Consumer advocacy teardown
Kleen Off Ammonia Multi-Purpose Cleaner alternative & active ingredient dupe
Stop paying £2.49 for Jeyes. The bulk active is Household ammonia 9–10% (ammonium hydroxide) — 64% less per working litre than a typical pack.
- Active
- Ammonium hydroxide
- CAS
- 1336-21-6
- Dupe
- Household ammonia 9–10% (ammonium hydroxide)
- Saving
- 64% / 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.
The Marketing Claim & The Catch
A typical 500 millilitres pack of Jeyes Kleen Off Ammonia Multi-Purpose Cleaner is about £2.49 in household cleaning. That is a snapshot, not a live Amazon price — listings, sizes and deals move. The marketing line is that you are buying a finished lifestyle product, not a weighed chemical.
On the pack: Cuts grease on ovens, glass and tiles; and Traditional ammonia cleaner — no perfume theatre.
The catch: UK Windolene is no longer ammonia. Kleen Off still is: a ~9–10% ammonium hydroxide solution in a 500 ml bottle. A 5 litre jerry of 10% household ammonia is the same molecule. Never mix it with bleach. The catch is the fumes, not a secret surfactant.
- “Cuts grease on ovens, glass and tiles”
- “Traditional ammonia cleaner — no perfume theatre”
Proprietary Blend & Dosage Breakdown
The labelled active is Ammonium hydroxide at 9.5%. Everything else in the pack is water.
At 9.5% 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 10% Household ammonia 9–10% (ammonium hydroxide), mixed to 1:9 (about 1% working for glass and paintwork).
- Labelled active
- Ammonium hydroxide
- 9.5%
- Carrier
- Water
- Retail pack
- 500 millilitres · £2.49
The Active Chemical Alternative (Dupe Stack)
The dupe stack is Household ammonia 9–10% (ammonium hydroxide) at 10% bulk. Indexed as CAS 1336-21-6, formula NH4OH. Buy it as 5 litres for about £8.99 from Amazon UK.
Working strength: 1:9 (about 1% working for glass and paintwork). Indicative cost £0.18 per diluted litre — 64% 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.
- Corrosive fumes. Gloves, goggles, open windows. Never mix with bleach or acids — chloramine or heat.
- For glass and paint: 1 part 10% ammonia + 9 parts water. Wipe with a lint-free cloth. Do not use on brass or aluminium if it dulls.
- A saucer of neat 10% in a cold oven overnight is the old oven trick — ventilation afterwards. This is not Oven Pride (that is NaOH).
- 5 litres of 10% makes about 50 litres of 1% working mix.
Mixing desk
Dilution calculator
Switch between filling a sprayer and covering a measured surface. Figures are educational estimates from the listed ratio — always check the SDS.
Formula
Household ammonia 9–10% (ammonium hydroxide)
- Concentrate
- 100 ml
- millilitres of liquid
- Water
- 0.9 L
- carrier volume
- Batch cost
- £0.18
- 1 L working solution
- Saved vs retail
- £4.80
- 96% · retail £4.98
Estimated coverage at the listed rate: 10 m².
Side-by-Side Price & Potency Comparison
Head-to-head comparison
| Measure | Retail brandedJeyes | Raw active dupeDupeStack |
|---|---|---|
| Product | Kleen Off Ammonia Multi-Purpose CleanerAmazon UK search — listing, not a confirmed seller | Household ammonia 9–10% (ammonium hydroxide) |
| Pack / unit | 500 millilitres · £2.49 | 5 litres · £8.99 |
| Active | Ammonium hydroxide at 9.5%Carrier: Water | 10% bulkNH4OH |
| CAS number | Not disclosed on pack | 1336-21-6 |
| Working strength | Ready-to-use pack | Dilute 1:9 (about 1% working for glass and paintwork) |
| Cost per litre | £4.98 / L typical pack | £0.18 / L mixed from bulk |
| Headline saving | Baseline | 64% 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
What is the active ingredient in Jeyes?
Jeyes Kleen Off Ammonia Multi-Purpose Cleaner is labelled as Ammonium hydroxide at 9.5%. The carrier is Water. Pack size: 500 millilitres. The bulk equivalent we index is Household ammonia 9–10% (ammonium hydroxide) (CAS 1336-21-6).
Is Household ammonia 9–10% (ammonium hydroxide) safe on the intended surface?
Used at the listed working strength (1:9 (about 1% working for glass and paintwork)), 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 Jeyes Kleen Off Ammonia Multi-Purpose Cleaner?
Yes. The bulk equivalent is Household ammonia 9–10% (ammonium hydroxide) (CAS 1336-21-6). Indicative saving 64% per working litre versus a typical £2.49 pack. Working strength: 1:9 (about 1% working for glass and paintwork). Live shop prices move.
How do you mix the Kleen Off Ammonia Multi-Purpose Cleaner dupe stack?
Corrosive fumes. Gloves, goggles, open windows. Never mix with bleach or acids — chloramine or heat. For glass and paint: 1 part 10% ammonia + 9 parts water. Wipe with a lint-free cloth. Do not use on brass or aluminium if it dulls. A saucer of neat 10% in a cold oven overnight is the old oven trick — ventilation afterwards. This is not Oven Pride (that is NaOH). 5 litres of 10% makes about 50 litres of 1% working mix.
DupeStack provides chemical concentration data and educational mixing guides. Always review official manufacturer Safety Data Sheets (SDS) and comply with UK Health and Safety Executive (HSE) and COSHH regulations when handling concentrated substances. Some links on this site are affiliate links.
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DIY stack · 64% / L vs branded
£16.50indicative kit · Amazon cannot add a mixed search kit as one basket