Description

Sulfolane (CAS NO 126-33-0) is a high-performance, polar aprotic solvent with exceptional thermal and chemical stability. Its unique combination of properties makes it a critical processing aid in demanding industrial separations and high-value chemical syntheses. This versatile compound is essential for manufacturers in the petrochemical, natural gas, and pharmaceutical sectors seeking efficient and reliable solvent solutions.

Application

• Gas Sweetening (Sulfur Removal): Primarily used as a physical solvent in the Sulfinol® process and other technologies to selectively remove hydrogen sulfide (H₂S) and carbon dioxide (CO₂) from natural gas and refinery streams.
• Extractive Distillation: Serves as a selective solvent for separating close-boiling aromatic hydrocarbons (like benzene, toluene, xylene) from aliphatic mixtures in petrochemical operations.
• Chemical Synthesis: Acts as a high-boiling, stable reaction medium for polymerization, alkylation, and other processes where a polar, inert solvent is required.
• Electrolyte Component: Used in specialized lithium-ion battery electrolytes to enhance stability and performance at high voltages.
• Plasticizer & Polymer Processing: Employed as a plasticizer for engineering plastics and as a solvent in the production of polysulfone and polyethersulfone membranes.
• Industrial Cleaning Formulations: Incorporated into precision cleaning agents for electronics and metals due to its solvating power and low volatility.

Basic Information

Product Name	Sulfolane
CAS No.	126-33-0
Molecular Formula	C₄H₈O₂S
Molecular Weight	120.17 g/mol
Synonyms	Tetrahydrothiophene 1,1-dioxide; Thiocyclopentane 1,1-dioxide; Tetramethylene sulfone; Sulfolane W; Sulfolan; Thiophane dioxide; Sulfocyclopentane; NSC 7192
EINECS	204-783-1

Quality Control

Our Sulfolane is manufactured under a stringent quality management system to ensure batch-to-batch consistency and reliability for critical industrial processes. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing key parameters such as purity, water content, and acidity. Our quality protocols are designed to meet the rigorous demands of the gas processing and specialty chemical industries.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong oxidizing agents. The recommended storage temperature is between 15°C and 25°C. Sulfolane is hygroscopic; containers should be kept tightly sealed to prevent moisture absorption.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 99.0 %
Water Content (KF)	≤ 0.1 %
Refractive Index (n20D)	1.480 - 1.483
Density (20°C)	1.260 - 1.265 g/mL
Acidity (as H₂SO₄)	≤ 0.01 %
Boiling Point	~285 °C
Flash Point (PMCC)	> 165 °C

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.