Etidronic Acid

Etidronic Acid

AKA “2809-21-4, 1-Hydroxyethylidene-1, 1-diphosphonic acid, HEDP, EHDP, Etidronsaeure, Turpinal SL, Acetodiphosphonic acid, Hydroxyethanediphosphonic acid, Acido etidronico”

Acid

Ingredient Facts

Etidronic acid

AKA: 2809-21-4, 1-Hydroxyethylidene-1, 1-diphosphonic acid, HEDP, EHDP, Etidronsaeure, Turpinal SL, Acetodiphosphonic acid, Hydroxyethanediphosphonic acid, Acido etidronico

Acid · Chelating · EWG: 4

Synthetic

Chelating Agent

Acid

Not Clean

Phosphonic acid, (1-hydroxyethylidene)bis-

Solubility 1.15e+01 g/L

Formula

C2H8O7P2

Mol. Weight

206.03

CAS #

2809-21-4

Form

Liquid

State

Liquid; Dry Powder

See origin →

Functions

Chelating

Grabs onto metal ions in water that would destabilize the formula. Keeps your product from going bad or changing color.

Removes Metal Ions

Binds metal ions

Traditional Use

Synthesized in the mid-20th century as a chelating agent. Developed to prevent mineral deposits and oxidation in cosmetic formulations, improving product stability.

Skin Types

●all-skin-types

Best For

General

Pregnancy & Breastfeeding Safe

Caution

EWG

CIR

Safe as used

Pregnancy

Caution

CIR Safety Findings

Not a Sensitizer

medical-approval

all-shades-safe

Concentration Guide

1.5%

0%2%

Reg. Limit

EU regulatory limit: 1.5%. (a) 1.5% (as etidronic acid) (b) 0.2% (as etidronic acid) Source: EU Cosmetics Regulation (EC) 1223/2009, Annex III (Restricted Substances), Entry 53.