Ethylene Sulfite (Glycol Sulfite), CAS 3741-38-6, is a high-performance organic sulfite solvent with exceptional electrochemical stability and chemical purity. Manufactured by Symb ChemTech, our Ethylene Sulfite meets the stringent demands of next-generation energy storage, pharmaceutical synthesis, and specialized industrial formulations.
As a leading Ethylene Sulfite supplier, we provide research-grade, technical-grade, and battery-grade Glycol Sulfite to customers worldwide. Our state-of-the-art production facilities ensure consistent quality,批次-to-批次 reproducibility, and competitive pricing for both small-scale R&D and large-volume industrial applications.
What is Ethylene Sulfite?
Ethylene Sulfite, chemically known as 1,3,2-Dioxathiolane 2,2-dioxide, is a five-membered cyclic sulfite ester with the molecular formula C₂H₄O₃S. This colorless, odorless liquid possesses unique solvent properties that make it invaluable in:
- Electrochemical applications — as a film-forming additive in lithium-ion battery electrolytes
- Pharmaceutical synthesis — as a reaction medium and protecting group reagent
- Industrial coatings — as a high-boiling-point solvent with excellent thermal stability
Product Specifications
Technical Parameters
| Property | Specification |
|---|---|
| CAS Number | 3741-38-6 |
| Chemical Name | Ethylene Sulfite (Glycol Sulfite) |
| Molecular Formula | C₂H₄O₃S |
| Molecular Weight | 108.11 g/mol |
| Appearance | Clear, colorless liquid |
| Purity (GC) | ≥99.5% (standard), ≥99.9% (battery grade) |
| Water Content (KF) | ≤100 ppm |
| Color (APHA) | ≤20 |
| Density @ 25°C | 1.42 g/mL |
| Boiling Point | 173°C |
| Melting Point | -11°C |
| Flash Point | 76°C |
| Refractive Index @ 20°C | 1.445 |
| Solubility | Miscible with water and most organic solvents |
Purity Grades Available
Symb ChemTech offers Ethylene Sulfite in multiple purity grades to match your application requirements:
| Grade | Purity | Water Content | Target Application |
|---|---|---|---|
| Technical Grade | ≥99.0% | ≤500 ppm | Industrial formulations |
| Pharmaceutical Grade | ≥99.5% | ≤200 ppm | Pharmaceutical synthesis |
| Battery Grade | ≥99.9% | ≤50 ppm | Lithium-ion battery electrolytes |
| Electrochemical Grade | ≥99.95% | ≤30 ppm | Supercapacitors, specialized batteries |
Key Properties and Benefits
Electrochemical Excellence
Ethylene Sulfite serves as a critical film-forming additive in lithium-ion battery electrolytes. When added at concentrations of 1-5%, it:
- Stabilizes the solid electrolyte interphase (SEI) on graphite anodes
- Improves cycle life by preventing electrolyte decomposition
- Enhances high-temperature stability of the battery cell
- Reduces impedance growth during repeated charge-discharge cycles
Research published in the Journal of The Electrochemical Society confirms that Ethylene Sulfite forms a stable, Li⁺-conductive SEI layer that significantly improves battery performance under extreme conditions.
Chemical Stability
The cyclic sulfite structure provides:
- Excellent thermal stability — stable up to 200°C without decomposition
- Wide electrochemical window — stable from 0V to 4.5V vs. Li/Li⁺
- Low viscosity — 16.3 mPa·s at 25°C for easy electrolyte formulation
- Low vapor pressure — minimal evaporation during processing
Versatile Solvent Properties
Glycol Sulfite functions as an effective solvent for:
- Organic synthesis — reaction medium for pharmaceutical intermediates
- Polymer processing — solvent for specialty polymers and resins
- Coatings and inks — carrier solvent with excellent film-forming properties
- Extraction — selective extraction of natural products
Industrial Applications
1. Lithium-Ion Battery Technology
Ethylene Sulfite is a proven SEI-forming additive in commercial lithium-ion batteries. Major battery manufacturers incorporate Glycol Sulfite into their electrolyte formulations for:
- Consumer electronics — smartphones, laptops, tablets
- Electric vehicles — EV batteries requiring long cycle life
- Energy storage systems — grid-scale storage solutions
- Power tools — high-drain applications
Recommended concentration: 1-5% by weight in standard electrolyte formulations (1M LiPF₆ in EC/DMC/EMC)
2. Pharmaceutical Synthesis
In pharmaceutical manufacturing, Ethylene Sulfite serves as:
- Protecting group reagent for hydroxyl and amine groups
- Reaction medium for stereoselective synthesis
- Extraction solvent for natural product isolation
- Crystallization aid for active pharmaceutical ingredients (APIs)
Our Pharmaceutical Grade Glycol Sulfite meets ICH Q3C residual solvent guidelines.
