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Sodium Hydroxide

Also-called-like-this: lye
What-it-does: buffering

Official CosIng Information

Details

The unfancy name for it is lye. It’s a solid white stuff that’s very alkaline and used in small amounts to adjust the pH of the product and make it just right. 

For example, in case of AHA or BHA exfoliants, the right pH is super-duper important, and pH adjusters like sodium hydroxide are needed.  

BTW, lye is not something new. It was already used by ancient Egyptians to help oil and fat magically turn into something else. Can you guess what? Yes, it’s soap. It still often shows up in the ingredient list of soaps and other cleansers.

Sodium hydroxide in itself is a potent skin irritant, but once it's reacted (as it is usually in skin care products, like exfoliants) it is totally harmless.

Products with Sodium Hydroxide

Beauty Drops Aha 30% + Bha 2% Peeling Klairs Rich Moist Facial Soap T3 Ada Gel Acne.org Aha+ (Glycolic Acid - 10%) Aisuanis Energy Complex Ahas Exfoliating Toner Avoskin Naufa Pure Olive Oil Bar Soap Bioderma Sebium Serum Bioderma Sébium Night Peel Bliss That'S Incredi-Peel Clinique ID Active Cartridge Concentrate - for Pores & Uneven Texture D'lumiere Esthetique Aha 20% Anti Aging Serum Dr Bronner Lavender Soap Bar Dr. Bronner's Organic Eucalyptus Soap Bar Dr. Bronner's Organic Green Tea Soap Bar Dr. Bronner's Organic Tea Tree Pure-Castile Soap Bar Dr. Bronner's Pure-Castile Bar Soap Florence by Mills One Swipe Glow Wipe Treatment Pads Glossier Solution Glytone Rejuvenating Cream 20 Innoderm Teranex Soap KERSTIN FLORIAN Correcting Intensive Renewal Glycolic 15 Kayman Beauty Coalface Soap Kojie san Skin Lightening Soap L’anza Healing Color Care Color-Preserving Trauma Treatment Medik8 Glycolic Acid Activator Nip+Fab Glycolic Fix Concentrate Extreme 10% Nuvo Active With Tcc + Mint Bar Soap Paula's Choice Skin Perfecting 8% Aha Gel Exfoliant Pixi Glow Tonic Pixi Glow Tonic Proactiv Step 2 Toner Proactive+ Revitalizing Toner SCT Gluta Kojic Ultra Soap Skin Authority Instant Perfection Peel Pads The Inkey List 15% Vitamin C And EGF Serum Urban Skin Rx Clear & Even Tone Clarifying Glycolic Pads ASAP Daily Facial Cleanser Apolosophy Aloe Vera Gel BOSCIA Resurfacing Treatment Toner With Apple Cider Beauty Bay Acid Trip Exfoliating Toner Beauty Bay Skinhit Correcting Serum Benefit Cosmetics Benetint Bioderma White Objective Sérum Clear Skin Days by Sephora Collection Brightening Peel Pads Cordes Bpo 5% Gel Dermaceutic Mela Cream Dermasence Seborra Serum Ethique Eco-Friendly Face Cleansing Bar, In Your Face First Aid Beauty Skin Rescue Acne Clearing Pads With White Clay FÜNFSINNE Multi Tonic 6% Aha Gesichtswasser Und Peeling