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What are the ingredients in Universal Cleaner?Updated 8 days ago

TL;DR: Universal Cleaner contains two ingredients: potassium hydroxide and reverse osmosis water. It’s formulated at pH 12.5, has an 18-month shelf life from manufacture, and is Allergy UK certified.


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Koh Universal Cleaner product features
Koh Universal Cleaner two ingredient formula

What is in Universal Cleaner?

Koh Universal Cleaner has only two ingredients: potassium hydroxide and reverse osmosis water. Potassium hydroxide is an alkali degreaser that saponifies fats and oils, lifting tough grease and baked-on grime. Reverse osmosis water is the ultra-pure solvent that delivers a clean, streak-free finish without mineral residue. The simplicity of the formula is what allows Koh Universal Cleaner to clear independent allergy thresholds including Allergy UK certification.

✓ Potassium hydroxide

Alkali degreaser. Saponifies fats and oils into soap, lifting tough grease and baked-on grime.

Alkali degreaserSaponifies fats

✓ Reverse osmosis water

Ultra-pure solvent. Free of contaminants so no residue is left behind on surfaces.

Ultra-pureStreak-free

What’s the pH and shelf life of Universal Cleaner?

Koh Universal Cleaner is formulated at pH 12.5, which is alkaline. Shelf life is 18 months from date of manufacture, sealed and stored properly. Store in a cool, sealed, shaded location, out of direct sunlight.

pH level

12.5

Alkaline and grease-cutting.

Shelf life

18 months

From manufacture when sealed and stored properly.

Storage

Cool, sealed, shaded

Keep out of direct sunlight; don’t freeze or overheat.

What certifications does Universal Cleaner have?

Koh Universal Cleaner is Allergy UK certified, fragrance-free, cruelty-free, and not tested on animals. Because the formula is only potassium hydroxide and reverse osmosis water, there are no dyes, no preservatives, no bleach and no added fragrance in it at all. The simplicity of the two-ingredient formula is what lets Universal Cleaner clear independent allergy thresholds.

✓ Certified and tested

Allergy UK certified. Fragrance-free, cruelty-free, and not tested on animals.

Allergy UK certifiedCruelty-freeFragrance-free

✓ What’s not in it

With only two ingredients on the list, there is nothing else to declare. No dyes, no preservatives, no bleach, no added fragrance. Shipped across the UK from Koh UK.

No dyesNo preservativesNo bleachUK delivery

Where can I find the Safety Data Sheet?

The Universal Cleaner Safety Data Sheet (SDS) covers composition, physical properties, handling, storage, disposal, and emergency response. Most home users never need to open it, but it is available anytime as a PDF download.

✓ Access Universal Cleaner SDS

The Safety Data Sheet covers composition, physical properties, handling, storage, disposal, and emergency response.

Download SDS PDF
Koh Universal Cleaner 2L

Universal Cleaner

2L bag-in-box refill. The same two-ingredient formula in our most popular size.

Browse all Universal Cleaner articles

Last reviewed: August 2026 · Koh UK

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