3. Industrial Coatings and Polymers
Glycol Sulfite’s unique properties make it valuable in:
- Electrode coatings — binder solvent for lithium-ion battery electrode fabrication
- Specialty coatings — high-performance industrial coatings
- Adhesive formulations — solvent for pressure-sensitive adhesives
- Polymer synthesis — reaction medium for polymerization reactions
4. Supercapacitors and Energy Storage
Electrochemical Grade Ethylene Sulfite is used in:
- Electric double-layer capacitors (EDLCs)
- Lithium-ion capacitors
- Hybrid supercapacitors
- Redox flow batteries
Quality Assurance
Manufacturing Excellence
Symb ChemTech operates cGMP-compliant manufacturing facilities with:
- Multi-stage distillation and purification systems
- Automated quality control at every production stage
- Closed-loop processing to minimize contamination
- Batch traceability from raw materials to final product
Quality Certifications
- ISO 9001:2015 — Quality Management System
- ISO 14001:2015 — Environmental Management
- cGMP Compliance — Pharmaceutical Grade products
- REACH Compliance — European market access
Testing and Analysis
Every batch undergoes comprehensive testing:
| Test | Method | Specification |
|---|---|---|
| Purity | Gas Chromatography (GC) | ≥99.5% / ≥99.9% |
| Water Content | Karl Fischer Titration | ≤100 ppm / ≤50 ppm |
| Color | APHA Colorimetry | ≤20 APHA |
| Acidity | Titration | ≤50 ppm (as H₂SO₄) |
| Sulfate | Ion Chromatography | ≤100 ppm |
| Metals | ICP-MS | ≤1 ppm each |
| Particle Count | Light Obscuration | ≤100 particles/mL (>0.5μm) |
Technical Documentation
Each shipment includes:
- Certificate of Analysis (CoA)
- Material Safety Data Sheet (MSDS/SDS)
- Technical Data Sheet (TDS)
- Handling and Storage Guidelines
- Transportation Classification (DOT, IATA, IMDG)
Handling and Storage
Storage Conditions
| Parameter | Recommendation |
|---|---|
| Temperature | 15-30°C (59-86°F) |
| Humidity | <50% relative humidity |
| Container | Sealed, nitrogen-padded containers |
| Material | Glass, HDPE, or lined steel drums |
| Shelf Life | 24 months from manufacture date |
Safety Precautions
Ethylene Sulfite should be handled with appropriate personal protective equipment (PPE):
- Respiratory protection — NIOSH-approved respirator when handling large quantities
- Eye protection — Safety goggles or face shield
- Hand protection — Chemical-resistant gloves (nitrile or butyl rubber)
- Skin protection — Lab coat and chemical splash apron
First Aid Measures:
- Eye contact: Rinse immediately with water for 15 minutes
- Skin contact: Wash with soap and water; remove contaminated clothing
- Inhalation: Move to fresh air; seek medical attention if symptoms occur
- Ingestion: Do NOT induce vomiting; seek immediate medical attention
Regulatory Information
- TSCA (USA): Listed
- REACH (EU): Pre-registered
- EINECS/ELINCS: 223-132-4
- WHMIS (Canada): Not classified
- GHS Classification: Skin irritation (Category 3), Eye irritation (Category 2B)
Packaging Options
Symb ChemTech offers flexible packaging to meet your volume requirements:
| Package Size | Container Type | Application |
|---|---|---|
| 100 mL | Amber glass bottle | R&D, pilot studies |
| 500 mL | Amber glass bottle | Laboratory use |
| 1 L | Amber glass bottle / HDPE | Small-scale synthesis |
| 5 L | HDPE jerricans | Medium-scale production |
| 20 L | Steel drum (lined) | Industrial applications |
| 200 L | Steel drum (lined) | Large-volume users |
| IBC Tote (1000 L) | Custom packaging | Continuous process |
Why Choose Symb ChemTech?
Our Advantages
- Consistent Quality — Rigorous QC ensures batch-to-batch reproducibility
- Custom Synthesis — We can produce Ethylene Sulfite to your exact specifications
- Technical Support — Our chemists provide application guidance and troubleshooting
- Global Supply Chain — Reliable delivery to customers worldwide
- Competitive Pricing — Cost-effective solutions without compromising quality
- Rapid Response — Fast quotes and sample shipment
- Technical Documentation — Complete CoA, MSDS, and technical support
High-Purity Ethylene Sulfite for Your Industrial Needs
At Symb ChemTech, we specialize in delivering high-grade Ethylene Sulfite (CAS 3741-38-6) to meet the diverse requirements of our global clients. As a trusted supplier in the chemical industry, we ensure the purity, performance, and consistency of this valuable compound for various applications, including lithium-ion batteries, solvent systems, and electrochemical processes.
Why Choose Symb ChemTech’s Ethylene Sulfite?
- Superior Quality Assurance: Manufactured under strict quality control, our Ethylene Sulfite offers exceptional purity and performance.
- Global Compliance: Adheres to international standards, making it suitable for a wide range of industrial applications.
- Customized Solutions: Available in various grades and packaging to meet your specific requirements.
- Reliable Supply Chain: Efficient logistics ensure timely delivery, no matter where you are located.
Product Details – Ethylene Sulfite CAS 3741-38-6
- Chemical Name: Ethylene Sulfite
- CAS Number: 3741-38-6
- Molecular Formula: C2H4O3S
- Applications:
- Solvent for lithium-ion batteries
- Additive in electrolytes
- Intermediate for chemical synthesis
- Catalyst in various chemical reactions
Applications of Ethylene Sulfite
- Lithium-Ion Batteries:
- Enhances electrolyte performance and stability.
- Reduces degradation in battery systems, improving longevity.
- Chemical Synthesis:
- Acts as a versatile intermediate in creating specialty chemicals.
- Solvent Systems:
- Used as a solvent in coatings, adhesives, and other industrial products.
Why Ethylene Sulfite is a Critical Industrial Compound
Ethylene Sulfite plays a key role in enhancing the efficiency and sustainability of modern industrial processes. Its ability to serve as a solvent, electrolyte additive, and intermediate makes it indispensable in cutting-edge technologies such as renewable energy storage and advanced manufacturing.
Partner with Symb ChemTech Today
When you choose Symb ChemTech as your supplier, you gain access to:
- Competitive pricing without compromising quality.
- Expert technical support to help optimize your applications.
- A reliable partner with a strong track record in the chemical industry.
Order Ethylene Sulfite CAS 3741-38-6 Now
Take the first step towards improving your processes with high-quality Ethylene Sulfite. Contact us today for a quote, technical specifications, or any questions. Our team is ready to assist you with your needs.