Cosmetic ingredient

TETRASODIUM ETIDRONATE

Tetrasodium Etidronate is a sodium compound related to etidronic acid. It is not an oil, plant extract, or treatment active: it is a chemical substance used in small amounts to help a preparation retain its intended characteristics during use and storage.

2D molecular structure

CAS number

3794-83-0

EC number

223-267-7

Molecular formula

C2H4Na4O7P2

Molecular weight

293.96

Chemical name

Tetrasodium (1-hydroxyethylidene)bisphosphonate

InChIKey

KWXLCDNSEHTOCB-UHFFFAOYSA-J

TETRASODIUM ETIDRONATE: what it is

The word "tetrasodium" distinguishes this form by identifying four sodium ions associated with etidronate. That salt form matters because the label names a specific chemical species, not simply a broad reference to etidronic acid or to another etidronate carrying a different number of sodium ions.

TETRASODIUM ETIDRONATE: what it does in cosmetics

In cosmetics, Tetrasodium Etidronate can bind trace metals in the mixture. By limiting the interference of those metals with other components, it helps the formula stay stable. Its job is within the preparation itself; it is not included to give skin or hair an immediate soft feel.

It can also support a more even-looking emulsion and help the product keep the consistency it was designed to have. In practical terms, this is useful when lotions, creams, or cleansing products need to retain a consistent texture and appearance from one use to the next, without making a direct cosmetic-performance claim on its own.

Use limits