HEDP (1-Hydroxyethylidene-1,1-diphosphonic Acid) – Powerful Chelating and Corrosion Inhibitor

🧪 CAS Number: 2809-21-4

🌟 Product Description

HEDP is an organophosphonate chemical widely recognized for its strong chelating and corrosion-inhibiting properties. It has high solubility in hard water and effectively binds metal ions, making it suitable for use in water treatment, detergents, and industrial cleaning applications. With its high stability in acidic, neutral, and alkaline environments, it provides long-term protection in various systems.

🏭 Applications

Cooling water corrosion inhibition

Industrial water treatment chemicals

Detergent and cleaning formulations

Paper and textile processing

Oilfield chemical applications

📊 Physical & Chemical Properties

Appearance: Colorless to light yellow liquid

Odor: Slight characteristic odor

Molecular Formula: C2H8O7P2

Molecular Weight: 206.02 g/mol

pH (1% solution, 25 °C): 2.0 – 2.5

Solubility: Fully miscible with water

⚠️ Storage & Safety

HEDP should be stored in cool, dry, and well-ventilated areas. It must be kept in suitable plastic or stainless-steel tanks to avoid reactions with metal ions. Direct contact with skin and eyes should be avoided; gloves, goggles, and masks are recommended during handling.

🔑 Keywords

HEDP, CAS 2809-21-4, corrosion inhibitor, chelating agent, water treatment, organophosphonate

📛 Other Names

Etidronic Acid, 1-Hydroxyethylidene Diphosphonic Acid