

Low chlorite at use dose; standard treatment

Neutralisation needed

Acetic acid and H₂O₂ in wash water

Effect of Organic Soil

Modest

Selective oxidiser survives demand

Significant

Consumed by organic load - higher doses needed

BPR PT4 Status

Compliant

Authorised for food/feed area hygiene

Compliant

Also approved active substance under PT4

When to Choose Each

Choose Chlorine Dioxide When:

  • Cost per litre of treated CIP water matters at scale
  • Mild steel, copper, or soft solder is present in the plant
  • Operator exposure to vinegar odour is a workplace issue
  • Biofilm in CIP return lines or dead legs needs removal
  • A measurable residual is required at the end of CIP cycles
  • Effluent treatment cost or H₂O₂ residual is a concern

Consider Peracetic Acid When:

  • Hot CIP at 60-80°C where PAA stability is favourable
  • Plant already runs on PAA with established documentation
  • Final no-rinse sanitisation of stainless lines before product fill
  • Specific BRCGS or customer specification names PAA
  • Brewery yeast handling where pH and flavour profile matter
"Peracetic acid does the job, but it does it at a price - both literally in chemical cost and in plant wear. We've moved several dairies and beverage plants from PAA-only CIP to ChloroKlean Plus L20 in the recirculation loop, with PAA retained only for final no-rinse sanitisation where customer specifications demand it. The chemical bill typically halves, the corrosion complaints stop, and the microbiology results are equivalent or better. That is rarely a difficult conversation."
GO

Gavin Owen, Managing Director, ChloroKlean

BPR-compliant disinfection specialist

Why Choose ChloroKlean Plus L20

If you're considering switching to chlorine dioxide, ChloroKlean Plus L20 is purpose-built for industrial and commercial applications.

BPR PT4 Compliant

ChloroKlean Plus L20 is authorised under UK GB BPR for food and feed area hygiene. Approved for use on food-contact surfaces at the residual concentrations specified in the product authorisation.

Cost-Effective CIP Dosing

Sub-ppm dosing in recirculation versus 150-400 ppm PAA use rates means substantially lower chemical cost per CIP cycle. Independent verification available for cost-per-litre calculations.

Field-Proven in Food Processing

Documented results in vegetable processing (zero coliforms where hypochlorite failed) and poultry processing (99% chemical reduction). Same chemistry now used in dairy CIP and beverage bottling.

Regulatory and Scientific References

This comparison is informed by the following authoritative sources. Always refer to the latest published guidance.

FDA 21 CFR 178.1010
US Food and Drug Administration

Sanitizing Solutions - Chlorine Dioxide and Peracetic Acid

FDA permits both chlorine dioxide (up to 200 ppm) and peracetic acid as no-rinse sanitisers on food-contact surfaces, subject to specified concentrations and contact times.

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EU BPR PT4
European Chemicals Agency (ECHA)

Biocidal Products Regulation - Product Type 4 (Food and Feed)

PT4 covers biocides in food and feed areas including dairy, beverage, and CIP systems. Both chlorine dioxide and peracetic acid are approved active substances.

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EHEDG Doc 2
European Hygienic Engineering and Design Group

A method for the assessment of in-place cleanability of food processing equipment

EHEDG Doc 2 sets the European standard for verifying CIP system cleanability, applicable to both ClO₂ and PAA-based programmes.

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BRCGS Food Safety
Brand Reputation through Compliance Global Standards

Global Standard Food Safety Issue 9

BRCGS requires documented validation of cleaning chemicals, including microbiological verification. Both ClO₂ and PAA can support compliance when correctly specified and validated.

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Codex Alimentarius
Codex Alimentarius Commission

Code of Hygienic Practice (CAC/RCP 1-1969)

Codex sets the international hygienic baseline for food processing. Chlorine dioxide and peracetic acid are both recognised within Codex-aligned national regulations.

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Frequently Asked Questions

Cut CIP Chemical Cost Without Losing Compliance

ChloroKlean Plus L20 delivers BPR PT4-compliant chlorine dioxide for food and beverage CIP - typically 40-70% lower chemical cost than peracetic acid.