Potassium Hydroxide
Potassium Hydroxide is a buffering ingredient. It’s in 254 products on Poliage, most often body lotion, shampoo and cleanser. Avoid lists on Poliage that include it: none.
Updated October 21, 2026
In plain English
Potash lye. Used in small amounts to adjust pH or to turn fats into soap.
What it does
Contains Potassium Hydroxide: buffering
Function listed in CosIng
Source: CosIng, the European Commission cosmetic ingredient database, ref 36981, accessed October 22, 2026. Also listed as kalii hydroxidum.
Products that contain Potassium Hydroxide
Kiehl’s Since 1851
Ultra Facial Oil-Free Cleanser
None of Poliage’s flag groups listed
Derma E
Ultra Hydrating Alkaline Cloud Cleanser
Cleanser · Lists fragrance, coconut derivatives
First Aid Beauty
Ultra Repair Hydrate + De-Puff Eye Cream with Hyaluronic Acid
Eye cream · None of Poliage’s flag groups listed
Vichy
Vichy normadem phytosolution
Lists fragrance, coconut derivatives
Missha
Vita C Plus Clear Complexion Foaming Cleanser
Cleanser · Lists essential oils, coconut derivatives
Derma E
Vitamin C Even Tone Brightening Mask
Mask · Lists exfoliating acid, essential oils
Renee Rouleau
Vitamin C&E Treatment
Serum · Lists essential oils, silicones
Renee Rouleau
Vitamin Infused Cleansing Emulsion
Cleanser · Lists retinoid, coconut derivatives
Essence
Volume Stylist 18h Lash Extension Mascara
Mascara · Lists drying alcohol
Versed
Weekend Glow Overnight Brightening Mask
Mask · Lists exfoliating acid, retinoid
Essence
What The Fake! Volumizing & Lengthening Mascara
Mascara · None of Poliage’s flag groups listed
whole blends coconut oil and cocoa butter shampoo and conditioner
Lists fragrance, fragrance allergens, sulfates, silicones, coconut derivatives
Thayers
Witch Hazel Facial Toner Uncented
None of Poliage’s flag groups listed
Medicube
Zero Foam Cleanser
Cleanser · Lists fragrance, coconut derivatives
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