The Cleaning Ingredients Glossary
If you run everything through Yuka or Think Dirty before it touches your counter, this is for you.
Cleaning labels are written in a language most of us were never taught. This glossary translates 45 of the most common ingredients and label terms into plain English — what each one is, the honest science on whether it's a real hazard or an internet myth, where it hides, and the safer swap. Every entry links to real sources you can check yourself.
Surfactants & Detergents
The molecules that actually lift grease and dirt — the good, the harsh, and the plant-based.
- Alkyl Sulfates Alkyl sulfates are a class of high-foaming anionic surfactants — usually sodium salts made from fatty alcohols. SLS is the best-known member. They clean and lather strongly, and are common in shampoos, dish soaps and detergents.
- Cocamide DEA Cocamide DEA is a coconut-derived foaming agent and thickener made by reacting coconut fatty acids with diethanolamine. It's the one 'coconut-based' surfactant worth a closer look: California lists it as a cancer-risk chemical and it can help form nitrosamines.
- Cocamidopropyl Betaine Cocamidopropyl betaine (CAPB) is a mild, coconut-derived amphoteric surfactant used to boost foam and soften harsher cleaners in shampoos, body washes and dish soaps. It's gentle for most people, but it's a recognized contact allergen for some.
- Decyl Glucoside Decyl glucoside is a mild, plant-derived nonionic surfactant made from corn glucose and coconut fatty alcohols. It's one of the gentlest cleansing agents available and a common stand-in for harsher sulfates in low-tox cleaners and baby products.
- Ethanolamines (MEA, DEA, TEA) Ethanolamines — monoethanolamine (MEA), diethanolamine (DEA) and triethanolamine (TEA) — are a family of ingredients used in cleaners to adjust pH, emulsify and cut grease. Their main concern is that they can help form nitrosamines, a group of carcinogenic contaminants.
- Nonylphenol Ethoxylates (NPEs) Nonylphenol ethoxylates (NPEs) are petroleum-based nonionic surfactants once common in detergents and industrial cleaners. They break down into nonylphenol, an endocrine disruptor that persists in water — which is why the EU has essentially phased them out and the U.S. EPA has moved to restrict them.
- Sodium Laureth Sulfate (SLES) Sodium laureth sulfate (SLES) is a foaming, grease-cutting anionic surfactant found in shampoos, dish soaps and body washes. It's milder on skin than its cousin SLS, but the way it's made can leave behind a hidden contaminant: 1,4-dioxane.
- Sodium Lauryl Sulfate (SLS) Sodium lauryl sulfate (SLS) is a strong, high-foaming anionic surfactant used in toothpaste, shampoo, dish soap and many household cleaners. It's a well-documented skin and eye irritant for some people — but, contrary to viral posts, it is not a proven carcinogen.
Preservatives
What keeps a bottle from growing bacteria — and which ones release formaldehyde or trigger allergies.
- Benzisothiazolinone (BIT) Benzisothiazolinone is a synthetic preservative from the isothiazolinone family, used to protect water-based cleaners, detergents, paints, and adhesives from bacteria and mold. It is an established skin sensitizer whose allergy rates have risen sharply in recent years.
- DMDM Hydantoin DMDM hydantoin is a synthetic preservative that slowly releases small amounts of formaldehyde over time to stop bacteria and mold from growing. It is common in shampoos, liquid soaps, and some cleaning products, and is a recognized skin allergen.
- Formaldehyde Formaldehyde is a colorless, strong-smelling gas used as a preservative and disinfectant, and released by certain preservatives in cleaning and personal care products. The International Agency for Research on Cancer classifies it as a Group 1 human carcinogen.
- Methylchloroisothiazolinone (CMIT/MI) Methylchloroisothiazolinone is a synthetic preservative, usually blended with methylisothiazolinone in a mix known as Kathon CG, used to keep water-based cleaners, detergents, and personal care products from spoiling. It is a well-documented cause of preservative skin allergy.
- Methylisothiazolinone (MIT) Methylisothiazolinone is a synthetic preservative used to stop bacteria and mold from growing in water-based products like all-purpose sprays, dish soaps, laundry detergents, and wet wipes. It is one of the most common causes of preservative-related skin allergy.
