Is Simple Green All-Purpose Cleaner toxic?
Low to moderate concern in the current formula, and the dilution you use decides which.
The current Simple Green All-Purpose formula is an ethoxylated-alcohol surfactant, a chelator, a touch of acid for pH, fragrance, and isothiazolinone preservatives. The notorious 2-butoxyethanol was removed years ago. Two honest flags remain: methylisothiazolinone/methylchloroisothiazolinone preservatives (known skin sensitizers) and the fact that label dilution matters, since full strength is far harsher than the diluted spray most people should use.
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.
Methylisothiazolinone / methylchloroisothiazolinone
Preservatives and well-documented contact allergens. The main skin-sensitization concern in the current formula.
Flagged by · Simple Green All-Purpose Cleaner current SDS (version 13000-24A)
C9-11 alcohols ethoxylated
The main surfactant. Eye and skin irritant at concentration; ethoxylated process can carry trace 1,4-dioxane.
Flagged by · Simple Green current SDS
Fragrance
Proprietary scent blend; potential sensitizer, present at low percentage.
Flagged by · Simple Green current SDS lists fragrance under 1 percent, anethole, eucalyptol
It is a capable, affordable degreaser that, diluted, handles a wide range of household and garage jobs without the old glycol-ether solvent. Reformulating out 2-butoxyethanol was a real improvement, and the brand publishes dilution ratios for different tasks.
Is Simple Green All-Purpose Cleaner safe for…
Dilute heavily, rinse food-contact surfaces. The preservatives and surfactant are the flags; diluted and rinsed it is low concern.
Rinse treated surfaces. Diluted use is low concern; avoid letting cats contact full-strength residue.
Low concern diluted and rinsed. Store the concentrate out of reach.
Low concern diluted; avoid spraying full strength in a closed room where surfactant mist and fragrance can irritate airways.
Moderate concern. The isothiazolinone preservatives are notable skin sensitizers. Wear gloves and use the diluted strength.
It is not the cleaner it was, for better and with one new flag
Simple Green earned its bad reputation honestly, around 2-butoxyethanol, a glycol-ether solvent that drew fire from environmental and safety reviewers. The brand reformulated and removed it years ago, so criticism aimed at that ingredient is now out of date. Credit where due.
The current SDS shows what replaced it: an ethoxylated-alcohol surfactant, a biodegradable chelator, a little acid for pH, fragrance, and isothiazolinone preservatives. That last group is the new thing to watch. Methylisothiazolinone and methylchloroisothiazolinone are effective preservatives and among the more common causes of contact allergy in cleaning products, enough that dermatology groups have flagged the class. For most people, diluted and rinsed, none of this registers. For eczema-prone or fragrance-reactive users, gloves and the weakest effective dilution are the move, and a preservative-light alternative is worth considering.
Concentrate is not a ready-to-use spray
A lot of Simple Green complaints come from using it wrong. It is a concentrate, and full strength is a different product from the diluted spray most jobs need. The label gives ratios for a reason: roughly full strength to 1:1 for heavy degreasing, up to 1:10 general purpose, up to 1:30 for light cleaning.
Used at 1:30 on a counter it is a mild cleaner. Used neat on the same counter it is a strong surfactant solution that can irritate skin and eyes and strip finishes. The hazard scales with concentration, so the honest safety advice is boring and effective: mix to the lightest ratio that does the job, keep the concentrate capped and stored away from kids and pets, and rinse any food-contact surface afterward.
Better swaps
- The same product diluted to the lightest effective ratio
- A preservative-light, fragrance-free all-purpose cleaner for sensitive skin
- Havenly cleaning kit for everyday surfaces without isothiazolinone preservatives
We're affiliated with Havenly and recommend it where it genuinely fits. How that works.
- 01Simple Green All-Purpose Cleaner current Safety Data Sheet (version 13000-24A) — ethoxylated alcohol, tetrasodium glutamate diacetate, fragrance, methyl(chloro)isothiazolinone; 2-butoxyethanol no longer listed
- 02Manufacturer dilution guidance — full strength to 1:30 depending on task
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 Simple or its manufacturer. Product formulations change; always check the current label. See our methodology and ratings.
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