Nitric Acid 98%

Nitric Acid 98%

CAS Number: 7697‑37‑2

Synonyms: Nitric acid; Aqua fortis; Hydrogen nitrate; Fuming nitric acid (≥98%)

Chemical Formula:HNO₃

Molecular Weight:63.01 g/mol

Product Introduction

A highly corrosive, colorless to pale-yellow fuming liquid (≥98.5% w/w HNO₃), miscible in all proportions with water. Used extensively in nitrations, oxidations, etching, explosives, fertilizers, and specialty chemical synthesis.

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Physical & Chemical Properties

Property Value
Appearance Colorless to yellowish fuming liquid
Odor Acrid, suffocating
Density @ 20 °C 1.51 g/mL (98%)
Melting Point −42 °C
Boiling Point 83 °C (pure), 121 °C (68% azeotrope)
Vapor Pressure @ 20 °C 48 mm Hg
Refractive Index (n₂₀ᴅ) 1.397 at 16.5 °C
Solubility Fully miscible with water
pKₐ −1.4
Flash Point Non‑flammable, but oxidizer

Applications

  • Nitration: Plastics, dyes, pesticides, explosives
  • Oxidizer:In rocket propellants, metal etching, and nanoparticle doping
  • Production:Precursor to ammonium nitrate fertilizers, adipic acid, caprolactam, and nitrocellulose
  • Laboratory reagent: Sample digestion, analytical acids, rock/PCB etching

Safety & Handling

  • Highly corrosive & oxidizer: GHS H290/H314/H331. Emits toxic fumes—use ventilation and acid-resistant PPE.
  • Storage: Corrosion-resistant containers (glass, HASTELLOY), away from organics and sunlight. UN 2031 Class 8 PG I.

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