- Quaternium-15 Quaternium-15 is a synthetic preservative that acts as a formaldehyde releaser, giving off small amounts of formaldehyde to prevent microbial growth in water-based products. It is one of the more common causes of allergic contact dermatitis on the hands.
Disinfectants & Sanitizers
The germ-killing agents. Powerful, but not always something you want misting over a kitchen counter.
- Benzalkonium Chloride Benzalkonium chloride is a quaternary ammonium disinfectant (a "quat") used as an antimicrobial active ingredient in many surface disinfectants, sanitizers, and wipes. It is an EPA-registered pesticide that is also a documented skin and respiratory sensitizer.
- Hydrogen Peroxide Hydrogen peroxide is an oxidizing disinfectant and bleaching agent that breaks down into water and oxygen, leaving no lasting residue. At common household strength (about 3%) it is one of the more benign disinfectant options.
- Quaternary Ammonium Compounds (Quats) Quaternary ammonium compounds, or "quats," are a family of antimicrobial chemicals used as the active disinfecting ingredient in many sprays, wipes, and sanitizers. They are effective germ-killers but are also linked to asthma and skin sensitization.
- Sodium Hypochlorite (Chlorine Bleach) Sodium hypochlorite is the active ingredient in ordinary chlorine bleach, a strong oxidizing disinfectant and whitener. It is effective but its fumes irritate the eyes and airways, and it must never be mixed with ammonia or acids.
- Triclosan Triclosan is a synthetic antibacterial and antifungal agent once common in soaps, cleaners, and personal care products. In 2016 the FDA banned it from over-the-counter antibacterial hand and body soaps, citing unproven benefit and safety concerns.
Solvents
The "cut-through-anything" chemicals — and the fumes some of them leave in your air.
- 2-Butoxyethanol 2-Butoxyethanol is a glycol-ether solvent used in many glass, all-purpose, and heavy-duty cleaners because it cuts grease well. It's a clear liquid with a faint ether-like smell.
- Ammonia Ammonia is a sharp-smelling alkaline compound used in glass cleaners and some all-purpose sprays because it leaves a streak-free shine. Its fumes are irritating, and it must never be mixed with bleach.
- Glycol Ethers Glycol ethers are a family of solvents that dissolve both oil and water, which makes them strong grease-cutters in glass, all-purpose, and industrial cleaners. EPA lists the class as hazardous air pollutants.
Fragrance & Scent
The single word "fragrance" can hide a long list. Here is what actually makes a cleaner smell.
- Fragrance vs. Parfum "Fragrance" and "parfum" are the same thing: two words for a single undisclosed scent mixture on a label. Both let a maker hide many individual scent chemicals as one trade-secret ingredient.
- Limonene Limonene is a citrus-derived terpene that gives cleaners a fresh orange or lemon scent and helps cut grease. It's plant-based, but it can oxidize into skin sensitizers and react with indoor ozone.
- Phthalates Phthalates are a group of chemicals used to make scents last longer and plastics more flexible. In cleaners they usually ride along inside "fragrance," and several are linked to hormone disruption.
- Synthetic Musks Synthetic musks are lab-made scent chemicals that give cleaners and detergents a warm, lingering "clean" smell. Two common ones, galaxolide and tonalide, persist in the environment and build up in living tissue.
Builders & Chelators
The behind-the-scenes helpers that soften water and boost cleaning power.
- EDTA (Ethylenediaminetetraacetic Acid) EDTA is a synthetic chelator that grabs onto metal ions in hard water so soaps and preservatives work better. It's effective and widely used, but it breaks down very slowly in nature, which is its main environmental knock.
- Phosphates Phosphates are mineral-based builders that soften water and boost detergent power by binding calcium and magnesium. They clean well but feed algae downstream, so they've been largely phased out of laundry and dishwasher detergents.
- Sodium Carbonate (Washing Soda) Sodium carbonate, or washing soda, is a strongly alkaline mineral salt used as a detergent booster and water softener. It raises a wash's pH to cut grease and binds the calcium and magnesium in hard water so detergent works better.
