TRISODIUM PHOSPHATE ●
TL;DR. This ingredient is primarily an alkaline pH adjuster and buffering salt. It can also help bind hardness minerals in water, which supports clarity and stability in aqueous formulas.
What does TRISODIUM PHOSPHATE do in a cosmetic formula?
This ingredient is primarily an alkaline pH adjuster and buffering salt. It can also help bind hardness minerals in water, which supports clarity and stability in aqueous formulas.
Is TRISODIUM PHOSPHATE clean?
From a clean-beauty perspective, this ingredient is generally accepted at low formulation levels but has some friction because it is strongly alkaline and can be irritating if the finished product pH is not well controlled. It is not a common restricted-list ingredient, but its use depends heavily on final formula context.
Is TRISODIUM PHOSPHATE sustainable?
This material is mineral-derived and typically made through inorganic chemical processing rather than renewable sourcing. It is water-soluble and not a persistent organic pollutant, but phosphorus discharge can contribute to nutrient loading in waterways.
Is TRISODIUM PHOSPHATE COSMOS-approved?
It can be compatible with COSMOS-natural products when it meets mineral-origin and processing requirements, but it does not align with COSMOS-organic sourcing because it is inorganic and non-agricultural. Its Green Chemistry profile is mixed, with simple water-phase functionality and low organic persistence, balanced against nonrenewable sourcing and nutrient-runoff concerns.
How does TRISODIUM PHOSPHATE work chemically?
The molecule is a fully ionized inorganic salt made of sodium cations and a highly basic phosphorus-oxygen anion, giving aqueous solutions a high pH, often around 11 to 12 depending on concentration. It is typically used at low levels as needed for pH and buffering, is stable to oxidation, and can interact with calcium, magnesium, or electrolyte-sensitive thickeners.
Last updated 2026-05-14