Kosas Chemistry Deodorant (Beachy Clean)
Low-Medium risk solid deodorant typical of the category without brand assurance.
This solid deodorant lacks water-resistant or nonstick coatings requiring PFAS. Brand provides no PFAS disclosure or third-party certifications.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Deodorant base (presumed mineral/plant oil)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Kosas Chemistry Deodorant (Beachy Clean) is made of, ingredients and materials
Kosas Chemistry is a solid stick deodorant based on plant oils, butters, and mineral powders rather than aluminum antiperspirant or synthetic polymer bases. The 'Beachy Clean' variant uses fragrance and essential oils to mask odor rather than blocking sweat. Solid deodorant formats inherently pose lower risk for volatile organic compound (VOC) off-gassing compared to sprays or liquid formulations, and the absence of aerosol propellants eliminates inhalation hazard pathways.
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.
Fragrance allergens and essential oils
Kosas Chemistry lists essential oils and fragrance components (beachy scent profile suggests citrus or marine notes). Lemongrass, coconut, and synthetic fragrance molecules can cause contact dermatitis or allergic sensitization in 1-3% of users; risk is low but not zero, especially with repeated daily application.
Bacterial or mold growth from oil degradation
Solid oil-based deodorants can develop bacterial or fungal growth if exposed to moisture or stored in humid bathrooms. This is a use/storage issue rather than a manufacturing defect, but users in tropical or high-humidity climates should replace more frequently or store in sealed containers.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Talc contamination in mineral powders
Kosas does not publicly disclose talc in this product, and mineral-based deodorants increasingly use rice starch or silica alternatives. No talc-related recalls or complaints are recorded for Kosas Chemistry deodorants; this hazard is unlikely but dependent on supplier transparency.
Heavy metals
Plant-oil deodorants typically contain iron oxides or mica for texture and color. No heavy-metal contamination (lead, cadmium, arsenic) has been reported in Kosas products or in this category generally, but sourcing of natural minerals is not always disclosed.
Source, FDA ↗Formaldehyde / VOCs
Kosas does not list controversial formaldehyde-releasing preservatives (DMDM hydantoin, imidazolidinyl urea) on its published ingredients. Solid anhydrous formulations require fewer preservatives than creams; risk is not established for this product.
Source, ATSDR ↗How is this PFAS grade calculated?
The brand's record and disclosure
Kosas is owned by Estee Lauder and markets itself as a clean-beauty brand with published ingredient lists and no fragrance masking on its website. The brand does not publish independent third-party certifications (e.g., EWG Verified, Clean at Sephora) for this product, though it claims no sulfates, parabens, or phthalates. No product recalls or safety controversies are on public record for Kosas deodorants. Brand silence on PFAS testing is typical for indie beauty but limits independent verification of water-resistance claims.
How it compares in its category
Solid plant-oil deodorants occupy the lower-risk tier of the category; they avoid both aluminum chlorohydrate and talc-related concerns common in conventional brands. Compared to natural alternatives (e.g., Schmidt's, Native), Kosas' Estee Lauder backing provides supply-chain oversight, though it does not guarantee additional safety testing. Fragrance-based odor masking presents lower concern than antimicrobial agents (triclosan, parabens) historically linked to endocrine disruption, now largely phased out.
If you buy it
Store in a cool, dry place away from heat and direct sunlight to prevent separation of oils and butters. Replace every 6-12 months depending on frequency of use; solid deodorants do not degrade rapidly but can develop mold if exposed to water. Patch-test on inner arm first if you have sensitive skin, as essential oils (lemongrass, coconut) can trigger contact dermatitis in susceptible users. If irritation develops, discontinue and rinse skin; fragrance allergen reactions are the primary user-safety concern with this product type.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Kosas has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Kosas Chemistry Deodorant (Beachy Clean)?
- mineral-based powder blend (arrowroot, magnesium hydroxide, mica)
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- Skin irritation from magnesium hydroxide alkalinity
- cosmetic formulations, primary ingredients listed
- A third party reports verifying it as PFAS-free
- Fragrance allergens (natural essential oils)
2 hazards checked on this product, all on its full breakdown.
- natural mineral powders, plant-based actives, beeswax
- We found no PFAS statement from the brand
- Beeswax purity and contamination
2 hazards checked on this product, all on its full breakdown.
More deodorant 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.