Sodium Hydroxide[1] ●
TL;DR. This ingredient is primarily a pH adjuster and neutralizing agent. It raises alkalinity, helps activate gelling polymers, and supports soap formation in true soap-based formulas.
What does Sodium Hydroxide[1] do in a cosmetic formula?
This ingredient is primarily a pH adjuster and neutralizing agent. It raises alkalinity, helps activate gelling polymers, and supports soap formation in true soap-based formulas.
Is Sodium Hydroxide[1] clean?
It is broadly accepted in clean beauty frameworks when used to set finished-product pH. Skin and eye irritation potential is driven by final formula alkalinity, so use is typically tightly controlled.
Is Sodium Hydroxide[1] sustainable?
This material is mineral-derived and commonly produced from brine through energy-intensive electrolysis. It does not biodegrade in the usual organic sense, but it neutralizes in water and does not persist as an intact organic pollutant.
Is Sodium Hydroxide[1] COSMOS-approved?
It is permitted under COSMOS standards for allowed technical functions such as pH adjustment and soap processing. Its Green Chemistry profile is mixed, with simple mineral sourcing and no organic persistence, but a relatively energy-intensive manufacturing route.
How does Sodium Hydroxide[1] work chemically?
This material is a fully dissociating inorganic strong base in water, which makes it effective at neutralizing acids, converting fatty acids into soaps, and adjusting polymer rheology. In many leave-on formulas it is added q.s. to target pH and often remains below 1%, with handling and formulation control focused on dilution heat and final pH.
Last updated 2026-05-13