Fels-Naptha · Fabric Stain Guard Sprays
Fels Naptha Laundry Soap & Stain Remover Bar
Lower PFAS concern. Traditional soap bar without known treatment risks.
Fels-Naptha is traditional vegetable and animal oil soap without water-repellent or stain-resistant treatments requiring PFAS. Inherent composition poses lower concern.
We flunk more products than we pass. This one earned its grade. How we grade
Material
soap bar, vegetable and animal oils
Lab data
No public lab test
What Fels Naptha Laundry Soap & Stain Remover is made of, ingredients and materials
Fels-Naptha is a bar soap formulated from saponified vegetable and animal oils, plus sodium carbonate and sodium silicate as builders and optical brighteners. This is a detergent base without synthetic surfactants or polymer coatings that could shed microplastics or leave problematic residues on fabric. The bar format means no plastic packaging waste at the point of use, though the product historically came wrapped in paper or cardboard, reducing microplastic risk from liquid soap containers.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Heavy metals
Optical brighteners (likely fluorescent compounds used to enhance whiteness on fabric) are present but not specified by metal content; independent testing of accumulated residue on fabric has not been published for this product, so risk remains at the level of possible but unverified.
Source, FDA ↗What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Formaldehyde / VOCs
Fels-Naptha does not list formaldehyde-releasing preservatives (such as diazolidinyl urea or imidazolidinyl urea) in its known ingredient profile; traditional soap bars rely on their alkaline pH to inhibit microbial growth.
Source, ATSDR ↗Azo dyes or synthetic colorants
The product is formulated as an off-white or tan bar without artificial dyes; no azo dye concerns have been reported in public records for this brand or formulation.
Fragrance allergens
Fels-Naptha is unscented or very lightly scented with minimal fragrance compounds; fragrance-related dermatitis is not a known issue for this product.
Microplastic shedding from coating or formulation
As a solid soap bar composed of saponified oils and minerals, Fels-Naptha does not contain polymers, microbeads, or synthetic coatings that would fragment or shed into laundry water.
The full breakdown
The brand's record and disclosure
Fels-Naptha (owned by Clorox) has not published detailed ingredient safety disclosures or third-party certifications such as EPA Safer Choice or Ecocert. The brand does not explicitly address PFAS in its communications, though traditional soap bars are not treated with water- or grease-repellent coatings that would require PFAS additives. No recalls or safety controversies specific to residue on fabric or skin sensitization have been established in public records for this product.
How it compares in its category
Fels-Naptha is one of the oldest bar stain removers on the market and remains simpler in formulation than modern enzyme-based liquid pre-treaters or spray stain guards, which often contain surfactant blends, optical brighteners, and preservatives. Compared to spray stain guards, a bar soap has no propellant, no water base requiring preservatives like methylisothiazolinone, and no risk of aerosolized residue. Its lack of fragrance or dyes also reduces exposure to allergens and heavy-metal pigments common in scented alternatives.
If you buy it
Wet the stain, rub the bar directly or dissolve shavings in water, then launder in hot or warm water; cold water reduces effectiveness. Do not apply to delicate fabrics without testing on a hidden area first, as the alkaline base and friction can weaken some fibers. Store the bar in a dry place between uses to prevent mold or bacterial growth in soap residue. Replace when noticeably smaller or when it no longer lathers effectively, typically after many months of use.
What we don’t know
- Basis
- Model estimate, 92% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Fels-Naptha has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
More fabric stain guard sprays grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.