Ethylene sulfite (99.9%)

• CAS: 3741-38-6
• Catalog Number: ALC-FP-3741386
• Category: Featured Products
• Appearance: Colorless to light yellow transparent liquid
• Acid Value: ≤ 50 mg/kg
• Assay: ≥ 99.90 %
• Ca: ≤ 5 ppm
• Cl: ≤ 5 ppm
• Cr: ≤ 5 ppm
• Cu: ≤ 5 ppm
• Fe: ≤ 5 ppm
• K: ≤ 5 ppm
• Na: ≤ 5 ppm
• Ni: ≤ 5 ppm
• Pb: ≤ 5 ppm
• Sample Lot No.: 240423
• Water Content: ≤ 200 ppm (KF)
• Zn: ≤ 5 ppm

Case Study

Ethylene Sulfite for SEI Engineering in Li-Ion Batteries

Carlier L, et al. Journal of Power Sources, 2025, 656, 238073.

Ethylene sulfite (ES) was applied as a functional additive in a 20 vol% acetonitrile-containing carbonate electrolyte to enhance LiNi₀.₅Mn₀.₃Co₀.₂O₂/graphite pouch cell performance at -5 °C. Electrolyte properties-including ionic conductivity, viscosity, and Li⁺ solvation-were characterized via Raman spectroscopy. SEI formation and Li⁺ transport were systematically analyzed using electrochemical impedance spectroscopy (EIS) with distribution of relaxation times (DRT), while SEI composition was probed through infrared (IR) and X-ray photoelectron spectroscopy (XPS). The study demonstrates that precise ES and vinylene carbonate (VC) dosing critically modulates SEI chemistry, influencing reduction pathways of LiFSI, acetonitrile, and carbonate solvents, directly correlating with low-temperature power performance.

Ethylene Sulfite for the Green and Continuous Oxidation to Ethylene Sulfate (DTD) in Lithium-Ion Battery Applications

Li H, et al. Applied Catalysis A: General, 2025, 708, 120581.

A continuous and heterogeneous method for oxidizing ethylene sulfite (ES) to ethylene sulfate (DTD) was developed using Titanium Silicalite-1 (TS-1) as the catalyst and H₂O₂ as a green oxidant. The tetra-coordinated Ti sites in TS-1 activate H₂O₂ to form Ti-OOH intermediates, which selectively oxidize ES. Under optimized conditions, DTD yields exceeded 92 %, while the TS-1 catalyst maintained activity for over 300 h. This continuous-flow setup eliminates Cl-containing wastes associated with conventional RuCl₃/NaClO routes, offering a cost-effective and environmentally friendly approach. The methodology demonstrates direct experimental applicability in forming SEI additives for lithium-ion batteries.

Ethylene Sulfite for Electrolyte Development in Non-Aqueous Lithium-Oxygen Batteries

Wu C, et al. Chinese Chemical Letters, 2016, 27(9), 1485-1489.

In the development of high-performance non-aqueous lithium-oxygen (Li-O₂) batteries, ethylene sulfite (ES) has been explored as a novel electrolyte solvent to address stability challenges commonly associated with traditional electrolytes. In the reported experimental setup, ES was employed directly as the solvent for the lithium salt, forming the electrolyte solution without additional co-solvents. Electrochemical evaluation was conducted in a standard Li-O₂ cell configuration, comprising a lithium metal anode, a carbon-based air electrode, and the ES-based electrolyte. The performance metrics, including specific capacity, round-trip efficiency, and cycling stability, were systematically assessed through galvanostatic discharge/charge tests under ambient oxygen. Notably, the Li-O₂ cells demonstrated high reversible capacity and prolonged cycle life without the incorporation of catalytic additives, highlighting the intrinsic electrochemical stability of ES. Volatility measurements and linear sweep voltammetry further confirmed ES's low vapor pressure and wide electrochemical window, underscoring its suitability for practical Li-O₂ battery applications. This study experimentally validates ES as a stable, high-performance solvent, providing a practical pathway for enhancing non-aqueous Li-O₂ battery efficiency and durability.