ACS Grade Basic Inorganic Chemicals 72 Percent Sulfuric Acid Reagent Clear Liquid

Reagent Sulfuric Acid 72% is a high-purity acid solution (typically meeting ACS specifications) that provides strong acidity with markedly lower dehydrating and oxidizing power than 96–98% grades. Its moderate concentration ensures safer handling, easier dilution, and controlled reactivity, making it especially suitable for battery electrolyte preparation, analytical methods, and processes requiring precise, moderate acid strength.

• Lead-Acid Battery Filling and Activation: The preferred stock acid for blending with distilled water to achieve the exact specific gravity required (typically 1.22–1.28, corresponding to about 33–37% H₂SO₄). The 72% concentration allows accurate, safer dilution compared to 98% acid, ensuring high purity and long battery service life.
• Battery Manufacturing: Used as a clean, trace-metal-controlled electrolyte source that prevents self-discharge and plate degradation.

• Precise Dilution Stock: Convenient and safer to handle for preparing dilute sulfuric acid solutions (e.g., 1 M to 6 M) with minimal splashing and heat generation.
• COD Digestion: Supplied as the acid medium in Chemical Oxygen Demand methods that specify a defined acid concentration for consistent oxidation.
• Sample Preservation and pH Adjustment: Acidifies water and wastewater samples for ammonia, nitrate, phosphate, and trace metals prior to analysis.
• Carbohydrate Analysis: Used in the phenol‑sulfuric acid method where controlled acidity prevents excessive charring while ensuring accurate color development.

• Mild Hydrolysis and Catalysis: Promotes hydrolysis of esters, amides, and nitriles under controlled conditions, reducing the risk of over‑oxidation or charring of sensitive molecules.
• Condensation Reactions: Effective in Knoevenagel and Pechmann condensations where high acid strength can lead to side reactions or polymerization.
• Protecting Group Removal: Applied in peptide and carbohydrate chemistry for selective deprotection steps requiring a moderate acid environment.

• Resin Regeneration: Easily diluted on‑site to 5–10% solutions for regenerating cation exchange resins in demineralizers and water softeners, with minimal heavy metal contamination.
• TOC and TIC Analysis: Used in total organic carbon analyzers that require a specific sulfuric acid concentration to reliably strip inorganic carbon without damaging instrument components.
• Soil and Plant Tissue Extraction: Serves as the acid component in Mehlich‑III and other soil nutrient extractants.

• Metal Surface Pickling: Used in diluted form to clean and activate surfaces of copper, brass, and mild steel before plating or coating, where strong fuming acids are unsuitable.
• Specialty Sulfate Production: Starting material for preparing high‑purity metal sulfates for catalysts, pharmaceutical excipients, and analytical standards.