At Koh, we often talk about eliminating "chemical nasties" from your home. But what exactly does that mean? In short, it refers to a long list of ingredients commonly found in conventional cleaning products that have been linked to serious health concerns. These include endocrine-disrupting chemicals (EDCs) like phthalates, volatile organic compounds (VOCs), and harsh ingredients like bleach and ammonia.
Let’s break down what each of these chemical nasties are, how they impact your health, and why you won’t find any of them in Koh.
1. Endocrine disrupting chemicals (EDCs)
EDCs are substances that can interfere with your body’s hormonal system. One of the most common EDCs found in household products are phthalates, which are often used to help fragrances stick to surfaces so they last longer.
Why it matters: Phthalates have been linked to a range of serious health concerns including hormone disruption, fertility issues, developmental problems in children, and even certain cancers. They are particularly concerning because they can affect human health at very low levels and accumulate in the body over time.
Where they hide: Usually hidden behind the word "fragrance" on ingredient labels, phthalates don’t need to be disclosed, making them especially tricky to avoid.
Koh's approach: We don’t use synthetic fragrances in any of our products. That means no phthalates. Our entire range is formulated to be free from EDCs, for a safer clean every time.
2. Volatile organic compounds (VOCs)
VOCs are gases released from products like sprays, disinfectants, and air fresheners. While the word "organic" may sound harmless, these compounds are anything but.
Why it matters: VOCs contribute to indoor air pollution and have been linked to a number of health problems, including headaches, asthma, allergic reactions, respiratory irritation, and long-term lung damage. A 20-year study even found that regular use of traditional cleaning sprays was as harmful to lung health as smoking 20 cigarettes a day.
Where they hide: Often found in fragranced cleaners, glass sprays, aerosol products, and multi-surface disinfectants.
Koh's approach: Our products are independently tested and certified to be VOC-free. That means safer air in your home and a cleaner you can actually feel good about using.
3. Other harmful chemicals: bleach, ammonia, and beyond
Conventional cleaning products often rely on highly corrosive ingredients like bleach and ammonia for their stain-fighting power.
Why it matters: These substances can irritate your eyes, skin, and respiratory system. Exposure is particularly risky for people with asthma, allergies, or sensitive skin. When mixed (intentionally or not), bleach and ammonia can even create toxic chloramine vapours.
Where they hide: Bleach is common in toilet bowl cleaners and mould removers. Ammonia is frequently used in glass and surface sprays.
Koh's approach: Our Universal Cleaner delivers high performance without any of the harsh stuff. No bleach. No ammonia. Just a powerful, science-backed formula made with purified water and a trace of potassium hydroxide - the same compound used in liquid soap.
Backed by trusted certifications
We don’t just say we’re safe. We prove it. Koh is:
GECA certified, which means our products are independently verified to meet strict criteria across human health, environmental impact, ethical manufacturing, and product performance.
Sensitive Choice approved, a program by the National Asthma Council of Australia that identifies products safer for asthma and allergy-prone households.
Allergy UK approved, Koh Universal Cleaner passed a human clinical trial on people with diagnosed chemical sensitivities.
The bottom line
Chemical nasties are everywhere in traditional cleaning – even when they’re not listed on the label. At Koh, we keep things simple, effective, and transparent. That means no EDCs, no VOCs, no hidden toxins. Just safer, smarter cleaning for you, your family, and the planet.
