Used to adjust pH; the ingredient in the formula, at final product pH the NaOH is neutralised; final product pH must be skin-safe (3.5-7 depending on category); the residual in formula is sodium salt of the acid being neutralised, no residual NaOH in properly formulated product
Function & Common Use
pH Adjuster
pH Adjuster
All cosmetics pH adjustment
Mineral
Concentration Limits
No formal limit
No limit (adjust to safe pH)
No specific 21 CFR cosmetic limit identified in source checked; EU limit reference: No limit (adjust to safe pH)
No specific MFDS limit identified in source checked; verify if ingredient is used in a Korean functional cosmetic category
Pregnancy: No specific restriction identified in source checked; standard cosmetic use
Frequently Asked Questions
Is Sodium Hydroxide safe to use in skincare?
Sodium Hydroxide has a High concern rating. Used to adjust pH; the ingredient in the formula, at final product pH the NaOH is neutralised; final product pH must be skin-safe (3.5-7 depending on category); the residual in formula is sodium salt of the acid being neutralised, no residual NaOH in properly formulated product
Is Sodium Hydroxide allowed in India?
Sodium Hydroxide is currently classified as "Permitted" under Indian cosmetics regulations. The maximum permitted concentration is No formal limit.
What is Sodium Hydroxide used for in cosmetics?
Sodium Hydroxide functions as: pH Adjuster. It is commonly found in: All cosmetics pH adjustment.
Regulatory Status
Identifiers
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