Chemical laboratory

Sulfuric Acid Electrolyte

High-Purity Battery Electrolyte for Industrial Applications

  • CAS 7664-93-9
  • Formula H₂SO₄
  • Flash Pt N/A °C
  • Density Approximately 1.395 g/cm³ (for 50% solution)
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Physical & Chemical Properties

Property Value Unit
Boiling point Approximately 114°C (for 50% solution) °C
Flash point N/A °C
Density Approximately 1.395 g/cm³ (for 50% solution) g/cm³
Solubility Miscible with water -
Ph < 1 (for 50% solution) -
Molecular weight 98.08 g/mol g/mol
Melting point Approximately -35°C (for 50% solution) °C
Vapor pressure Approximately 0.16 mmHg at 20°C (for 50% solution) mmHg
Autoignition temp N/A -
Appearance Clear, colorless to slightly turbid liquid -
Odor Odorless -
Vapor density 3.4 (air = 1) g/cm³

Overview

Sulfuric Acid Electrolyte (H₂SO₄, CAS 7664-93-9) is a high-purity aqueous solution of sulfuric acid specifically formulated for battery and electrochemical applications. This clear, colorless liquid with a molecular weight of 98.08 g/mol serves as a critical component in lead-acid batteries and various industrial processes requiring precise pH control and reliable electrochemical performance. Our sulfuric acid electrolyte maintains consistent concentration and purity levels essential for optimal battery efficiency and extended service life.

Key Applications

The primary use of sulfuric acid electrolyte is in lead-acid battery manufacturing, where it facilitates the electrochemical reactions necessary for energy storage and discharge. In chemical synthesis, it serves as a powerful catalyst and reactant for producing various organic and inorganic compounds. The solution excels in pH adjustment applications, providing precise acidic conditions for water treatment, metal processing, and chemical manufacturing. Additionally, it functions as a reliable laboratory reagent for analytical testing, titrations, and research applications requiring high-purity acid solutions.

Safety & Handling

Sulfuric acid electrolyte is a highly corrosive substance with a pH less than 1 that requires careful handling procedures. Since it has no flash point or autoignition temperature, fire hazards are minimal, but the solution can react violently with water and organic materials. Essential personal protective equipment includes chemical-resistant gloves, safety goggles, face shields, and acid-resistant clothing. Work areas must have adequate ventilation to prevent vapor accumulation, and emergency eyewash stations and safety showers should be readily accessible. Always add acid to water, never water to acid, to prevent dangerous exothermic reactions.

Storage & Shelf Life

Store sulfuric acid electrolyte in corrosion-resistant containers made of high-density polyethylene (HDPE) or glass, away from incompatible materials such as metals, bases, and organic compounds. Maintain storage temperatures between 15-25°C in a cool, dry, well-ventilated area away from direct sunlight and heat sources. The product has an extended shelf life when stored properly in original, unopened containers. Key incompatibilities include strong bases, reactive metals, and combustible materials, which can cause dangerous reactions or container degradation.

Why Alliance Chemical

Alliance Chemical provides reliable supply of high-quality sulfuric acid electrolyte with same-day shipping from our Taylor, Texas facility. We offer flexible shipping options including UPS for smaller quantities, LTL for moderate volumes, and FTL for bulk orders to meet your specific delivery requirements. Every shipment includes comprehensive Safety Data Sheets (SDS) and Certificates of Analysis (COA) to ensure product quality and regulatory compliance. Our Sulfuric Acid Electrolyte meets stringent purity standards and is backed by our commitment to exceptional customer service and technical support.

Shipping & Availability

Parcel Shipping

UPS Ground supports pints, quarts, and most 1-gallon packages nationwide.

LTL Freight

5-gallon pails, drums, and totes move via LTL carriers such as ABF Freight, SEFL, Saia, and XPO.

Full Truckload

FTL available for palletized bulk orders. Competitive freight rates.