Plant-Based & Mineral Ingredients
The pantry-simple ingredients — acids, salts, and minerals doing real work.
- Citric Acid Citric acid is a mild, plant-derived acid made by fermenting sugar with a natural mold. In cleaners it dissolves hard-water scale, soap scum and rust, and it nudges the pH of a formula down so it stays stable.
- Essential Oils Essential oils are concentrated aromatic plant extracts used to scent and sometimes clean naturally. They're plant-based, but concentrated, and not automatically "safe": they can trigger allergies and are risky around cats.
- Lactic Acid Lactic acid is a mild, fermentation-made organic acid similar in spirit to vinegar or lemon juice. In cleaners it descales, cuts soap scum and lowers pH, and it can help keep water-based formulas microbially stable.
- Sodium Bicarbonate (Baking Soda) Sodium bicarbonate, plain baking soda, is a mild mineral salt that works as a gentle abrasive and odor neutralizer. Sprinkled on a damp sponge it scrubs without scratching, and its mild alkalinity helps lift grease and absorb smells.
Enzymes
Biological stain-eaters that break down protein, starch, and grease.
Terms & Concepts
The vocabulary on every label — what the words actually mean.
- 1,4-Dioxane 1,4-Dioxane is a trace contaminant, not an added ingredient. It forms as a byproduct when surfactants are 'ethoxylated,' and it hitchhikes into shampoos, dish soaps and detergents. The EPA classifies it as a likely human carcinogen — and it never appears on a label.
- Optical Brighteners Optical brighteners are fluorescent dyes added to laundry detergents to make fabric look whiter and brighter. They don't actually clean; they absorb UV light and re-emit blue light to trick the eye.
- PFAS ("Forever Chemicals") PFAS are a large group of human-made "forever chemicals" that resist water, oil, and stains and barely break down. They can turn up in some cleaning and stain-resistant products.
- Readily Biodegradable "Readily biodegradable" is a strict, defined lab standard: under OECD 301 tests an ingredient must break down by about 60% within a tight time window, generally 28 days. It's far more meaningful than a vague "biodegradable" claim on packaging.
- Saponification Saponification is the chemical reaction that turns fats or oils and lye into soap and glycerin. It's the oldest cleaning chemistry there is — the reason a bar of true soap exists at all.
- Surfactant A surfactant is a 'surface active agent' — the workhorse molecule in almost every cleaner. It lowers water's surface tension so it can spread, then grabs onto oil and dirt and lifts them off a surface into the rinse water.
- Volatile Organic Compound (VOC) VOCs are carbon-based chemicals that evaporate easily into the air at room temperature. In cleaning products they're the gases you smell off a spray, and indoor levels can run much higher than outdoors.
Certifications & Seals
EWG Verified, Safer Choice, Green Seal, Leaping Bunny — what each badge really promises.
- EPA Safer Choice Certification Safer Choice is a voluntary U.S. EPA program that certifies cleaning and other products whose every ingredient meets strict health and environmental safety criteria. The label means a government-backed program reviewed each ingredient, not just the finished product's marketing.
- EWG Rating / EWG Verified EWG (Environmental Working Group) is a U.S. nonprofit that rates products for ingredient hazard. Its databases score items 1-10 (Skin Deep) or A-F (Healthy Cleaning), while the separate EWG VERIFIED mark means a product met EWG's strictest ingredient and transparency standards.
- Green Seal Certification Green Seal is an independent nonprofit that certifies products against science-based sustainability standards. Its GS-37 standard for cleaning products means a cleaner met strict limits on harmful ingredients, VOCs and packaging while still cleaning effectively.
- Leaping Bunny Certification Leaping Bunny is a cruelty-free certification meaning a product and its ingredients were not newly tested on animals anywhere in the supply chain. Important: it certifies no animal testing, not that a product is safe, non-toxic or effective.
The whole point of learning the words
Once you can read a label, you stop trusting the front of the bottle and start trusting the back. That's exactly how we built Ecolosophy: one plant-based concentrate that makes 100+ spray bottles, every ingredient named, no artificial scents, no synthetic chemicals. Family-safe, pet-safe, planet-safe.
Shop the Pure Serenity Kit — $69 See every ingredient we use
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