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Is Universal Cleaner chemical-free?Updated 12 days ago

TL;DR: Not technically. Universal Cleaner isn't chemical-free because water and potassium hydroxide are both chemicals. But it's free from the harsh chemicals, fragrances, phosphates, parabens, bleach, and additives found in most conventional cleaning products. Just two simple ingredients. Allergy UK certified and independently verified by GECA (Good Environmental Choice Australia), Sensitive Choice (National Asthma Council of Australia), and the Eczema Association of Australasia. Made in Australia, shipped to the UK from Koh UK.


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Koh Universal Cleaner safe for homes and surfaces
Koh Universal Cleaner GECA eco-certified (Good Environmental Choice Australia)

Is Universal Cleaner chemical-free?

Not technically. Everything is made of chemicals, including water (H2O). The more useful question is which chemicals a product contains and whether they're safe. Koh Universal Cleaner contains just two ingredients: potassium hydroxide (the alkali degreaser that does the cleaning work) and reverse osmosis water (an ultra-pure solvent). It's free from fragrances, phosphates, parabens, chlorine, bleach, harsh surfactants, dyes, preservatives, and animal-derived ingredients. The common nasties found in most conventional cleaning products are not in the formula.

✓ What's in the box

Everything is made of chemicals, including water (H₂O). The more useful question is which chemicals a product contains and whether they're safe. Universal Cleaner contains just two: potassium hydroxide (alkali degreaser) and reverse osmosis water (ultra-pure solvent).

Potassium hydroxide Reverse osmosis water

⚠ What's not in the box

No fragrances, phosphates, parabens, chlorine, bleach, harsh surfactants, dyes, preservatives, or animal-derived ingredients. The common nasties in conventional cleaners are not here.

No fragrance No phosphates No parabens No bleach

Is Universal Cleaner safe for homes with kids, pets, and sensitivities?

Yes. Koh Universal Cleaner holds independent certifications for sensitivity, eco impact, and ethical credentials. Allergy UK certified. GECA (Good Environmental Choice Australia) eco-certified since 2016. Sensitive Choice approved by the National Asthma Council of Australia for people with asthma and sensitive skin. Eczema Association of Australasia certified. Vegan and cruelty-free. Manufactured in Australia, shipped across the UK from Koh UK. The two-ingredient, fragrance-free formula is what allows Koh Universal Cleaner to meet these independent thresholds. Fewer additives means fewer irritants and allergens. Pet-friendly, kid-friendly, and family-friendly when used as directed.

✓ Independent credentials

Allergy UK certified. GECA (Good Environmental Choice Australia) eco-certified since 2016. Sensitive Choice approved by the National Asthma Council of Australia for people with asthma and sensitive skin. Eczema Association of Australasia certified. Vegan. Cruelty-free. Manufactured in Australia, shipped across the UK from Koh UK. The two-ingredient, fragrance-free formula is what allows Universal Cleaner to meet these independent thresholds. Fewer additives means fewer irritants and allergens.

Allergy UK GECA (Australia) Sensitive Choice Eczema Association Vegan Cruelty-free Pet-friendly Kid-friendly
Koh Universal Cleaner 2L

Universal Cleaner

2L bag-in-box refill. The same two-ingredient formula in our most popular size. Approximately 3 months of cleaning for the average UK home.

Browse all Universal Cleaner products →

Last reviewed: May 2026 · Koh UK

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