Sulfolane CAS 126-33-0

Product name: Sulfolane
English alias: Tetrahydrothiophene sulfone; Tetramethylene sulfone; Thiocyclopentane-1,1-dioxide.
CAS: 126-33-0
Molecular formula: C₄H₈O₂S
Appearance: Colorless transparent liquid
Package: 25kg/drum, 200kg/drum

What is Sulfolane？

Sulfolane is a highly polar aprotic solvent with exceptional chemical and thermal stability. It is widely recognized for its outstanding solvency power towards a variety of organic and inorganic compounds, aromatics, and acid gases. Its high boiling point and low vapor pressure make it an ideal solvent for high-temperature processes. Sulfolane is also known by its chemical name, Tetrahydrothiophene-1,1-dioxide. It is a key component in many industrial applications, from gas treatment and extraction processes to polymer and electronics manufacturing.

COA:

Appearance	colorless to light yellowish	Qualified
Purity(dry basis)   % m/m	≥99.5	99.71
Density (30℃) kg/m3	1260-1270	1263
5% Distil off temperature  ℃	≥282	285.2
95% Distil off temperature  ℃	≤288	285.7

Application:

1.Gas Treatment:

Primarily used as a solvent in the Sulfinol® process for removing hydrogen sulfide (H₂S) and carbon dioxide (CO₂) from natural gas and refinery streams.

2.Extraction Solvent:

Excellent solvent for the extraction of aromatic hydrocarbons (like benzene, toluene, xylene) from hydrocarbon mixtures in refineries.

3.Polymer & Plastic Industry:

Used as a solvent for polymerization reactions and as a plasticizer for engineering plastics.

4.Electronics Industry:

Serves as a high-purity solvent for photoresist stripping and cleaning agents in semiconductor and display manufacturing.

5.Chemical Synthesis:

Acts as a reaction medium and solvent in various organic synthesis processes due to its high stability and solvency.

6.Coating & Adhesive Industry:

Used as a formulation component to enhance solubility and performance.

Safety profile:

Sulfolane is generally considered to have low acute toxicity. However, prolonged or repeated skin contact may cause irritation and dermatitis. It has shown potential reproductive and developmental effects in animal studies under high exposure conditions. Appropriate personal protective equipment (PPE) including gloves and safety glasses is recommended during handling. Ensure adequate ventilation in the work area.

Storage requirements:

Store in a cool, dry, well-ventilated area away from heat and ignition sources.
Keep container tightly closed.
Protect from moisture and physical damage.

Transport & Packaging:

Sulfolane is typically supplied in 25 kg polyethylene drums or 200 kg polyethylene drums.
It can also be transported in isotanks or IBCs (Intermediate Bulk Containers) for large quantities.
Classified as not dangerous for transport according to most international regulations (non-hazardous cargo), but always check local regulations.