Household cleaning
Zoflora Concentrated Multipurpose Disinfectant dupe
Why pay around £4.50 for Zoflora? The bulk active is Benzalkonium chloride (BAC 50) — 92% less per working litre than a typical shelf pack.
From the retail pack to the active and the mix
1 · Retail
Zoflora Concentrated Multipurpose Disinfectant
500 millilitres · £4.50 typical snapshot
Ethanol (about 65–75%) and perfume compound
2 · Active
Benzalkonium chloride
1.87% on the label
68424-85-1C22H40ClN
Bulk Benzalkonium chloride (BAC 50)
3 · Mix
1 ml BAC 50 + 999 ml water ≈ Zoflora 1:40 working strength
£0.00 per working litre · 92% less than the shelf pack
- Active
- Benzalkonium chloride
- CAS
- 68424-85-1
- Dupe
- Benzalkonium chloride (BAC 50)
- Saving
- 92% / L
Saving is per litre of working-strength mix versus a typical pack price, not versus the DIY kit total. Shop prices move — always check the listing.
Label teardown
What the pack promises versus what the label chemistry actually is.
The marketing claim
“Kills 99.9% of bacteria and viruses”
The chemical reality
Zoflora’s biocide is benzalkonium chloride at about 1.87% — the same quat family as Patio Magic, sold as a scented kitchen concentrate. A 1:40 dilute is about 470 ppm BAC. One millilitre of BAC 50 in a litre of water lands in that working band; the perfume and ethanol are the brand, not the kill.
Active vs filler
1.87% Benzalkonium chloride · 98% carrier / filler — Ethanol (about 65–75%) and perfume compound
- Typical retail
- £4.50
- 500 millilitres
- Estimated active cost
- £0.07
- Scaled from bulk £19.99 / 5 litres
- Indicative markup
- 60.2×
- Snapshot maths, not a live shop price
The Marketing Claim & The Catch
A 500 millilitres pack of Zoflora Concentrated Multipurpose Disinfectant typically retails around £4.50 in household cleaning. That is a UK shelf-price snapshot for the maths on this page — not a live shop quote or a manufacturer RRP. Listings, sizes and deals move. The marketing line is that you are buying a finished lifestyle product, not a weighed chemical.
On the pack: Kills 99.9% of bacteria and viruses; Eliminates odours and leaves a 24-hour fragrance; and 500 ml makes over 20 litres of full-strength disinfectant.
The catch: Zoflora’s biocide is benzalkonium chloride at about 1.87% — the same quat family as Patio Magic, sold as a scented kitchen concentrate. A 1:40 dilute is about 470 ppm BAC. One millilitre of BAC 50 in a litre of water lands in that working band; the perfume and ethanol are the brand, not the kill.
- “Kills 99.9% of bacteria and viruses”
- “Eliminates odours and leaves a 24-hour fragrance”
- “500 ml makes over 20 litres of full-strength disinfectant”
Proprietary Blend & Dosage Breakdown
The labelled active is Benzalkonium chloride at 1.87%. Everything else in the pack is ethanol (about 65–75%) and perfume compound.
At 1.87% active, most of what you pay for is carrier and packaging. The brand is selling convenience, fragrance and a label — not a uniquely potent molecule.
Branded working strength is whatever comes out of the bottle. The bulk alternative is 50% Benzalkonium chloride (BAC 50), mixed to 1 ml BAC 50 + 999 ml water ≈ Zoflora 1:40 working strength.
- Labelled active
- Benzalkonium chloride
- 1.87%
- Carrier
- Ethanol (about 65–75%) and perfume compound
- Retail pack
- 500 millilitres · £4.50
The Active Chemical Alternative (Dupe Stack)
The dupe stack is Benzalkonium chloride (BAC 50) at 50% bulk. Indexed as CAS 68424-85-1, formula C22H40ClN. Buy it as 5 litres for around £19.99 from Amazon UK.
Working strength: 1 ml BAC 50 + 999 ml water ≈ Zoflora 1:40 working strength. Indicative cost £0.00 per diluted litre — 92% below a typical branded pack on a per-litre basis, before you reuse leftover bulk.
Follow the mixing method and the supplier SDS. Wear the listed PPE. Do not mix incompatible oxidisers, acids or ammonia.
