The Hidden Dangers of Common Marine Cleaning Ingredients

By the DiTEC Marine Team · Last updated: June 2026 · 5 min read

Every day, we use a variety of chemicals in our homes without giving much thought to their potential dangers. The same chemicals show up in many popular marine cleaning products — where they pose real risks to your health, your boat, and the water you’re working over. Understanding what they actually do is the first step toward making safer choices.

Here’s a closer look at why these ten common ingredients — acids, bleach, alkylphenol ethoxylates, phosphates, nitrates, ammonia, thickeners, dyes, optical brighteners, and sodium hydroxide — are harmful to you and to the marine environment.

1. Acids

Health risks. Acids like hydrochloric acid and sulfuric acid are found in toilet bowl cleaners, descalers, rust removers, and several legacy two-part teak cleaning systems. They’re highly corrosive and can cause severe burns on skin contact. Inhalation of acidic fumes irritates the respiratory tract, leading to coughing, shortness of breath, and potential long-term lung damage.

Environmental impact. When acids like the hydrochloric acid and acid colorants found in common teak cleaners are washed into waterways, they lower the pH of water bodies, harm aquatic life, and disrupt ecosystems. Acid spills also damage soil quality and affect plant life on shore.

2. Bleach

Health risks. Bleach (sodium hypochlorite) shows up in household disinfectants, laundry whiteners, mold removers, and many marine all-purpose cleaners. It’s a strong irritant that causes respiratory issues, skin irritation, and eye damage. Mix it with ammonia or acid-based cleaners and it releases toxic chlorine gas — a serious inhalation hazard, especially in tight engine rooms or heads.

Environmental impact. Bleach contributes to the formation of toxic byproducts like dioxins, which persist in the environment and accumulate in the food chain — posing long-term ecological and health risks well past the moment the cleaner went down the drain.

3. Alkylphenol Ethoxylates (APEs)

Health risks. APEs — including nonylphenol ethoxylates — are common surfactants in detergents, disinfectants, and all-purpose cleaners. They’re endocrine disruptors that interfere with hormone function in humans and animals, with documented potential for reproductive and developmental effects.

Environmental impact. APEs are persistent in the environment and break down into more toxic compounds that accumulate in the food chain, affecting wildlife and ecosystems for years after a single use.

4. Phosphates

Health risks. Phosphates are used in dishwashing detergents, laundry detergents, and fertilizers. They’re generally less acutely toxic to humans than the chemicals above, but can cause skin irritation and have been linked to kidney damage with prolonged exposure.

Environmental impact. Phosphates drive eutrophication in water bodies — runaway algae growth that depletes oxygen and creates dead zones where aquatic life cannot survive. The chemical you rinsed off the deck this morning can be feeding an algae bloom in the bay a few weeks from now.

5. Nitrates

Health risks. Nitrates appear in fertilizers, food preservatives, and some cleaning agents. Ingesting high levels causes methemoglobinemia (“blue baby syndrome”) in infants, which impairs the blood’s ability to carry oxygen. Long-term exposure has been linked to thyroid issues and several cancers.

Environmental impact. Like phosphates, nitrates contribute to water pollution and eutrophication — harming aquatic ecosystems and contaminating drinking water supplies downstream.

6. Ammonia

Health risks. Ammonia is used in glass cleaners, floor cleaners, and fertilizers. It’s a potent irritant that can cause burns to the skin, eyes, and respiratory tract. Inhalation of ammonia fumes leads to coughing, wheezing, and in higher concentrations severe respiratory distress.

Environmental impact. Ammonia is directly toxic to aquatic organisms and contributes to nutrient pollution in water bodies, driving the same eutrophication cycle as phosphates and nitrates.

7. Thickeners

Health risks. Synthetic thickeners are used to give cleaning agents body and cling. Some can cause skin irritation and allergic reactions, particularly in people with sensitive skin or existing dermatological conditions.

Environmental impact. Certain thickeners, like carbomers, break down into microplastics that accumulate in water bodies and contribute to the broader plastic pollution problem affecting marine life.

8. Synthetic Dyes

Health risks. Synthetic dyes used in laundry detergents, cleaning products, and personal care items can cause skin irritation and allergic reactions. Many are petroleum-derived and may contain harmful contaminants, including heavy metals.

Environmental impact. Synthetic dyes persist in the environment, contaminate water bodies, and pose risks to aquatic organisms — adding to the overall pollution load in ecosystems without performing any cleaning function.

9. Optical Brighteners

Health risks. Optical brighteners are added to laundry detergents and paper products to make them appear whiter and brighter under UV light. They can cause skin irritation and allergic reactions in sensitive individuals.

Environmental impact. Optical brighteners are not readily biodegradable. They accumulate in water bodies, where they can interfere with normal biological processes in aquatic life and add to the cumulative chemical burden in ecosystems.

10. Sodium Hydroxide

Health risks. Sodium hydroxide — industrial caustic soda — is used in soaps, dyes, drain cleaners, and as the primary active ingredient in common teak cleaners. It’s highly corrosive and causes severe burns to skin and eyes on contact. Inhaling its dust or mist leads to respiratory injury, including severe irritation of the nasal passages and lungs.

Environmental impact. Released into water bodies, sodium hydroxide drastically alters pH and harms aquatic life and plants. Its high reactivity also degrades soil and impacts biodiversity. Safe handling and disposal practices are critical — and even those don’t eliminate the underlying hazard.

How DiTEC is different

Understanding what’s in a bottle is the first step toward making informed choices about the products you bring on board. DiTEC’s marine cleaning products are formulated without any of the chemicals or additives listed above.

Our cleaners are readily biodegradable and safe for waterways — per our Safety Data Sheets, they can be discharged directly into water, at full concentrate or diluted in wash water, without harming the marine environment. Teak Magic uses FDA-GRAS (Generally Recognized As Safe) ingredients in place of the hydrochloric acid and sodium hydroxide found in legacy two-part teak systems — the same regulatory bar applied to food ingredients.

Choosing safer cleaning chemistry protects your health, your crew, and the water you love — without giving up cleaning power. Always read labels, follow safety guidelines, and consider switching to less hazardous alternatives wherever you can.

Disclaimer & sources. This article summarizes publicly available information on common cleaning-product ingredients and their documented health and environmental effects. Always consult the current manufacturer documentation for any product before use.