What are the ingredients of the Loo Cleaner Tabs?Updated 6 hours ago
TL;DR: Loo Cleaner Tabs list 14 ingredients on the box, plus the water-soluble PVA wrapper each tab comes in. Bicarb soda, two descalers, a surfactant, oxygen bleach, two enzymes, a soil dispersant and the bits that hold the tablet together. No chlorine bleach, no added fragrance, no phosphates, no synthetic dyes. Sensitive Choice approved and Good Environmental Choice Australia (GECA) certified. Tap any ingredient below to see what it does.
What is not in Loo Cleaner Tabs?
✓ What is not in there
Loo Cleaner Tabs are a dry tablet with no solvent and no added fragrance, so there is nothing in them that evaporates off as a volatile organic compound (VOC). They are designed to clean the bowl, lift mineral staining, and rinse away with the water.
What is in Loo Cleaner Tabs?
✓ What is in there
- ✓ Descalers (citric acid, DL-tartaric acid)
- ✓ Bicarb soda (sodium bicarbonate)
- ✓ Washing soda (sodium carbonate)
- ✓ A surfactant (sodium lauryl sulfate)
- ✓ Oxygen bleach (sodium percarbonate)
- ✓ Two enzymes (lipase, protease)
- ✓ A soil dispersant (trisodium dicarboxymethyl alaninate)
- ✓ Tablet binders, a filler, a disintegrant and a processing aid
- ✓ A water-soluble PVA wrapper
That is 14 ingredients on the list, plus the wrapper.
✓ The full list, as printed on the box
Citric Acid, DL-Tartaric Acid, Sodium Bicarbonate, Sodium Carbonate, Sodium Lauryl Sulfate, Sodium Percarbonate, Polyethylene Glycol (PEG-4000), Polyvinylpyrrolidone (Crospovidone), Croscarmellose Sodium, Microcrystalline Cellulose, Magnesium Stearate, Trisodium Dicarboxymethyl Alaninate, Lipase, Protease.
The box also carries the certification marks. Formulations get reviewed from time to time, so the product page carries the current batch detail.
Citric Acid
A descaler. Dissolves limescale and the mineral marks that build up around the water line.
DL-Tartaric Acid
A descaler. Helps shift limescale and soap scum.
Sodium Bicarbonate
Bicarb soda. A mild abrasive that lifts marks off the bowl, and a deodoriser.
Sodium Carbonate
Washing soda. An alkaline cleaning agent that helps shift grease and mineral deposits.
Sodium Lauryl Sulfate
A surfactant. Lifts grease and soil off the bowl surface so it rinses away.
Sodium Percarbonate
An oxygen bleach. Releases hydrogen peroxide in water to lift stains and cut odours.
Polyethylene Glycol (PEG-4000)
Tablet binder.
Polyvinylpyrrolidone (Crospovidone)
Tablet binder.
Croscarmellose Sodium
Tablet disintegrant.
Microcrystalline Cellulose
Tablet filler.
Magnesium Stearate
Tablet processing aid.
Trisodium Dicarboxymethyl Alaninate
A soil dispersant. Keeps loosened grime suspended so it flushes away instead of settling back on the bowl.
Lipase
An enzyme. Targets fatty and oily residues.
Protease
An enzyme. Targets protein-based residues such as urine and organic waste.
PVA wrapper film
A cold water-soluble film, the same technology used in dishwasher and laundry pods. It is the wrapper each tab comes in, and it dissolves with the tab, so there is nothing to peel off. More on the PVA wrapper and the environment
What do these ingredients mean for septic and greywater systems?
✓ Why the absence list matters here
Septic compatible when used as directed, and the ingredient list is the reason. No chlorine bleach and no quaternary ammonium disinfectant, which are the two things that knock over the bacteria a septic tank or an aerated wastewater treatment system depends on. No phosphates either.
Use only as directed. One tab per toilet, dropped straight into the bowl.
Never pour undiluted product into a septic tank, greywater line or inspection opening.
Avoid excessive use beyond normal cleaning. More product does not clean better and it loads the system.
⚠ If you reuse treated water on the garden, three things change the answer
Greywater reuse is not only about the product. It depends on your soil type, since clay and sandy soils handle irrigation water differently. It depends on what you are watering, because edible crops carry stricter rules than ornamentals. And it depends on your local council, since requirements vary by state and council area. Check your local guidelines, and treat your system manufacturer's approved-product list as the final word.
Where can I find the Safety Data Sheet?
Loo Cleaner Tabs Safety Data Sheet (SDS)
Heads up before you tap. The Safety Data Sheet is a regulatory document written for workplace safety officers, first responders and waste handlers. It uses chemistry and hazard classification language and it is not designed as a customer FAQ.
If you are asking about ingredients, sensitivity or everyday use, the breakdown above and the product page will get you there faster.
Still need it? It is a standardised 16-section PDF covering hazards, first aid measures, handling and storage, and disposal.
Download SDS (PDF)
14 ingredients on the box. No chlorine bleach, no added fragrance, no phosphates. Sensitive Choice approved, GECA certified.
The scrub tool that pairs with Loo Cleaner Tabs. TPE blade, with a handmade ceramic pot for storage.
Koh Perks · earn points on every order
Earn points on every purchase, refer a friend, and redeem for discounts on your next order.
Browse all Loo Cleaner Tabs articles
Last reviewed: September 2026 · Koh Australia