Sodium Hydroxide
Sodium Hydroxide is a buffering and denaturant ingredient. It’s in 2,058 products on Poliage, most often body lotion, moisturizer and body wash. Avoid lists on Poliage that include it: none.
Updated October 21, 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
Deliplus
Gel de baño frescor azul
Lists fragrance, fragrance allergens, sulfates
L’Oréal
Gel de Limpeza Anti-idade Lóreal Revitalift Hialurônico
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, salicylic acid, coconut derivatives
Neutrogena
Gel de Limpeza Facial Neutrogena Hydro Boost
Lists fragrance, silicones, coconut derivatives
Nivea
Gel de Limpeza Facial Nivea Controle do Brilho
Lists fragrance, fragrance allergens, sulfates, chemical UV filters, coconut derivatives
nivea
gel de limpeza refrescante
Lists fragrance allergens, sulfates, parabens, chemical UV filters, coconut derivatives
Yves Rocher
Gel désincrustant visage
Lists fragrance, drying alcohol, sulfates, silicones, coconut derivatives
Rituals
Gel douche 2-en-1 corps et cheveux
Lists fragrance, fragrance allergens, essential oils, sulfates
Cosmia
Gel douche a l’eau de coco
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
PALMOLIVE
GEL DOUCHE CREME
Lists fragrance, fragrance allergens, exfoliating acid, sulfates, salicylic acid, coconut derivatives
Roger & Gallet
Gel douche délassant à l’extrait de bourgeons de figuier & aloe vera
Lists fragrance, fragrance allergens, drying alcohol, sulfates, coconut derivatives
Cosmia
GEL DOUCHE ET BAIN A LA MÛRE SAUVAGE et A LA GRENADE
Lists fragrance, sulfates, coconut derivatives
Cosmia
Gel douche et bain Cerise et Jasmin
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Cosmia
Gel douche et bain INSTANT VOLUPTUEUX
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Cosmia
Gel douche et bain lait hydratant à la fleur de coton
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Auchan
Gel douche et bain Olive
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Auchan
Gel douche extra-doux lait coco hydratant
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Cosmia
Gel douche gommant au savon noir et éclats d’argan
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Cosmia
Gel Douche Gommant Aux Noyaux D´abricot
Lists fragrance, sulfates, coconut derivatives
Colgate-Palmolive
Gel douche gommant doux
Lists fragrance, fragrance allergens, sulfates, salicylic acid, coconut derivatives
Cosmia
Gel douche gourmand à la guimauve
Lists fragrance, sulfates, coconut derivatives
Cosmia
Gel douche gourmand au tendre caramel
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Cora
Gel douche Hammam parfum argan
Lists fragrance, sulfates, coconut derivatives
Cosmia
GEL DOUCHE MÛRE SAUVAGE et GRENADE
Lists fragrance, sulfates, coconut derivatives
Cien
Gel douche nourrisant à l’extrait d’argan et à l’eau de fleur d’oranger
Lists fragrance, fragrance allergens, coconut derivatives
Related guides
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What the ingredient list on a beauty product tells you, what the names mean, and what it leaves out, using FDA and EU labeling rules.
Does ingredient order show how much is in a product?
Ingredient lists run from most to least, but only down to 1%. Below that, any order is allowed. What the order shows and what it hides.
How do you patch test a new product?
What the AAD, FDA and DermNet say about testing a small area, the FDA hair dye skin test, in-office patch tests, and contact allergy basics.