Is Murphy Oil Soap toxic?
Low concern, one of the milder mainstream cleaners, with fragrance as the main flag and a couple of real use cautions.
Murphy Oil Soap is a potassium-vegetable-oil soap base with a chelator, propylene glycol, surfactants, and fragrance. EWG rates the Original Formula around C, better than most products on the shelf. It contains no oil left in the finished product and no phosphates. The cautions are practical: fragrance for sensitive users, and surface limits (not for unsealed wood, and easy on the water).
What's actually in it
The ingredients worth knowing about, and who flags them. Everything else in the bottle is doing an ordinary cleaning job.
Fragrance
Undisclosed scent blend, the main EWG flag and the usual sensitizer for reactive skin and airways.
Flagged by · EWG Murphy Oil Soap Original entry
Sodium EDTA
A chelator with environmental-persistence notes; low direct human-health concern at use levels.
Flagged by · EWG ingredient notes; manufacturer disclosure
Gentle, effective cleaning of finished wood, cabinets, and many sealed surfaces from a mostly plant-derived soap base. It scores better than most mainstream cleaners on EWG and skips phosphates and harsh solvents.
Is Murphy Oil Soap safe for…
Among the gentler floor and surface cleaners. Use it diluted, well-wrung, and let floors dry before crawl time.
Low concern at proper dilution on finished floors. Wipe up excess and let it dry before paws and grooming; rinse if you used it strong.
A mild choice for floors a dog walks on once dry. Keep the concentrate stored away, as with any soap, to prevent a dog drinking spilled product.
Lower-irritation than most, with fragrance the only real trigger. Ventilate if the scent bothers you.
Gentler than most cleaners thanks to the simple soap base. Gloves still help on prolonged contact, and fragrance is the sensitizer to watch.
Real wood, real oil soap, and the pet-paw question
Murphy Oil Soap leans on a vintage identity, and the chemistry mostly earns it: a potassium soap made from vegetable oil, no phosphates, and, despite the name, no free oil sitting in the finished bottle to leave a greasy film. That is why it cleans finished wood and cabinets without the harshness of a solvent spray, and why it lands a friendlier EWG grade than most of the shelf.
The pet-paw worry comes up because it is a 'floor soap,' and pets walk on floors then lick their feet. At label dilution on a sealed floor, mopped with a well-wrung mop so you are not leaving standing solution, the residue is a mild soap, not a hazard. The two cautions that matter are surface, not safety: it is for finished wood, so keep it off raw or unsealed wood that can absorb water and warp, and use it sparingly with a wrung-out mop, because excess water is what damages wood floors, not the soap. Let the floor dry before pets and crawlers return, and this is one of the lower-concern cleaners you can pick.
Better swaps
- A fragrance-free wood or floor soap for the most sensitive users
- Diluted castile soap on finished wood
- Havenly cleaning kit for a fragrance-free option across wood and general surfaces
We're affiliated with Havenly and recommend it where it genuinely fits. How that works.
- 01EWG Guide to Healthy Cleaning — Murphy Oil Soap Original Formula (rated C)
- 02Manufacturer disclosure — potassium vegetable-oil base, phosphate-free, no oil in finished product
- 03Manufacturer use guidance — dilution, finished wood only
This page reflects Newfase's opinion based on publicly available ingredient information and the cited sources, current as of publication. It is general information, not medical, veterinary, or legal advice, and is not affiliated with or endorsed by Murphy or its manufacturer. Product formulations change; always check the current label. See our methodology and ratings.
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