Potassium Hydroxide (KOH) – Alkaline pH Adjuster and Saponifying Agent

Potassium Hydroxide (KOH) is a high-purity alkaline compound widely used in cosmetic science and soap making. It serves as both a pH adjuster and a saponifying agent, converting oils into potassium-based liquid soaps. Because of its strong alkalinity, it is used in carefully controlled amounts to create safe, effective, and stable cleansing formulations.

Recommended Usage Rate

Depending on the purpose, formulators typically use Potassium Hydroxide between 0.1% and 5%. Small amounts are ideal for pH adjustment, while higher concentrations are required during the saponification process in liquid soap making. Proper stability testing is recommended before commercial production.

pH and Chemical Properties

KOH is strongly alkaline with a solution pH ranging from 12 to 14. Due to its caustic nature, it must be accurately diluted and incorporated with care to maintain product safety, stability, and performance.

Solubility and Form

Potassium Hydroxide is fully soluble in water and typically supplied in pellets or flakes. Always add KOH to water slowly, allowing it to dissolve completely before incorporating it into a formulation. Never pour water directly onto solid KOH.

Function in Skincare and Cleansing Systems

KOH functions as a powerful pH regulator and soap-forming agent. It enables the production of liquid soaps, shampoos, and other potassium-based cleansing systems. When used correctly, it also helps support emulsion stability in creams and cleansing formulas requiring slight alkalinity.

Safety and Handling

Because Potassium Hydroxide is caustic in raw form, it must be handled with protective gloves and eyewear. Avoid direct skin or eye contact and ensure accurate dilution before including it in any cosmetic formulation.

Related Ingredients

In cleanser formulations, KOH is often paired with surfactants such as
Decyl Glucoside
or humectants like
Vegetable Glycerin
to create balanced, effective cleansing systems.

Additional Research

For more information on KOH safety and cosmetic usage guidelines, consult reputable scientific resources such as
NCBI.

Ingredient Summary

INCI Name: Potassium Hydroxide

Recommended Usage Rate: 0.1% – 5%

Solubility: Fully water-soluble

pH: 12 – 14 (alkaline)

Form: Pellets or flakes

Disclaimer

For formulation use only. Use protective equipment when handling. Avoid direct contact with skin or eyes. OrganicsbyJumira is not responsible for misuse or improper handling.