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 22, 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
Unilever
Color Care Shampooing au sérum réparateur
Lists fragrance, fragrance allergens, sulfates, silicones, formaldehyde releasers, coconut derivatives
Color Charm Paints
Lists fragrance, fragrance allergens
Kenra Professional
Color Protecting Conditioner
Conditioner · Lists fragrance, fragrance allergens, drying alcohol, exfoliating acid, silicones, salicylic acid
Kenra Professional
Color Protecting Shampoo
Shampoo · Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, salicylic acid, coconut derivatives
Garnier
Color Shield Shampoo
Shampoo · Lists fragrance, fragrance allergens, exfoliating acid, sulfates, silicones, chemical UV filters, salicylic acid, coconut derivatives
L’Oréal
Colorista washout #bluehair
Lists drying alcohol, silicones
L’Oréal
Colorista Washout #turquoisehair
Lists drying alcohol, silicones
Sensodyne
Complete Protection +
Lists fragrance, sulfates, coconut derivatives
Every Man Jack
Conditioner
Conditioner · Lists fragrance, fragrance allergens, drying alcohol, exfoliating acid, coconut derivatives
PRAVANA
Conditioner
Conditioner · Lists fragrance, fragrance allergens, drying alcohol, silicones
Ogx
Conditioner Argan Oil of Morocco
Lists fragrance, drying alcohol, silicones
Nivea
Control de brillo
Lists fragrance, drying alcohol, chemical UV filters, coconut derivatives
Hawaiian Tropic
Cool aloe gel after sun
Lists fragrance, fragrance allergens
L’Oréal
Cool Power Gel Douche Cryo-Caps™ -4°C (Format XL)
Lists fragrance, fragrance allergens, drying alcohol, exfoliating acid, sulfates, salicylic acid, coconut derivatives
Dermalogica
Cooling Aqua Jelly
Moisturizer · Lists essential oils
Allies of Skin
Copper Tripeptide & Ectoin Advanced Repair Serum
Serum · Lists coconut derivatives
Cora
Cora : savon de Marseille
Lists fragrance, fragrance allergens, coconut derivatives
L’Oréal
Corps Lait hydratant Huiles merveilleuses Argan & Camélia
Lists fragrance, fragrance allergens, silicones
Cosmia
Cosmia - crème de nuit - 40 + anti rides au collageneer® - tous types de peaux - 50ml
Lists fragrance
Cosmia
Cosmia - gel douche et bain - instant mystérieux - 750ml
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Cosmia
Cosmia - gel douche et bain lait - à l’avoine - 750 ml
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Cosmia
Cosmia - lait de douche - à l’avoine - 250 ml
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Cosmia
Cosmia gel douche et bain lait hydratant a l’amande douce
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Cosmia
Cosmia gel douche et bain lait hydratant a la noix de coco
Lists fragrance, fragrance allergens, sulfates, coconut derivatives
Related guides
How to read an ingredient list
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.