Household cleaning
Boots / first-aid brands Hydrogen Peroxide Solution 3% dupe
Why pay around £1.80 for Boots / first-aid brands? The bulk active is Hydrogen peroxide 12% (40-volume cream peroxide / technical) — 78% less per working litre than a typical shelf pack.
From the retail pack to the active and the mix
1 · Retail
Boots / first-aid brands Hydrogen Peroxide Solution 3%
200 millilitres · £1.80 typical snapshot
Water and stabiliser (often phosphoric acid, ppm)
2 · Active
Hydrogen peroxide
3% on the label
7722-84-1H2O2
Bulk Hydrogen peroxide 12% (40-volume cream peroxide / technical)
3 · Mix
1:3 (1 part 12% + 3 parts water → 3%)
£2.00 per working litre · 78% less than the shelf pack
- Active
- Hydrogen peroxide
- CAS
- 7722-84-1
- Dupe
- Hydrogen peroxide 12% (40-volume cream peroxide / technical)
- Saving
- 78% / 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
“First-aid antiseptic and household stain oxidiser”
The chemical reality
3% is 10-volume peroxide. Hair-developer 12% (40-volume) diluted 1:3 is the same 3% oxidiser in litres, not 200 ml pharmacy bottles. Do not drink it. Do not use 12% on skin undiluted.
Active vs filler
3% Hydrogen peroxide · 97% carrier / filler — Water and stabiliser (often phosphoric acid, ppm)
- Typical retail
- £1.80
- 200 millilitres
- Estimated active cost
- £0.40
- Scaled from bulk £7.99 / 1 litre
- Indicative markup
- 4.5×
- Snapshot maths, not a live shop price
The Marketing Claim & The Catch
A 200 millilitres pack of Boots / first-aid brands Hydrogen Peroxide Solution 3% typically retails around £1.80 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: First-aid antiseptic and household stain oxidiser; and Pharmacy-grade 10-volume peroxide.
The catch: 3% is 10-volume peroxide. Hair-developer 12% (40-volume) diluted 1:3 is the same 3% oxidiser in litres, not 200 ml pharmacy bottles. Do not drink it. Do not use 12% on skin undiluted.
- “First-aid antiseptic and household stain oxidiser”
- “Pharmacy-grade 10-volume peroxide”
Proprietary Blend & Dosage Breakdown
The labelled active is Hydrogen peroxide at 3%. Everything else in the pack is water and stabiliser (often phosphoric acid, ppm).
At 3% 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 12% Hydrogen peroxide 12% (40-volume cream peroxide / technical), mixed to 1:3 (1 part 12% + 3 parts water → 3%).
- Labelled active
- Hydrogen peroxide
- 3%
- Carrier
- Water and stabiliser (often phosphoric acid, ppm)
- Retail pack
- 200 millilitres · £1.80
The Active Chemical Alternative (Dupe Stack)
The dupe stack is Hydrogen peroxide 12% (40-volume cream peroxide / technical) at 12% bulk. Indexed as CAS 7722-84-1, formula H2O2. Buy it as 1 litre for around £7.99 from Amazon UK.
Working strength: 1:3 (1 part 12% + 3 parts water → 3%). Indicative cost £2.00 per diluted litre — 78% 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.
- 12% burns skin. Gloves and goggles. Always add peroxide to water.
- 1 part 12% + 3 parts water makes 3% (10-volume). 1 litre of 12% makes 4 litres of 3%.
- Use 3% on hard surfaces and some stains. Do not mix with vinegar (peracetic acid) or bleach unless you know the chemistry.
- A 200 ml first-aid bottle is £9/L of 3%. Diluted bulk is about £2/L of 3%.
Dilution recipe
1 L working batch
Working strength 1:3 (1 part 12% + 3 parts water → 3%). Educational estimate from the listed ratio — check the SDS before you mix.
Chemical
250 millilitres
Hydrogen peroxide 12% (40-volume cream peroxide / technical)
Water
0.75 litres
Carrier / diluent
25% concentrate · 75% 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 brandedBoots / first-aid brands | Raw active dupeDupeStack |
|---|---|---|
| Product | Hydrogen Peroxide Solution 3%Amazon UK search — listing, not a confirmed seller | Hydrogen peroxide 12% (40-volume cream peroxide / technical) |
| Pack / unit | 200 millilitres · £1.80 | 1 litre · £7.99 |
| Active | Hydrogen peroxide at 3%Carrier: Water and stabiliser (often phosphoric acid, ppm) | 12% bulkH2O2 |
| CAS number | Not disclosed on pack | 7722-84-1 |
| Working strength | Ready-to-use pack | Dilute 1:3 (1 part 12% + 3 parts water → 3%) |
| Cost per litre | £9.00 / L typical pack | £2.00 / L mixed from bulk |
| Headline saving | Baseline | 78% cheaper |
| COSHH / PPE | Follow the branded SDS | Gloves. Chemical-resistant gloves (nitrile or neoprene)Eye protection. Indirect-vent splash goggles — not ordinary spectacles |
Active ingredient and cheaper alternative — FAQ
What is the active ingredient in Boots / first-aid brands?
Boots / first-aid brands Hydrogen Peroxide Solution 3% is labelled as Hydrogen peroxide at 3%. The carrier is Water and stabiliser (often phosphoric acid, ppm). Pack size: 200 millilitres. The bulk equivalent we index is Hydrogen peroxide 12% (40-volume cream peroxide / technical) (CAS 7722-84-1).
Is Hydrogen peroxide 12% (40-volume cream peroxide / technical) safe on the intended surface?
Used at the listed working strength (1:3 (1 part 12% + 3 parts water → 3%)), the dupe is the same chemistry as the branded pack for kettles, ceramics and washable hard surfaces. That is not a blanket all-clear: read the supplier SDS, wear the listed PPE, keep acids away from hypochlorite, and follow UK HSE/COSHH rules. Wellness teardowns are supplements, not medicines.
Is there a cheaper alternative to Boots / first-aid brands Hydrogen Peroxide Solution 3%?
Yes. The bulk equivalent is Hydrogen peroxide 12% (40-volume cream peroxide / technical) (CAS 7722-84-1). Indicative saving 78% per working litre versus a pack that typically retails around £1.80. Working strength: 1:3 (1 part 12% + 3 parts water → 3%). Live shop prices move.
How do you mix the Hydrogen Peroxide Solution 3% dupe stack?
12% burns skin. Gloves and goggles. Always add peroxide to water. 1 part 12% + 3 parts water makes 3% (10-volume). 1 litre of 12% makes 4 litres of 3%. Use 3% on hard surfaces and some stains. Do not mix with vinegar (peracetic acid) or bleach unless you know the chemistry. A 200 ml first-aid bottle is £9/L of 3%. Diluted bulk is about £2/L of 3%.
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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