Corpus Christi · Deodorant
Crystal Deodorant Stick
Lower-concern product; mineral crystal deodorants typically do not require PFAS treatments, but brand transparency is absent.
Crystal deodorants like this one are made from mineral salts (alum compounds) that naturally lack PFAS and do not require water-resistant or stain-resistant coatings. Corpus Christi makes no public PFAS claims or disclosures. No independent testing data is publicly available to confirm or rule out contamination.
Shop Corpus Christi on Amazon →Material
mineral-based crystal (likely ammonium alum or potassium alum)
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
cosmetics is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Crystal Deodorant Stick products are typically composed of ammonium alum or potassium alum, naturally occurring mineral salts that work by creating an inhospitable environment for odor-causing bacteria rather than blocking sweat. The crystal form is insoluble at skin pH, meaning it sits on skin as a physical barrier rather than absorbing into tissue. This material class has been used for centuries and carries a substantially different risk profile than synthetic antiperspirant actives like aluminum chlorohydrate.
The brand's record and disclosure
Corpus Christi has not published detailed ingredient transparency, safety certifications, or third-party testing results in publicly available sources. No known recalls, adverse event reports, or controversy regarding this specific product exist on record. The brand's silence on PFAS is neither unusual nor alarming for a mineral-based deodorant, since the product category itself does not typically require PFAS-based manufacturing aids or water-repellent coatings.
How it compares in its category
Mineral alum deodorants occupy a lower-hazard category than conventional aluminum antiperspirants (which use more easily absorbed aluminum compounds) and synthetic spray deodorants (which may contain propellants and fragrance allergens). Crystal sticks are comparable in safety profile to other mineral alum brands like Tom's of Maine Crystal or Weleda, though transparency varies by brand. The main tradeoff is efficacy: mineral crystals are generally weaker at odor control than synthetic alternatives.
If you buy it
Apply to dry skin after bathing for best adherence; the crystal will leave visible residue that brushes off. Replace the stick when worn down or visibly cracked, typically every 6-12 months depending on use frequency. Store in a dry location to prevent the alum crystal from dissolving prematurely. Discontinue use if skin irritation develops, though sensitization is rare with mineral alum.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Heavy metals in mineral salts (cadmium, lead)
Alum ore deposits can contain trace heavy metals depending on mining location and purification. No specific testing results for Corpus Christi product are publicly available; standard mineral alum deodorants from major manufacturers typically test below FDA limits, but verification is brand-dependent.
Skin irritation from alum contact
Ammonium and potassium alum are astringent compounds that can cause mild irritation, stinging, or drying in sensitive individuals or if applied to freshly shaved or broken skin. Incidence is low but not zero; discontinuation resolves symptoms.
Contamination from handling or storage
Crystal deodorants are solid mineral forms and do not support bacterial or mold growth under normal storage conditions. Risk is primarily environmental if the stick is stored in high-humidity settings or shared among multiple users without cleaning.
Fragrance allergens (if scented variant)
If the Corpus Christi product is unscented or scent-free, fragrance hazard is absent. If scented, typical synthetic fragrance allergens (limonene, linalool) may be present, but ingredient disclosure would be needed to assess.
Aluminum systemic absorption
Mineral alum crystals are insoluble at skin pH and do not penetrate skin significantly, unlike antiperspirant salts designed for absorption. No credible evidence links topical alum crystal deodorant use to systemic aluminum accumulation.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Deodorant
Tom's of Maine
Deodorant
mineral-based, baking soda formulation
Lower concern, mineral-based formula with public PFAS-free positioning, though no independent third-party verification.
⚠Risky category by default
Tom's of Maine
Most-Loved Deodorant Bundle
mineral-based and plant-derived actives; stick formulation
Lower-concern deodorant; mineral-based formula with PFAS-free claim aligns with brand ethos, but no third-party verification found.
⚠Risky category by default
Tom's of Maine
Antiperspirant Deodorant
mineral-based active ingredients, plant-derived botanicals, no synthetic water-repellent coatings
Lower PFAS concern, mineral-based formula with MADE SAFE cert; antiperspirant category has minimal waterproof-coating risk.
✓Verified PFAS-free by a third party
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.