Tetrasodium Etidronate
AKA “3794-83-0, Tarpinel 4NL, Turpinal 4NL, Sequion 10Na4, etidronate tetrasodium, Defloc EN 43, Dequest 2016, UNII-CZZ9T1T1X4, EINECS 223-267-7”
Ingredient
Ingredient Facts
Tetrasodium etidronate
AKA: 3794-83-0, Tarpinel 4NL, Turpinal 4NL, Sequion 10Na4, Etidronate tetrasodium, Defloc EN 43, Dequest 2016, UNII-CZZ9T1T1X4, EINECS 223-267-7
Ingredient · Emulsion Stabilising · EWG: 4
Synthetic
Emulsifier
Chelating Agent
Not Clean
Tetrasodium (1-hydroxyethylidene)bisphosphonate
Formula
C2H4Na4O7P2
Mol. Weight
293.96
CAS #
3794-83-0
State
Liquid; Pellets or Large Crystals; Dry Powder, Liquid
See origin →
Functions
Chelating
Grabs onto metal ions in water that would destabilize the formula. Keeps your product from going bad or changing color.
Emulsion Stabilising
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Viscosity Controlling
Removes Metal Ions
Stabilizes Emulsion
Controls Viscosity
Binds metal ions
Keeps product blended
Controls product thickness
Traditional Use
Modern synthetic chelating compound developed for cosmetic formulations to sequester minerals and improve product stability. Designed to prevent unwanted chemical reactions without traditional use.
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Caution
Tetrasodium Etidronate
European Commission
EU Cosmetic Ingredient Database (CosIng)
Tetrasodium Etidronate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
What Is Tetrasodium Etidronate and How Is It Related to Formaldehyde?
Liou YL, Boyd A, Hylwa SA
Dermatitis : contact, atopic, occupational, drug, 2018
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR