Sulfuric acid is one of the most important bulk chemicals used in modern industry. Among different grades, 98% sulfuric acid is the most widely produced and traded concentration because it offers excellent chemical reactivity, stability, and transport efficiency.
Introduction to 98% Sulfuric Acid
What is 98% Sulfuric Acid
Sulfuric Acid (H₂SO₄) is a strong inorganic acid widely used in industrial chemistry. The 98% concentration represents a highly concentrated industrial grade that is commonly produced through the contact process.
Key characteristics include:
Chemical formula: H₂SO₄
Typical concentration: 98% by weight
Appearance: Colorless to slightly yellow viscous liquid
Properties:
Strong acidity
Powerful dehydrating agent
Strong oxidizing ability under certain conditions
Because of these chemical properties, sulfuric acid can participate in a wide range of industrial reactions including synthesis, dehydration, catalysis, and purification processes.
Why 98% Concentration Is Widely Used
The 98% concentration is considered the most practical and stable form of sulfuric acid for industrial use.
Main reasons include:
High chemical stability: 98% sulfuric acid is less likely to decompose during storage.
Efficient transportation: Higher concentration reduces transportation volume and cost.
Versatile industrial use: Suitable for chemical synthesis, metal treatment, and refining processes.
Compatibility with industrial equipment: Many industrial reactors and pipelines are designed to handle this concentration.
As a result, 98% sulfuric acid is widely traded globally as a standard industrial raw material.
Key Industrial Applications of 98% Sulfuric Acid
Fertilizer Manufacturing
The fertilizer industry is the largest consumer of sulfuric acid worldwide.
Approximately 60–70% of global sulfuric acid production is used to manufacture phosphate fertilizers.
Major applications include:
Production of phosphoric acid (H₃PO₄) from phosphate rock
Manufacturing of phosphate fertilizers such as:
MAP (Monoammonium Phosphate)
DAP (Diammonium Phosphate)
Superphosphate
Sulfuric acid reacts with phosphate rock to produce soluble phosphate compounds, which are essential nutrients for agricultural crops.
Petroleum Refining and Oil Processing
Sulfuric acid is widely used in the petroleum refining industry for improving fuel quality.
Alkylation Process
In refineries, sulfuric acid serves as a catalyst in alkylation units.
This process combines light hydrocarbons to produce high-octane gasoline components, which improve engine performance and fuel efficiency.
Fuel Purification
Sulfuric acid is also used to:
Remove impurities
Reduce undesirable compounds
Improve the overall purity of petroleum products
This makes it an important chemical for producing cleaner fuels.
Chemical Manufacturing
98% sulfuric acid is a fundamental raw material for large-scale chemical production.
Production of Inorganic Chemicals
It is used in the synthesis of many inorganic compounds, including:
Hydrochloric Acid
Nitric Acid
Sulfate salts
Various industrial catalysts
These chemicals are widely used in industrial processing, mining, and manufacturing.
Production of Organic Chemicals
Sulfuric acid also plays a critical role in organic synthesis. It is used to produce:
Detergents and surfactants
Synthetic dyes
Synthetic fibers
Explosives
Pharmaceutical intermediates
Its dehydrating and catalytic properties make it essential in many chemical reactions.
Metal Processing and Surface Treatment
Sulfuric acid is widely used in metallurgical and metal finishing processes.
Steel Pickling
In steel manufacturing, sulfuric acid is used for pickling, a process that removes oxide scale formed during hot rolling.
Benefits include:
Cleaner metal surfaces
Improved coating adhesion
Higher product quality
Non-Ferrous Metal Processing
Sulfuric acid is also used in the extraction and refining of non-ferrous metals such as:
Copper
Zinc
Nickel
It plays a key role in leaching, purification, and electrochemical processes.
Battery Manufacturing
Another important application is the production of lead-acid batteries.
