Sodium Hydroxide
Sodium Hydroxide is a buffering and denaturant ingredient. It’s in 2,161 products on Poliage, most often body lotion, moisturizer and body wash. Avoid lists on Poliage that include it: none.
Updated October 25, 2026
In plain English
Lye. Used in small amounts to adjust pH, or to turn fats into soap.
What it does
Contains Sodium Hydroxide: buffering
Function listed in CosIng
Contains Sodium Hydroxide: denaturant
Function listed in CosIng
Source: CosIng, the European Commission cosmetic ingredient database, ref 37890, accessed October 22, 2026. Also listed as natrii hydroxidum.
Products that contain Sodium Hydroxide
The Ordinary
Multi-Peptide + Copper Peptides 1% Serum
Serum · None of Poliage’s flag groups listed
The Ordinary
Multi-Peptide + HA Serum
Serum · None of Poliage’s flag groups listed
Naturium
Multi-Peptide Advanced Serum
Serum · 1.0 fl oz · Lists silicones
Naturium
Multi-Peptide Eye Cream
Eye cream · None of Poliage’s flag groups listed
Naturium
Multi-Peptide Moisturizer
Moisturizer · 1.7 oz · Lists silicones
Curlsmith
Multi-Tasking Conditioner
Conditioner · 8 oz · Lists fragrance, fragrance allergens, drying alcohol, essential oils
Dermalogica
Multivitamin Power Recovery Cream
Moisturizer · Lists fragrance allergens, exfoliating acid, retinoid, essential oils
Love Beauty and Planet
Murumuru butter & rose blooming colour conditioner
400 mL · Label from Indonesia and Malaysia · Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Treacle moon
My coconut island
225 ml · Label from France · Lists fragrance, fragrance allergens
Nair
Nair NourishShower Power
13 Oz. (368g) · None of Poliage’s flag groups listed
Nair
Nair Sensitive Hair Removal Cream
200 ml · Label from Brazil · Lists fragrance, fragrance allergens, sulfates, parabens, silicones
Henkel
Natural & Easy 545 blond cendré
60ml · Label from outside the U.S. · Lists fragrance, fragrance allergens, sulfates, coconut derivatives
The Ordinary
Natural Moisturizing Factors + Beta Glucan
Moisturizer · None of Poliage’s flag groups listed
The Ordinary
Natural Moisturizing Factors + HA
None of Poliage’s flag groups listed
Mitchum
Natural Power Gel Cream
Ingredients incomplete, can’t check
Naturopathica
Natural Salicylic Acid Cleanser
Cleanser · Lists exfoliating acid, essential oils, salicylic acid, coconut derivatives
L’Occitane
Nectar de Massage
250 mL · Label from France · Lists fragrance, parabens
L’occitane
Néroli & Orchidée - Crème Mains - 30 ML - L’occitane En Provence
Label from France · Ingredients incomplete, can’t check
Nivea
Nettoyant visage solide - Naturally Clean
75 g · Label from outside the U.S. · Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Dermalogica
Neurotouch Symmetry Serum
Serum · Lists fragrance, fragrance allergens, essential oils, coconut derivatives
L’Oréal
Neutralia Dermo-Protecteur Shampooing Traitant Anti-Pelliculaire
300 ml · Label from France · Lists fragrance, exfoliating acid, sulfates, salicylic acid, coconut derivatives
L’Oréal
Neutralia shampooing équilibre
300 ml · Label from France · Lists fragrance, exfoliating acid, sulfates, salicylic acid, coconut derivatives
Neutrogena
Neutrogena Gesichtspflege
200 ml · Label from Germany · Ingredients incomplete, can’t check
Neutrogena
Neutrogena Hydro Boost Aqua Gel Dagcrème
50ml - Alle huidtypen · Label from Netherlands · Lists fragrance, silicones
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