Nitric acid

CAS Number
7697-37-2
EC Number
231-714-2
Molecular Weight
63.013 g/mol

Description

Nitric acid (CAS 7697-37-2), also known as spirit of niter, is a strong inorganic acid and powerful oxidizing agent used across industrial chemistry for acidification and metal processing. Its reactivity with metals and organic substrates makes it a primary feedstock in manufacturing rather than a specialty additive. In agriculture, it serves as a direct input for producing ammonium nitrate.

This links bulk acid procurement directly to crop nutrition supply chains. Metal finishing and electronics manufacturers use it to etch, passivate, and clean copper, stainless steel, and semiconductor substrates. Pharmaceutical and fine chemical producers rely on the acid for nitration reactions that introduce nitro groups into active pharmaceutical intermediates. It is essential for complex chemical synthesis.

In mining and hydrometallurgy, it dissolves base and precious metals during leaching and refining operations. This versatility makes it a staple in heavy industrial and metallurgical processing facilities. The product is supplied as an aqueous solution, with concentrations of 68% and 98–100% being the most commercially traded grades. Technical grade is standard for most industrial use cases.

Higher-purity electronic and reagent grades are available for semiconductor and analytical applications. Bulk liquid delivery in tankers and IBC containers is the norm for industrial buyers.

Other Names (Synonyms)

spirit of niter|hydrogen nitrate|HONO2|HNO₃|fuming nitric acid|engraver's acid|aqua fortis|HNO3

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Safety & Handling (Learn More)

Danger
GHS03· Oxidizing GHS05· Corrosive GHS06· Toxic GHS09· Environmental Hazard GHS08· Health Hazard

Hazard Statements

H272 May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]
H314 Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
H330 Fatal if inhaled [Danger Acute toxicity, inhalation]
H331 Toxic if inhaled [Danger Acute toxicity, inhalation]
H290 May be corrosive to metals [Warning Corrosive to Metals]
H318 Causes serious eye damage [Danger Serious eye damage/eye irritation]
H370 Causes damage to organs [Danger Specific target organ toxicity, single exposure]
H372 Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]
H402 Harmful to aquatic life [Hazardous to the aquatic environment, acute hazard]
H304 May be fatal if swallowed and enters airways [Danger Aspiration hazard]

Documentation

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