What is Nitric Acid ?

Last updated: 5 Feb 2026

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Nitric Acid 68% is an aqueous solution of nitric acid (HNO₃) with a concentration of approximately 68% by weight. It is classified as a strong acid and is widely used in industrial applications and laboratories due to its high corrosiveness and strong chemical reactivity.

Physical and Chemical Properties

Clear liquid, colorless to pale yellow
Decomposes to release reddish-brown nitrogen oxide gases, which are highly toxic
Strong, pungent, irritating odor
Highly soluble in water

Working Principles of Nitric Acid 68%

Acts as a strong acid, dissociating to release a high concentration of hydrogen ions (H⁺), which accelerates chemical reactions and surface etching

Possesses oxidizing properties, enabling it to accept electrons from other substances and promote chemical transformations

Highly corrosive to metals and organic materials, making it effective for metal cleaning and surface preparation prior to manufacturing processes

Industrial Applications
Metal Industry
Used for metal surface cleaning, rust removal, and elimination of contaminants prior to plating or coating processes.

Chemical Industry
Serves as a raw material for the production of various chemicals, and is used in synthesis reactions and chemical conditioning processes.

Electronics Industry
Used for surface cleaning and in the manufacturing processes of printed circuit boards (PCBs).

General Industry
Applied for pH adjustment and in processes requiring a strong and stable acid.

Storage and Handling

Store in acid-resistant containers and keep tightly closed.