Nitric Acid(HNO3) CAS 7697-37-2
As a highly qualified global chemical manufacturer and bulk exporter, we provide premium-grade 68% Nitric Acid tailored specifically for heavy industrial applications. With strictly monitored low chloride and heavy metal impurity thresholds, our product serves as a core chemical building block for multi-industry sectors including nitrogen fertilizer manufacturing, stainless steel metal pickling, dye synthesis, and advanced chemical nitration reactions.
- Precise 68% Concentration Control: Every batch is manufactured under rigorous process controls to maintain a stable, predictable assay, preventing variance in sensitive downstream chemical synthesis.
- Dual Chemical Potency: Operates simultaneously as a powerful strong acid and a top-tier oxidizing agent, enabling efficient metal passivation and organic molecule transformation.
- Minimal Impurity Profiles: Extremely low levels of iron, sulfate, and heavy metal ions, minimizing catalog interference during catalysis or industrial washing workflows.
- Compliant Hazardous Cargo Logistics: Fully certified packaging and global shipping documentation compliant with IMDG regulations for Class 8 (Sub-risk 5.1) hazardous substances.
Nitric acid Description
NAME: Nitric Acid (HNO3)
Molecular Formula: HNO3
Molecular Weight: 63.013
CAS NO.: 7697-37-2
Density: 1.41g/mLat 20°C
Boiling point: 120.5°C(lit.)
Melting point: -42 °C
flashing point: 120.5°C
Appearance: Colorless or yellow fuming liquid
Solubility: Miscible with water.
Packaging, Storage, and Global Logistics Handling
Nitric Acid is classified internationally as a Class 8 Corrosive Substance with a Class 5.1 Oxidizing Agent sub-risk (UN Number: 2031, Packing Group II). It demands specialized maritime logistics attention.
Package: Standard net weight 34kg or 35kg UN-approved HDPE drums (Gross Weight ~36.5kg) configured on sturdy pallets with comprehensive protective stretch wrapping.
1000L high-density composite intermediate bulk containers for high-volume chemical processing plants.
Storage: Must be stored exclusively in cool, dry, and excellently ventilated hazardous material warehouses away from direct solar radiation. The storing floor must be constructed with acid-resistant, impermeable concrete. Strictly isolate from combustible materials, organic solvents, reducing agents, and strong alkalis.
Operator Safety Measures: Nitric acid causes severe chemical skin burns and eye lesions. Operators must wear full acid-resistant aprons, heavy chemical gloves, safety boots, and positive-pressure face shields. In case of accidental skin or eye contact, flush instantly with massive amounts of running water for at least 15 minutes and seek urgent medical treatment.
About Us: With over many years as a certified Nitric Acid manufacturer, we combine innovation with stringent production standards to deliver high-performance product.
What are other terms for Nitric Acid (HNO3)?
Other names include Aqua fortis, Hydrogen nitrate, Acidum nitricum, Azotic acid. Commercially, it’s sometimes referred to by trade names such as Fluka Nitric acid; Nitric Acid Omnitrace Ultra; Optima Nitric Acid; Nitric Acid ACS Reagent; GFS nitric acid.
Acidum nitricum Technical
| Item | Index |
| Appearance | Colorless or yellow fuming liquid |
| Vapor Density | 1 (vs air) |
| Vapor Pressure | 8 mm Hg ( 20 °C) |
| Fp | 120.5°C |
| PH | 3.01(1 mM solution);
2.04(10 mM solution); 1.08(100 mM solution); |
As a certified Nitric Acid factory, we adhere to strict quality protocols, with every batch undergoing rigorous testing to ensure consistent efficacy and safety.
Hydrogen nitrate Applications
Our high-potency 68% Nitric Acid is distributed worldwide to satisfy demands across diverse manufacturing sectors:
- Metal Surface Treatment, Pickling & Passivation: In the metallurgical and steel processing industries, concentrated nitric acid is indispensable for removing oxides, rust, and scale from stainless steel surfaces. It initiates a highly uniform passivating oxide layer on metals, markedly boosting their long-term atmospheric corrosion resistance.
- Industrial Fertilizer Manufacturing: Serves as the foundational liquid precursor for producing ammonium nitrate, potassium nitrate, and advanced compound NPK plant nutrients essential to international agricultural supply chains.
- Organic Synthesis & Polymer Intermediates: Highly sought after as a fundamental nitration reagent to manufacture chemical intermediates for polyurethanes, polyamides, nitrobenzene, and precursors used in specialized synthetic rubbers.
- Clean-in-Place (CIP) Solutions & Industrial Washing: Extensively utilized in automated CIP cycles within the food, dairy, and beverage industries to effectively dissolve stubborn scale deposits, calcium milk stones, and alkaline residues inside stainless steel pipes and blending vessels.
- Wastewater & Environmental Biological Treatment: Used as a reliable nitrogen source for microbial nutrients in biological industrial effluent processing plants, correcting nutrient imbalances during large-scale wastewater remediation.
Nitric Acid Product FAQ
Q1: Why does some concentrated Nitric Acid turn yellowish over time?
Nitric acid is inherently unstable under exposure to light or heat. It undergoes slow thermal/photolytic decomposition, yielding trace amounts of nitrogen dioxide (NO2). This gas dissolves back into the liquid phase, giving the acid a yellowish tint. This light discoloration does not significantly degrade its overall acidic or oxidizing performance in industrial applications.
Q2: Can 68% Nitric Acid be stored in standard carbon steel tanks?
No. While concentrated nitric acid above 98% (fuming) can passivate and be stored in certain aluminum vessels, 68% concentrated nitric acid actively attacks and corrodes mild carbon steel. It must be stored in specialized 304 or 316L stainless steel storage tanks, or high-density cross-linked polyethylene (XLPE) containers equipped with proper venting.
Q3: What is the typical lead time for a 20ft container shipment of Nitric Acid?
Because Nitric Acid falls under strict international hazardous goods regulations, maritime booking and customs declarations require a longer lead time than non-hazardous chemicals. Generally, the shipping dispatch window is 14 to 21 days from order confirmation through our global trade divisions.
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