Lead-Acid Battery Electrolyte
Sulfuric acid is the primary electrolyte used in lead-acid batteries, which are widely used in:
Automotive batteries
Industrial backup batteries
UPS (Uninterruptible Power Supply) systems
The acid enables electrochemical reactions between lead plates, generating electrical energy.
Industrial Energy Storage Systems
Lead-acid batteries are commonly used for:
Backup power systems
Telecommunications equipment
Renewable energy storage
This makes sulfuric acid an important material in the energy storage industry.
Water Treatment Applications
Sulfuric acid is widely used in industrial water treatment and wastewater management.
PH Adjustment
In water treatment plants, sulfuric acid is used to:
Lower pH levels
Neutralize alkaline wastewater
Maintain optimal chemical conditions for treatment processes
Chemical Production for Treatment
Sulfuric acid is also used to produce water treatment chemicals such as:
Aluminum sulfate (alum)
Ferric sulfate
These chemicals act as coagulants or flocculants, helping remove suspended solids and impurities from water.
Textile and Paper Industry
Sulfuric acid is also used in several manufacturing steps in the textile and pulp & paper industries.
Textile Processing
Applications include:
Dye manufacturing
Fiber processing
pH control during textile finishing
Paper Manufacturing
In paper production, sulfuric acid is used in:
Pulp processing
Chemical reactions during bleaching or treatment
This helps improve paper strength and processing efficiency.
Advantages of Using 98% Sulfuric Acid in Industry
High Chemical Reactivity
Sulfuric acid reacts with a wide range of substances, making it suitable for diverse industrial chemical reactions.
Strong Dehydrating Ability
Its powerful dehydrating property is useful for:
Organic synthesis
Chemical drying processes
Catalyst reactions
Cost-Effective Bulk Chemical
Sulfuric acid is produced on a large industrial scale, making it one of the most cost-efficient industrial acids available.
Wide Industrial Compatibility
Because of its chemical versatility, sulfuric acid can be used across many sectors including:
Chemical manufacturing
Metallurgy
Energy storage
Water treatment
Agriculture
Safety Considerations When Handling 98% Sulfuric Acid
Corrosive Hazards
Sulfuric acid is highly corrosive and can cause severe burns if it comes into contact with skin or eyes.
Proper safety equipment is required, including:
Chemical-resistant gloves
Protective clothing
Safety goggles or face shields
Storage Requirements
For safe storage:
Use corrosion-resistant tanks such as carbon steel or specialized alloys
Maintain well-ventilated storage areas
Avoid contact with incompatible materials
Transportation Standards
Sulfuric acid must be transported according to hazardous chemical regulations, using:
Certified chemical containers
Tank trucks or IBC tanks
Proper labeling and safety documentation
How to Choose High-Quality 98% Sulfuric Acid Suppliers
For industrial buyers, selecting a reliable supplier is essential for stable production.
Purity and Quality Standards
Different industries may require different grades, such as:
Industrial Grade Sulfuric Acid
Battery Grade Sulfuric Acid
Consistent purity ensures stable chemical performance.
Packaging Options
Common packaging options include:
35 kg or 50 kg drums
1000 L IBC tanks
Bulk tanker delivery
Buyers should choose packaging based on storage capacity and transportation needs.
Certifications and Compliance
Reliable suppliers typically provide certifications such as:
ISO quality certification
REACH compliance
SGS testing reports
These certifications ensure product quality and regulatory compliance.
Stable Supply Capacity
Large-scale industrial operations require suppliers with:
Consistent production capacity
Reliable logistics
Long-term supply stability
This helps prevent production interruptions and procurement risks.
Conclusion
98% sulfuric acid is one of the most essential industrial chemicals in the world. Its strong acidity, high reactivity, and cost efficiency make it indispensable across many industries.
It is widely used in:
Fertilizer production
Petroleum refining
Chemical manufacturing
Metal processing
Battery production
Water treatment
For industrial buyers, choosing high-quality sulfuric acid and reliable suppliers is critical for ensuring stable production, product quality, and operational safety.