Ferric Chloride 40%

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Ferric Chloride 40%: A Comprehensive Overview

Ferric Chloride 40%: An Essential Chemical for Water Treatment and Etching

Ferric chloride, commonly known as iron(III) chloride, is a widely used chemical compound in various industries, notably for water treatment and as an etching agent in the production of printed circuit boards.

Chemical Properties

Ferric chloride is an inorganic compound with the formula FeCl3. It is a brownish-black or dark brown crystalline solid when anhydrous, but it’s often encountered as a liquid solution, like the 40% concentration.

Appearance and Odor

In its 40% solution form, ferric chloride appears as a dark brown liquid. It has a slight, pungent odor reminiscent of hydrochloric acid.

Reactivity and Other Features

Ferric chloride is known for its strong Lewis acidic properties. It reacts with alkali metals and carbonates to produce hydrogen gas. This reactivity makes it effective in water treatment processes, especially in the flocculation and coagulation of suspended particles.


Ferric chloride has various applications, primarily stemming from its coagulating properties and its role as an etching agent.

Water Treatment

In water treatment processes, ferric chloride is utilized as a coagulant to remove impurities and contaminants. Its ability to cause particles to clump together and settle out of the water column is invaluable for ensuring clean water supplies.

Etching Agent

Electronics manufacturers utilize ferric chloride as an etching solution for printed circuit boards (PCBs). Its corrosive properties enable the precise removal of unwanted copper, producing detailed and efficient PCB designs.

Handling and Storage

Ferric chloride, especially in concentrated forms, requires careful handling and proper storage conditions to maintain its efficacy and ensure safety.

Protective Measures

When working with ferric chloride, it is vital to wear protective equipment, including gloves, goggles, and aprons. This will prevent skin burns and protect the eyes from potential splashes.

Storage Conditions

The chemical should be stored in a cool, dry place, away from incompatible materials like alkali metals and bases. Containers should be sealed tightly to prevent moisture absorption, which can lead to reduced potency and product degradation.


Ferric Chloride 40% is a versatile chemical compound with significant applications in water treatment and electronics manufacturing. Ensure to source high-quality ferric chloride for optimal results in your operations. Following strict safety and storage guidelines is essential for safe and efficient use of this compound.

Ferric Chloride SDS PDF - 237KB