Description
Specifications Table
Product Name – Sulfuric Acid, AR Grade, 95-98%
Quantity/Pack Size – 500mL, 250mL, 100mL
Form – Clear Viscous Liquid
Grade – AR (Analytical Reagent)
Application – Sample digestion, organic synthesis, acid catalysis, electrolyte preparation
Product Overview
AR Grade Sulfuric Acid stands as one of the most fundamental and versatile reagents in laboratory chemistry, offering exceptional purity with strictly controlled impurities that could compromise analytical results. The 95-98% concentration provides the optimal balance between reactivity and handling characteristics, delivering a powerful dehydrating agent and strong mineral acid in a single reagent. This grade’s ultra-low heavy metal content (typically <0.1 ppm for most metals) makes it particularly suitable for trace element analysis where contamination must be minimized. The acid's unique properties—including its high boiling point (337°C), strong oxidizing capability when hot, and ability to act as both an acid and dehydrating agent—make it indispensable for sample digestion procedures in elemental analysis. In organic chemistry, it serves as a catalyst for esterification, alkylation, and sulfonation reactions where its strong acidic nature and water-absorbing properties drive reactions to completion. The AR designation ensures compliance with international reagent standards, guaranteeing consistent performance in quantitative analyses. Safety considerations are paramount as concentrated sulfuric acid presents multiple hazards: it is highly corrosive to tissues, generates significant heat when diluted, and can react violently with water or organic materials. Proper storage in vented, corrosion-resistant containers is essential to maintain purity and prevent container rupture from gas generation. The acid's hygroscopic nature requires careful handling to prevent absorption of atmospheric moisture that could alter its concentration over time.
FAQs
1. What is the proper procedure for diluting concentrated sulfuric acid?
Add acid extremely slowly to cold water while stirring continuously, never the reverse. Use a heat-resistant container and perform the operation in a fume hood. The highly exothermic reaction requires careful temperature control.
2. How does AR grade sulfuric acid differ from battery acid?
AR grade offers higher purity (95-98%) with strict controls on heavy metals and other impurities, critical for laboratory applications. Battery acid typically contains additives and may have lower purity (30-35% H₂SO₄).
3. Can this acid be used for cleaning laboratory glassware?
Yes, but typically in diluted form (10-20%) for removing organic residues. For inorganic deposits, concentrated acid may be used with proper safety precautions. Always rinse thoroughly with deionized water afterward.
4. What materials are compatible for storing sulfuric acid?
Use containers made of borosilicate glass, PTFE, or high-density polyethylene. Never store in metal containers (except for certain alloys) as the acid will corrode most metals, potentially causing dangerous leaks.
5. Why does my sulfuric acid solution turn brown over time?
Brown coloration typically indicates organic contamination or oxidation products. For critical applications, use only freshly opened AR grade acid and store in tightly sealed containers away from organic materials.
