Sodium Hydroxide is considered Safe across all safety dimensions evaluated
No safety flags identified across 20+ dimensions. Evidence tier: Silver
1,595 validated ingredients. 20+ safety dimensions. Published methodology with DOIs.
Last updated April 2026.
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Sodium Hydroxide
Skincare (pH Adjuster) · Silver
Safe
CategorySkincare (pH Adjuster)
Evidence tierSilver
Safe at cosmetic concentrations (pH buffer).
Breastfeeding
Used in tiny amounts to adjust pH of cosmetic formulations. Fully neutralized in final product. Not present as free lye.
Pregnancy
Safe at cosmetic levels.
Frequently Asked
Is Sodium Hydroxide safe while breastfeeding?+
Sodium Hydroxide is classified as Safe for breastfeeding in the Clarity database. Safe at cosmetic concentrations (pH buffer).
No safety flags identified. Clarity evaluated Sodium Hydroxide across 20+ safety dimensions including breastfeeding, histamine, MCAS, rosacea, allergens, and more. No concerns were identified based on current evidence. Clarity evaluates 1,595 ingredients using a
published methodology with evidence grading (Gold, Silver, Bronze).
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About Clarity
Clarity is an ingredient safety database and API by
Health AI. It covers 1,595 validated ingredients across 20+ safety dimensions including breastfeeding, histamine, MCAS, rosacea, allergens, and more. Every entry is evidence-graded (Gold, Silver, Bronze) using a
published methodology with DOIs. Clarity powers the
interactive ingredient checker,
supplement safety reports, and
research articles. Health AI is a healthcare AI governance platform and evidence layer.