Local Pickup

Same-day pickup at our Taylor, TX warehouse for Texas customers.

SDS, COA, and TDS available for every product • Same-day shipping on orders before 1 PM CT

Frequently Asked Questions

What is sulfuric acid electrolyte (H2SO4, CAS 7664-93-9) and what is it used for?
Sulfuric acid electrolyte (H2SO4, CAS 7664-93-9) is a strong inorganic acid commonly supplied as a liquid, often offered in a 50% w/w electrolyte grade. It is used as a battery electrolyte and in industrial and laboratory applications such as electroplating, metal pickling, chemical synthesis, and analytical reagents.
How should I store 50% sulfuric acid electrolyte and what is its shelf life?
Store in tightly sealed, corrosion-resistant containers in a cool, dry, well-ventilated area away from incompatible materials and heat sources. When properly sealed it is chemically stable for years, though exposure to air or moisture can change concentration, so verify concentration or request a recent COA before critical use.
What are the main safety and handling precautions for sulfuric acid electrolyte?
Sulfuric acid is highly corrosive and can cause severe skin burns and eye damage; always use chemical-resistant gloves, eye/face protection, and acid-resistant clothing and work with adequate ventilation. Follow the SDS for emergency procedures; small spills can be neutralized and absorbed with appropriate materials and large releases require evacuation and trained response.
How does the 50% concentration affect performance and hazards compared with other concentrations?
A 50% w/w solution has different density, conductivity and corrosivity than more dilute or more concentrated grades; higher concentrations generally increase corrosive power and heat released on dilution. For electrolyte and process performance, follow the specified concentration and never add water to acid (always add acid to water under controlled conditions).
What documentation is provided with sulfuric acid electrolyte?
Suppliers typically provide a Safety Data Sheet (SDS), Certificate of Analysis (COA) showing concentration and purity, and a technical data sheet; transport and regulatory documents can be provided on request. For critical uses request batch-specific COAs and trace impurity data.
How is 50% sulfuric acid electrolyte shipped and packaged?
It is classified as a corrosive hazardous material and is shipped in approved containers such as HDPE drums, plastic carboys, IBCs or tankers with appropriate labeling and documentation. Specific packaging, labeling and transport paperwork follow regional DOT/IMDG/IATA regulations and depend on quantity and destination.
Which materials are compatible or incompatible with sulfuric acid electrolyte?
Compatible materials include PTFE (Teflon), glass, and certain polyethylene (HDPE) grades; some metals such as lead may be usable under specific conditions. It is incompatible with strong bases, many organic materials, and reactive metals (e.g., aluminum, zinc, carbon steel) which can corrode or produce hazardous reactions.
What are the typical technical specifications for 50% sulfuric acid electrolyte?
Typical specs: CAS 7664-93-9, formula H2SO4, concentration 50% w/w, appearance clear colorless to slightly yellow liquid, approximate specific gravity ~1.40 g/mL at 20°C; exact purity and impurity limits are given on the COA. Request supplier-specific technical data for tolerance and analytical details.
Which industries and specific applications use sulfuric acid electrolyte?
Common industries include battery manufacturing (lead-acid electrolytes), metal finishing and electroplating, metal pickling and cleaning, chemical production, and research laboratories for synthesis and analysis. End-users range from industrial processors to laboratory facilities requiring a consistent acid electrolyte.
How can I purchase 50% sulfuric acid electrolyte and what should I expect for availability?
Sulfuric acid electrolyte is available from chemical distributors in lab-sized bottles up to drums, IBCs and bulk tanker deliveries; minimum order quantities and lead times vary by supplier and region. Contact suppliers for pricing, COA, SDS, minimum order, delivery options and any regulatory or transport requirements.

Documentation & Downloads

Safety Data Sheet
SDS / MSDS
Request COA
Certificate of Analysis
Technical Data Sheet (TDS)
Available for all products

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