Sodium Hydroxide
Sodium Hydroxide is a buffering and denaturant ingredient. It’s in 2,160 products on Poliage, most often body lotion, moisturizer and body wash. Avoid lists on Poliage that include it: none.
Updated October 26, 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
Andalou Naturals
Resurfacing Triple Acid Exfoliating Toner
Toner · Lists fragrance, fragrance allergens, exfoliating acid, essential oils, coconut derivatives
Allies of Skin
Retinal & Peptides Repair Night Cream
Moisturizer · Lists exfoliating acid, retinoid, salicylic acid
The Ordinary
Retinal 0.2% Emulsion
Moisturizer · Lists exfoliating acid, retinoid, coconut derivatives
Naturium
Retinaldehyde Cream Serum 0.05%
Serum · Lists retinoid, silicones, coconut derivatives
Naturium
Retinaldehyde Cream Serum 0.10%
Serum · Lists retinoid, silicones, coconut derivatives
Naturium
Retinaldehyde Cream Serum 0.15%
Serum · Lists retinoid, silicones, coconut derivatives
Naturium
Retinol Complex Serum
Serum · Lists retinoid, coconut derivatives
The INKEY List
Retinol Eye Cream
Eye cream · Lists fragrance allergens, retinoid, coconut derivatives
Murad
Retinol Youth Renewal Eye Serum
Eye cream · Lists fragrance, retinoid
Null
rêve de miel
7ml · Label from Maroc · Ingredients incomplete, can’t check
L’Oréal
Revitalift Laser Nuit
50 ml · Label from France · Lists fragrance, fragrance allergens, drying alcohol, silicones, salicylic acid
Allies of Skin
Rhassoul & BHA Antioxidants Purifying Mask
Mask · Lists exfoliating acid, salicylic acid, coconut derivatives
The Ordinary
Rice Lipids + Ectoin Microemulsion
Moisturizer · None of Poliage’s flag groups listed
Olaplex
RICH HYDRATION MASK
Conditioner · 200 mL · Lists fragrance, fragrance allergens, drying alcohol, exfoliating acid, coconut derivatives
Yves Rocher
Riche Crème Baume Régénérant Nutrition Intense
50 ml · Label from France · Lists fragrance, fragrance allergens, drying alcohol, coconut derivatives
Auchan
Rik & Rok douche shampoing et bain moussant fruits rouges
750 ml · Label from France · Lists fragrance, sulfates, coconut derivatives
R+Co
RING TONE Curl Defining Gel
Hair styling · 6 OZ · Lists fragrance, fragrance allergens, drying alcohol, coconut derivatives
Yves Rocher
Riparazione - Shampoo Trattamento Nutri-Riparatore
300ml · Label from Italy and Sweden · Lists fragrance, exfoliating acid, sulfates, salicylic acid, coconut derivatives
Nivea
Rock Salts Body Wash
Body wash · 16.9 mL · Lists fragrance, sulfates, coconut derivatives
Fekkai
Root Lift
Hair styling · 5 oz · Lists fragrance, fragrance allergens, exfoliating acid
Bath & Body Works
Rose Water & Ivy Gentle & Clean Foaming Hand Soap
259 mL, 8.75 fl oz · Label from Canada · Lists fragrance, fragrance allergens, coconut derivatives
Alverde
Rough Nature Bartserum
75 ml · Label from Germany · Lists fragrance, fragrance allergens, drying alcohol, coconut derivatives
Williams
Rpk will deo stk 2x75ml
150 ml · Label from France · Lists fragrance, fragrance allergens, drying alcohol
The Ordinary
Saccharomyces Ferment 30% Milky Toner
Toner · None of Poliage’s flag groups listed
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.
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