Nitric Acid 65% ACS Grade

Nitric Acid 65% ACS Grade (NITRIC_ACID_65) is a high-purity aqueous solution of nitric acid (HNO₃) formulated for analytical and industrial use. This ACS-grade reagent delivers a precise 65% w/w concentration in water, balancing strong oxidizing power with manageable handling characteristics. The solution is colorless to pale yellow, with a pungent, acrid odor, and is designed to meet stringent quality standards for laboratory and manufacturing environments. Its robust specification supports reliable performance in analytical methods, sample preparation, and chemical synthesis where trace metal control and purity are critical.

As a widely used mineral acid, this product demonstrates excellent miscibility with water and a defined specification set that ensures batch-to-batch consistency. The material is maintained under controlled conditions to prevent decomposition, maintain low residue, and minimize contaminants. The low impurity profile, including tightly controlled heavy metals and anion content, makes it suitable for high-sensitivity applications such as HPLC mobile phases, sample digestion, and nitrate production. Compliance with ACS Reagent Grade and USP-NF Monograph standards further reinforces its reliability for both routine and specialized workflows.

Key Properties

• Appearance: Colorless to pale yellow liquid
• CAS: 7697-37-2
• Odor: Pungent, acrid odor
• Boiling Point: 120°C
• Freezing Point: -42°C
• Solubility: Miscible with water
• Density (25°C): 1.41 g/mL
• Specific Gravity (20°C): 1.41–1.43 (typical 1.42)
• Molecular Weight: 63.01 g/mol
• Vapor Pressure (20°C): 5 mmHg
• Refractive Index (20°C): 1.36
• Viscosity (25°C): 1.2 cP
• Residue (max): 0.001% (typical 0.0005%)

Common Applications

• Application Category: HPLC Mobile Phase – Used as a mobile phase component in reversed-phase high-performance liquid chromatography for separation of organic compounds, enabling improved peak shape and reproducibility in analytical workflows.
• Application Category: Nitrate Production – Utilized in chemical manufacturing for the synthesis of nitrates used in fertilizers and energetic materials, with precise acid strength supporting process control.
• Application Category: Metal Etching – Acts as an etchant for metals in microfabrication and surface finishing, providing controlled material removal and defined edge definition.
• Application Category: pH Adjustment – Employed in water treatment and process streams to adjust acidity, with careful handling to avoid corrosion of equipment and ensure system compatibility.
• Application Category: Oxidizing Agent – Serves as a potent oxidant in pharmaceutical synthesis and chemical transformations, contributing to reaction pathways that require strong oxidizing conditions.

Safety Precautions

Handle and store in a cool, dry, well-ventilated area away from incompatibles. Use compatible containers (HDPE or glass) and ensure secondary containment is in place. Wear appropriate PPE, including chemical-resistant gloves, splash-resistant goggles, and a splash shield or face shield when handling concentrated solutions. Store away from reducing agents, organic materials, and bases, and protect from light and moisture to preserve stability.

In case of exposure, follow emergency procedures: for skin contact, remove contaminated clothing and rinse with plenty of water; for eye exposure, rinse cautiously with water for several minutes and seek medical attention; for inhalation, move to fresh air and provide supportive care; for ingestion, do not induce vomiting and seek medical attention. The product is designated as UN 2031, Nitric acid, Class 8, PG II, reflecting its corrosive and reactive nature and the need for proper transport and handling protocols.

Benefits

✔ High-purity ACS-grade specification– Meets ACS Reagent Grade and USP-NF monograph requirements for reliable analytical performance and trace metal control. ✔ Consistent formulation– ±1.0% assay tolerance with a narrow color and impurity profile to minimize interference in analytical workflows. ✔ Low residue and metal content– Strictly controlled for iron, heavy metals, and inorganic impurities to support high-sensitivity methods. ✔ Reliable physical properties– Defined density, viscosity, and vapor pressure across standard operating ranges to support precise process design and safety compliance.