Product Overview

Nitric Acid 69% AR/ACS (CAS No. 7697-37-2) is a concentrated aqueous mineral acid with pronounced oxidising and proton-donating behaviour. It supports acid digestion, oxidation–reduction reactions, nitrate formation, and dissolution of compatible metals and inorganic materials, making it an important reagent in classical analytical and preparative chemistry.

The AR/ACS grade is intended for analytical reagent preparation, quality-control testing, research, and laboratory procedures requiring controlled acid strength and restricted reagent-derived impurities. It is also relevant to precious-metal purification: nitric acid can selectively remove silver and certain base metals from suitably prepared gold alloys, while its combination with hydrochloric acid in aqua regia enables the dissolution and refining of gold.

Typical Applications

• Oxidative digestion of compatible laboratory samples
• Preparation of nitrate salts and nitrate-containing reagents
• Acidification of analytical solutions and reaction media
• Oxidation–reduction studies and wet-chemical procedures
• Dissolution of compatible metals and inorganic materials
• Purification of suitable gold–silver alloys by nitric-acid parting
• Preparation of aqua regia for gold and precious-metal refining
• Routine analytical, quality-control, and research laboratory work

Common Synonyms

• Hydrogen Nitrate
• Aqua Fortis
• Azotic Acid

Storage Conditions

Store in the original, tightly closed, chemically compatible container in a cool and well-ventilated location. Protect the solution from direct sunlight, excessive heat, and contamination. Keep it in dedicated acid storage, appropriately segregated from incompatible materials, and reseal the container promptly after dispensing to preserve concentration and reagent quality.