- Gloves and splash goggles. Work in ventilation. Do not mix with bleach, acids or anionic washing-up liquid — they cancel a quat.
- Measure 1 ml of BAC 50 into a clean litre jug or trigger bottle, then top up with 999 ml of cold water (about 500 ppm BAC — Zoflora’s 1:40 working band).
- Wipe hard surfaces and leave the contact time on your chosen guidance. Keep pets off until dry. Not for vivaria or aquariums.
- 5 litres of BAC 50 at 1 ml per litre makes about 5,000 litres of working disinfectant — hundreds of 500 ml Zoflora bottles.
- Label the bottle. Make fresh weekly; do not store mixed with perfume oils that cloud the quat.
Dilution recipe
1 L working batch
Working strength 1 ml BAC 50 + 999 ml water ≈ Zoflora 1:40 working strength. Educational estimate from the listed ratio — check the SDS before you mix.
Chemical
1 millilitres
Benzalkonium chloride (BAC 50)
Water
1 litres
Carrier / diluent
0% concentrate · 100% water by working volume (solids are dissolved into the water share).
Required PPE
Loading calculator…
Side-by-Side Price & Potency Comparison
Head-to-head comparison
| Measure | Retail brandedZoflora | Raw active dupeDupeStack |
|---|---|---|
| Product | Concentrated Multipurpose DisinfectantAmazon UK search — listing, not a confirmed seller | Benzalkonium chloride (BAC 50) |
| Pack / unit | 500 millilitres · £4.50 | 5 litres · £19.99 |
| Active | Benzalkonium chloride at 1.87%Carrier: Ethanol (about 65–75%) and perfume compound | 50% bulkC22H40ClN |
| CAS number | Not disclosed on pack | 68424-85-1 |
| Working strength | Ready-to-use pack | Dilute 1 ml BAC 50 + 999 ml water ≈ Zoflora 1:40 working strength |
| Cost per litre | £9.00 / L typical pack | £0.00 / L mixed from bulk |
| Headline saving | Baseline | 92% cheaper |
| COSHH / PPE | Follow the branded SDS | Gloves. Chemical-resistant gloves (nitrile or neoprene)Eye protection. Indirect-vent splash goggles — not ordinary spectaclesVentilation. Use outdoors or with mechanical extraction |
Active ingredient and cheaper alternative — FAQ
Is Zoflora the same as Patio Magic?
Same active family: benzalkonium chloride (CAS 68424-85-1). Patio Magic is around 10% BAC for exterior algae. Zoflora is about 1.87% BAC in ethanol plus perfume, then diluted 1:40 for indoor surfaces. Do not use patio-strength BAC neat on kitchen worktops.
Will DIY BAC smell like Country Garden?
No. The television advert is the perfume compound. Bulk BAC 50 is the disinfectant. Add a drop of your own fragrance if you want a scent — that is optional, not the biocide.
How do you mix the Concentrated Multipurpose Disinfectant dupe stack?
Gloves and splash goggles. Work in ventilation. Do not mix with bleach, acids or anionic washing-up liquid — they cancel a quat. Measure 1 ml of BAC 50 into a clean litre jug or trigger bottle, then top up with 999 ml of cold water (about 500 ppm BAC — Zoflora’s 1:40 working band). Wipe hard surfaces and leave the contact time on your chosen guidance. Keep pets off until dry. Not for vivaria or aquariums. 5 litres of BAC 50 at 1 ml per litre makes about 5,000 litres of working disinfectant — hundreds of 500 ml Zoflora bottles. Label the bottle. Make fresh weekly; do not store mixed with perfume oils that cloud the quat.
DupeStack provides chemical concentration data and educational mixing guides only. Wellness pages compare food supplements, not medicines or prescribed treatments. Always review the supplier Safety Data Sheet (SDS) and comply with UK Health and Safety Executive (HSE) and COSHH regulations when handling concentrated substances. Mixing and storage are at your own risk. Some links are affiliate advertisements (Amazon Associates, eBay Partner Network, and Awin when those programmes are live). Commissions do not change listed concentrations or calculator output.
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£27.50Save 92% / L
Indicative DIY stack