active
Zinc Ricinoleate
A zinc-based deodorant active derived from castor oil ricinoleic acid. Used in natural deodorant and odour-neutralising cosmetics as an odour-trapping active rather than an antiperspirant.
Benefits
- Traps and neutralises volatile odour compounds
- Non-antiperspirant deodorant mechanism — does not block sweat glands
- Compatible with natural deodorant formulations
- Stable in anhydrous and low-water systems
- Derived from castor oil — plant origin
Example uses
- Natural deodorants
- Odour-neutralising body creams
- Clean deodorant sticks
- Body washes with odour control
- Brightening serums with odour management
Mechanism of action
Zinc ricinoleate acts as an odour-absorption matrix: the polar ricinoleate group binds and immobilises volatile odour compounds (primarily C4–C8 fatty acids, ammonia, and reduced sulfur compounds from bacterial metabolism) via coordination with the zinc ion and hydrophobic interaction with the ricinoleate chain. This reduces the vapour pressure of odour molecules, decreasing perceived malodour without inhibiting sweat gland function.
Clinical evidence · Moderate
Mechanism well-characterised in odour absorption studies. Clinical deodorant efficacy studies exist but methodologically varied.
Effective concentration range
1–5% in deodorant formulations
Formulation notes
Functions in anhydrous or low-water systems. Effective in combination with zinc-based antimicrobials and botanical deodorant actives. pH neutral to mildly alkaline for optimal function.
Watchouts
Not an antiperspirant — does not reduce sweating. Efficacy against heavy odour may be insufficient as standalone active without antimicrobial pairing. Efficacy highly subjective between individuals.
Stacks with
Controversies & overclaims
Natural deodorant efficacy claims are frequently overstated. Zinc ricinoleate provides meaningful odour trapping; its effectiveness as a standalone deodorant active in heavy sweating is not equivalent to aluminium-based antiperspirants.
Market positioning
Marketed as effective natural deodorant active. The odour-trapping mechanism is real; the efficacy gap versus aluminium-based products for heavy sweating is underreported.
Comedogenicity
0 / 5
Sensitisation risk
Low
INCI & aliases
Zinc Ricinoleate
zinc 12-hydroxyoctadec-9-enoate · castor oil zinc soap
Clean beauty perception
Strongly accepted in clean beauty as a natural deodorant active. Plant-derived, castor-oil source, no aluminium-based antiperspirant concerns.
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