High Purity Liquid Reagent Sulfuric Acid 20 Percent Dilute Acid Solution

Reagent Sulfuric Acid 20% is a high-purity, moderately dilute acid solution (typically meeting ACS specifications) that offers controlled acidity with minimal dehydrating, oxidizing, and charring action. Its low viscosity, very safe handling profile, and negligible heat of dilution make it the preferred ready-to-use reagent for teaching laboratories, sensitive analytical work, and processes requiring a precise, mild acid environment.

• General Chemistry Experiments: The standard acid for student experiments involving reaction rates, stoichiometry, acid-base titrations, and preparation of salts, due to its greatly reduced hazard compared to concentrated acid.
• Safe Acid Handling Training: Used to introduce proper acid handling techniques without the extreme dangers of fuming, severe burns, or spattering.

• Ready-to-Use Dilute Acid: Eliminates the need for hazardous dilution of concentrated acid, serving directly as a 20% (approximately 2.5 M) stock for further dilution or immediate use in procedures.
• pH Adjustment: Used to acidify aqueous samples, buffers, and culture media with fine control and minimal risk of overshooting the target pH.
• Colorimetric and Spectrophotometric Determinations: Provides the acidic medium in methods for silica, phosphate, and certain metals where a dilute acid matrix is specified (e.g., molybdosilicate or molybdenum blue methods).
• Cleaning and Rinsing Agent: Prepares mild acid rinses for glassware and plasticware to remove alkaline residues and metal traces without attacking the substrate.

• Sample Preservation: Acidifies water, wastewater, and soil extracts for subsequent nutrient (ammonia, nitrate, phosphate) and trace metal analysis; the 20% concentration is exceptionally safe for field use and minimizes container corrosion.
• Ion Exchange Resin Regeneration: Can be used directly or diluted slightly for regenerating small laboratory-scale cation exchange columns in water purification systems.

• Mild Acid Catalyst: Suitable for reactions requiring dilute acid conditions, such as certain ester hydrolyses, acetal deprotections, or the formation of hydrazones that decompose in stronger acid.
• Work-Up and Extraction: Used to neutralize basic reaction mixtures and wash organic phases, providing a clean, trace-metal-controlled acid source.

• Surface Preparation: Applies a gentle acid wash to metals like copper and brass for light oxide removal prior to soldering, bonding, or painting, without the corrosive fumes of stronger acids.
• pH Control in Process Water: Used where precise acidity is required, such as in cooling water systems, dye baths, and textile processing, ensuring reliable, contaminant-free performance.
• High-Purity Diluent: Serves as the starting acid for preparing large volumes of more dilute reagent-grade sulfuric acid for manufacturing and quality control laboratories.