Molekula
Sulfolane (Tetramethylene sulfone)
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Sulfolane (Tetramethylene sulfone) is a high-boiling, polar organic solvent widely used in industrial processes like natural gas sweetening, aromatic extraction, and lithium battery production. It’s a stable, non-flammable liquid with strong solvency for polar and non-polar compounds. This chemical has a CAS number of 126-33-0, molecular formula C4H8O2S, and a molecular weight of 120.17 g/mol. It is stored at ambient conditions but carries a Danger signal word due to its classification as a reproductive toxicant (H360FD), and it is also harmful if swallowed (H302) and may cause organ damage through prolonged or repeated exposure (H373). Molekula supplies Sulfolane from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
-
100 g — £30.90 per pack ex VAT · £37.08 inc. VAT
-
1 kg — £77.90 per pack ex VAT · £93.48 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Colourless to light yellow liquid |
| Water | ≤ 0.5% |
| Purity | ≥ 99% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 165 °C |
| Acidity | Base |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White or creamy white, crystalline powder |
| Odour | Odorless |
| Melting Point | 27.4-27.8 °C |
| Boiling Point | 285 °C |
| Solubility (other solvents) | Freely soluble in alcohol, soluble in dilute mineral acids |
| Vapour Pressure | 0.0062 mmHg at 27.6 °C (Extrapolated) |
| Refractive Index | 1.481 |
| log P (octanol/water) | -0.77 |
Source: PubChem CID 31347 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 80555813 |
| CAS Number | 126-33-0 |
| IUPAC Name | thiolane 1,1-dioxide |
| EC Number | 204-783-1 |
| Molecular Formula | C4H8O2S |
| Molecular Weight | 120.17 |
| Exact Mass | 120.0245 |
| SMILES | C1CCS(=O)(=O)C1 |
| InChIKey | HXJUTPCZVOIRIF-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H8O2S/c5-7(6)3-1-2-4-7/h1-4H2 |
| PubChem CID | 31347 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2934.99.90.01 |
| Tariff Code | 2934999066 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H302 Harmful if swallowed
- H360FD May damage fertility. May damage the unborn child.
- H373 May cause damage to organs through prolonged or repeated exposure
Precautionary statements
- P201 Obtain special instructions before use
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P302+352 IF ON SKIN: Wash with soap and water
- P304+340 IF INHALED: Remove victim to fresh air and keep at rest in a position comfortable for breathing
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 1,1-Dioxothiolan
- Sulfalone
- Sulfolan
- SULFOLANE
- Sulpholane
- Sulphoxaline
- Tetrahydrothiophene 1,1-dioxide
- Tetramethylene sulfone
- thiolane 1,1-dioxide
- Thiophene, tetrahydro-, 1,1-dioxide
Frequently asked questions
What is sulfolane (tetramethylene sulfone) commonly used for?
Sulfolane is primarily used as a high-boiling-point solvent in industrial processes, including natural gas treating, petroleum refining, and as a selective solvent for aromatic extraction.
What is the chemical formula and molecular weight of sulfolane?
The chemical formula is C₄H₈O₂S, and the molecular weight is 120.17 g/mol.
What safety classification does sulfolane fall under, and how should it be handled?
Sulfolane is marked with the signal word 'Danger' due to its hazardous properties; handle with appropriate PPE and ventilation to avoid exposure.
What grades of sulfolane does Molekula supply, and is it suitable for pharmaceutical or food applications?
Molekula supplies industrial-grade sulfolane; it is not typically used in pharmaceutical or food applications due to its toxicity and regulatory restrictions.
Can Molekula supply sulfolane in bulk quantities for large-scale industrial use?
Yes, Molekula can provide sulfolane in bulk, with quantities tailored to meet industrial and commercial needs—please contact us for specific packaging options.
What documentation is provided with a sulfolane order?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a product specification sheet to ensure compliance and safety.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.