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.

    View source
    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.

    View source
    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.

    View source
    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.

    View source
    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.

    View source

    Frequently Asked Questions

    In most CIP applications, yes - significantly. PAA is typically dosed at 150-400 ppm, whereas ClO₂ is dosed at 0.1-0.5 ppm in recirculation. On a per-litre basis, ClO₂ chemical cost is usually 40-70% lower. Exact saving depends on PAA pricing and CIP cycle length. Contact ChloroKlean for a per-site cost calculation against current PAA spend.

    At typical use concentrations, yes. PAA at 150-400 ppm attacks mild steel, copper, and soft-soldered joints. ClO₂ at 0.1-0.5 ppm residual is compatible with stainless steel 304/316, PVC, PEX, PP, and most modern food-grade elastomers. For older plants with mixed metallurgy, this corrosion difference often drives the switch from PAA to ClO₂. Request material compatibility data.

    Yes, within the authorisation limits set in its BPR PT4 product authorisation and (in the US) FDA 21 CFR 178.1010, which permits ClO₂ up to 200 ppm on food-contact surfaces. Specific concentrations and contact times depend on the application.

    Not in the same line at the same time. PAA and ClO₂ are both strong oxidisers and will react with each other, consuming both biocides without microbiological benefit. Standard practice is sequential: ClO₂ for the recirculation phase, PAA for final no-rinse sanitisation if customer specs require it. ChloroKlean's technical team can specify a hybrid CIP programme.

    Yes, peracetic acid retains activity at 60-80°C, one of its strengths in dairy hot CIP. However, decomposition rate also increases with temperature. Chlorine dioxide is also stable at hot CIP temperatures and its residual lasts longer through long recirculation loops. See our poultry processing case study for hot CIP results.

    Both are explicitly permitted under FDA 21 CFR 178.1010 as no-rinse food-contact sanitisers, with specified concentration and contact-time limits. For UK food and feed area hygiene, equivalent compliance is via BPR PT4 product authorisations.

    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.