Nitric Acid ACS Reagent CAS 7697-37-2

Chemical Name: Nitric AcidCAS Number: 7697-37-2Molecular Formula: HNO₃Molecular Weight: 63.01 g/molGrade: ACS / Reagent GradePhysical State: LiquidAppearance: Colorless to very slightly colored liquid for typical ACS 68–70% material. Current supplier specifications list ACS 68–70% nitric acid with APHA color ≤10. (Sigma-Aldrich)Synonyms: Hydrogen Nitrate, Azotic Acid, Aqua Fortis

Product Description

Nitric Acid, ACS/Reagent Grade, is a high-purity inorganic acid and strong oxidizing agent used in analytical laboratories, chemical processing, sample preparation, metal treatment, and research applications. A common ACS specification is 68–70% HNO₃, although other concentrations, including ≥90%, are also supplied, so the exact concentration must be confirmed against the product specification and CoA. (Sigma-Aldrich)

Typical Applications

• Analytical and reagent laboratories

• Sample preparation and digestion

• Chemical synthesis

• Metal processing and surface treatment

• Analytical testing and quality control

• Research & development

• Chemical processing

• Laboratory acidification and preparation

Product Specifications

For a representative ACS 70% specification, Sigma-Aldrich lists an assay of 68.0–70.0%, density around 1.413 g/mL at 20–25°C, and APHA color ≤10. (Sigma-Aldrich)

Safety & Documentation

Nitric acid is classified as a corrosive and oxidizing hazardous material; current ACS product listings include GHS03 (oxidizer), GHS05 (corrosion), and GHS06 (acute toxicity) pictograms for applicable formulations. (Sigma-Aldrich)

• Certificate of Analysis (CoA), subject to supplied product

• Safety Data Sheet (SDS)

• Technical/product specification

• Laboratory and commercial packaging

• Bulk and repeat procurement subject to product availability

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