70% Sulphuric Acid Reagent Clear Liquid High Concentration For Laboratory Use

Reagent Sulfuric Acid 70% is a high-purity acid solution (typically meeting ACS specifications) that provides consistent, moderate acidity with reduced fuming, lower viscosity, and far safer handling than concentrated 96–98% grades. It is widely adopted as a convenient, ready-to-use stock acid for battery electrolyte preparation, a reliable medium for analytical methods, and a controlled reagent for synthetic and environmental applications.

• Lead-Acid Battery Filling and Activation: The most common stock concentration used to prepare battery electrolyte. By diluting 70% acid with distilled water to a specific gravity of 1.22–1.28 (around 33–37% H₂SO₄), manufacturers and service centers achieve accurate, safe filling with minimal heat generation.
• Battery Manufacturing: Supplied as a high-purity, trace-metal-controlled electrolyte source that prevents self-discharge, extends plate life, and ensures dependable battery performance.

• Safe Dilution Stock: Preferred over 98% acid for preparing dilute sulfuric acid solutions (1 M, 3 M, 6 M) due to dramatically reduced splashing, fuming, and heat of dilution.
• COD Digestion: Used as the acid reagent in Chemical Oxygen Demand determinations where a defined sulfuric acid concentration is specified for reproducible oxidation.
• Sample Preservation: Acidifies water, wastewater, and soil extracts for ammonia, nitrate, phosphate, and trace metal analysis; its moderate concentration is easier to dispense accurately in the field.
• Carbohydrate and Colorimetric Tests: Applied in the phenol‑sulfuric acid method for total carbohydrate determination, providing controlled acidity for consistent color development without excessive charring.

• Mild Hydrolysis and Catalysis: Promotes the hydrolysis of esters, amides, and nitriles under controlled conditions; the 70% strength limits over‑oxidation and charring of sensitive substrates.
• Condensation Reactions: Effective in Knoevenagel, Pechmann, and similar condensations where concentrated acid might cause polymerization or decomposition.
• Protecting Group Removal: Used in peptide synthesis and carbohydrate chemistry for selective deprotection requiring a moderate acid environment.

• Ion Exchange Resin Regeneration: Conveniently diluted on-site to 5–10% solutions for regenerating cation exchange resins in demineralizers and water softeners, ensuring high purity and minimal heavy metal contamination.
• TOC/TIC Analysis: Applied in total organic carbon analyzers to remove inorganic carbon reliably without aggressive attack on instrument components.
• Soil and Plant Tissue Extraction: Serves as the acid component in standard soil nutrient extractants (e.g., Mehlich‑III) and in plant tissue digestion for nutrient analysis.

• Metal Surface Treatment: Used in diluted form for pickling and activating copper, brass, and mild steel surfaces before plating or coating, offering effective oxide removal without the hazards of fuming acids.
• High-Purity Sulfate Production: Starting material for preparing reagent-grade metal sulfates used in analytical standards, catalysts, and pharmaceutical excipients.