chelating agent

Etidronic Acid

INCI: ETIDRONIC ACID
CAS 2809-21-4 EC 220-552-8
Phosphonic acid, (1-hydroxyethylidene)bis-
Generally Safe
This ingredient has a good safety profile based on available data.
Purpose

Function

Chelating agent, perfume excipient
Profile

Properties

Silicone
Silicone free
Malassezia
Safe
Fungal Acne
Safe
Details

Description

Phosphonic acid, (1-hydroxyethylidene)bis-

EU Restricted — Annex III
2 official EU restrictions with concentration limits & label requirements
View details →
Reference

Identifiers

CAS Number
2809-21-4
EC Number
220-552-8
INCI
ETIDRONIC ACID
Category
chelating agent
Updated
Apr 2, 2026