Description
Dimethyl Sulfoxide 99.9% (DMSO)
Dimethyl Sulfoxide 99.9% (DMSO) (CAS 67-68-5, molecular formula C2H6OS) is a process chemical for electronics and metal finishing, where trace metal content and particle contamination matter as much as headline assay. China Chemicals supplies it at 99.9% min in pack sizes from 1 L through to 200 L Drum, so laboratory trial quantities and full production volumes can be sourced from the same specification.
It is also traded as DMSO, Methylsulfinylmethane, Sulfinylbismethane. Every consignment ships with a batch-specific Certificate of Analysis and the current Safety Data Sheet, and material is stored and picked under stock rotation so you receive product well inside its shelf life.
Typical applications
- Photoresist and polyimide stripping
- Reaction solvent in fine chemical synthesis
- Spinning solvent for acrylic and polysulphone fibre
- Cryoprotectant in cell preservation at pharma grade
- Paint stripper component in low-VOC systems
Technical specification
| Chemical name | Dimethyl Sulfoxide 99.9% (DMSO) |
|---|---|
| Synonyms | DMSO, Methylsulfinylmethane, Sulfinylbismethane |
| CAS number | 67-68-5 |
| Molecular formula | C2H6OS |
| Appearance | Clear colourless hygroscopic liquid |
| Purity | 99.9% min |
| Water | 0.05% max |
| Acidity as H2SO4 | 0.003% max |
| Colour (APHA) | 20 max |
| Density at 20°C | 1.100 – 1.104 g/cm³ |
| Freezing point | 18.4°C |
Values above are typical and are confirmed on the Certificate of Analysis issued against each batch. Tighter specifications can be quoted where a process requires them.
Packaging and supply
Available in 1 L, 5 L, 25 L, 200 L Drum. Bulk, road tanker and export drum quantities are quoted on request, including FOB and CIF terms for international shipment. Pricing shown is per pack in USD, exclusive of freight and any applicable duties.
Handling and safety
Transport classification: Not regulated · Not classified as hazardous. Store in the original closed container in a cool, well-ventilated area away from incompatible materials, and handle using appropriate personal protective equipment. Read the Safety Data Sheet in full before use — it is issued with every order and is available on request before purchase.
Supply to industry only. Products are sold for legitimate industrial, laboratory and manufacturing use. We may request end-use details and business registration before releasing an order.
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