Is Kirkland Laundry Detergent Toxic? The Truth About Costco’s Powerhouse
Is Kirkland laundry detergent toxic? Kirkland Signature Ultra Clean (Costco) is a high-performance detergent, but it ranks “High Hazard” (Grade D/F) on several safety databases. While its “Free & Clear” version is free of dyes and perfumes, both formulas contain ethoxylated surfactants (risk of trace 1,4-Dioxane) and synthetic preservatives like Methylisothiazolinone (MI), which are known skin irritants. For the average user, it is an effective, budget-friendly choice, but for those with extreme chemical sensitivities or newborns, it contains “Cautionary” synthetic chemicals.
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