Seventh Generation products are generally safer than conventional cleaning brands, but they aren’t completely free of concerning chemicals. The brand avoids many of the worst offenders in household cleaning, like chlorine bleach, phosphates, and synthetic fragrances in its “Free & Clear” line. However, some products contain preservatives and trace contaminants that complicate the “non-toxic” label.
What’s Actually in the Products
Seventh Generation uses plant-based surfactants (the ingredients that do the actual cleaning) rather than petroleum-derived ones common in mainstream brands. The company publicly discloses its ingredient lists, which puts it ahead of many competitors that hide behind vague terms like “cleaning agents” or “fragrance.” The brand also conducts periodic testing for a range of potentially harmful trace materials including 1,4-dioxane, phthalates, metals, chlorine, formaldehyde, and pesticides.
That transparency has revealed some uncomfortable findings. Internal testing detected small amounts of DEHP, a reproductive toxicant and common plasticizer, in the undiluted essential oil blends used in scented products. The contamination came from PVC plastic tubing used during processing, not from an intentional ingredient choice. The company’s suppliers have been working to reduce this, but it illustrates an important point: even brands trying to be clean can have contamination in their supply chains.
The Preservative Problem
Several Seventh Generation products contain methylisothiazolinone (MIT), a preservative that prevents bacterial growth in liquid cleaning products. The Environmental Working Group flags MIT as a skin sensitizer, meaning it can trigger allergic reactions, particularly with repeated exposure. Products known to contain it include the All Purpose Cleaner (Free & Clear), the Professional All-Purpose Cleaner, and the Ultra Power Plus Dish Liquid in Fresh Citrus Scent.
Seventh Generation acknowledges this directly on its website, noting that while its hypoallergenic products pass clinical testing for skin irritation and sensitization, “a small percentage of individuals may have some form of allergic reaction or irritation to MIT, BIT, or OIT.” If you have sensitive skin or contact allergies, this is worth paying attention to. The preservative is more of a concern in products that stay on your skin (like dish soap used for hand washing) than in laundry detergent that rinses away.
EWG Safety Scores Vary Widely
The Environmental Working Group rates cleaning products on an A-through-F scale based on ingredient safety, and Seventh Generation’s scores are all over the map. Dishwashing pods score well, earning A to B ratings. Laundry pods land between A and C. But general-purpose laundry detergent spans the full range from A to F, meaning some formulations in that category contain ingredients EWG considers problematic. Hand washing detergent scores between C and D, which is mediocre.
This spread tells you something important: not all Seventh Generation products are equal. The “Free & Clear” versions, which skip fragrances and dyes, consistently score better than scented versions. If your goal is to minimize chemical exposure, stick with the unscented line and check the EWG rating for the specific product you’re buying rather than assuming the brand name alone guarantees safety.
The 1,4-Dioxane Question
One contaminant worth understanding is 1,4-dioxane, a probable carcinogen that isn’t added to cleaning products on purpose. It forms as a byproduct when certain plant-based surfactants are manufactured. California’s Department of Toxic Substances Control has found it in a wide range of cleaning products across the industry, with laundry detergents averaging around 4.6 ppm in independent lab testing and some products reaching as high as 132 ppm. California intends to set a threshold of 1 ppm for products containing this chemical.
Seventh Generation tests for 1,4-dioxane as part of its regular quality checks, which most conventional brands don’t do. The company uses a process called vacuum stripping to reduce levels of this contaminant. Still, any product made with ethoxylated surfactants (which includes most liquid cleaning products, even plant-based ones) carries some risk of trace 1,4-dioxane. The concentrations are small, and exposure from a single product is minimal, but it’s a reason the “non-toxic” label doesn’t hold up in an absolute sense.
How It Compares to Conventional Brands
Compared to mainstream products from major manufacturers, Seventh Generation eliminates several categories of chemicals that raise health concerns. You won’t find optical brighteners (synthetic chemicals left on fabric to make clothes appear whiter), chlorine bleach, or synthetic dyes. The scented versions use essential oils and botanical extracts rather than the undisclosed synthetic fragrance blends common in products from larger companies, where “fragrance” on a label can represent dozens of hidden chemicals.
That said, Seventh Generation is now owned by Unilever, which acquired the brand in 2016. The formulations haven’t fundamentally changed, but it’s worth noting the corporate context. The brand operates with more ingredient transparency than its parent company’s other cleaning lines, maintaining its own standards for ingredient selection and testing.
What “Non-Toxic” Actually Means
There’s no regulated definition of “non-toxic” for household cleaning products in the United States. The term has no legal standard, so any brand can use it. Seventh Generation doesn’t heavily market itself as “non-toxic” but instead emphasizes plant-based formulations and ingredient transparency.
A more useful way to think about it: Seventh Generation products pose lower risk than most conventional alternatives, but they aren’t inert. They contain preservatives that can irritate sensitive skin, trace contaminants that are difficult to eliminate entirely from plant-based surfactant manufacturing, and, in scented versions, essential oil blends that may carry low-level contamination from processing equipment. For most people using these products as directed, the exposure levels are very low. But if you’re looking for a product with zero concerning ingredients, no brand of liquid cleaning product truly meets that bar. The closest you’ll get within Seventh Generation’s lineup is the Free & Clear line, and even that comes with the caveats above.