CAS 67-68-5 Dimethyl Sulfoxide (DMSO), also known by its chemical name Methyl Sulfoxide and its registry number CAS 67-68-5, is one of the most widely used organic sulfur compounds in global chemical and industrial applications. With excellent solvency,low toxicity, high polarity, strong permeability, and exceptional stability, DMSO plays an irreplaceable role in pharmaceuticals, agrochemicals, electronics, petrochemicals, polymer materials, coatings, and many other industries.
Typical Grade Specifications
| Grade | Assay (GC) | Water (KF) | Color (APHA) | Acidity (as AcOH) | Non-volatile residue | Notes |
| Industrial | ≥ 99.5% | ≤ 0.20% | ≤ 20 | ≤ 0.03% | ≤ 0.02% | General industrial uses |
| High Purity / General | ≥ 99.9% | ≤ 0.05% | ≤ 10 | ≤ 0.02% | ≤ 0.005% | Fine chemicals, R&D |
| Anhydrous / Extra Dry | ≥ 99.9% | ≤ 0.01% (100 ppm) | ≤ 10 | ≤ 0.02% | ≤ 0.005% | Moisture-critical syntheses |
| Electronic / Low-metal (indicative) | ≥ 99.9% | ≤ 0.02% (200 ppm) | ≤ 10 | ≤ 0.02% | ≤ 0.005% | Metals each typically ≤ 0.1–1 ppm; supplier-specific |
The Versatile Industrial Applications Of Dimethyl Sulfoxide DMSO CAS 67-68-5
The King of industrial solvents
Polymer materials:
Dimethyl Sulfoxide can effectively dissolve polymers such as polyacrylonitrile and polyurethane. In synthetic fiber spinning, this solubility helps convert polymer raw materials into uniform spinning solutions, ensuring the smooth production of high-quality fibers. It is also widely used in resin processing, as it can adjust the viscosity of resin systems, making resin processing and molding more convenient.
Coatings and paints:
In the field of coatings and paints, DMSO is a practical additive. It can significantly improve the leveling property of coatings, enabling the paint to spread evenly on the surface and reducing surface defects like brush marks. At the same time, it enhances the dispersion effect of pigments in the coating system, ensuring the color and luster of the final paint film are consistent.
In the electronics industry
Dimethyl Sulfoxide DMSO is widely applied in the electronics industry, especially in the manufacturing of semiconductors and PCBs. It serves as a high-performance solvent for photoresists, which are key materials in semiconductor photolithography.
Extraction and separation:
In extraction and separation processes, DMSO shows excellent efficiency. It is commonly used for extracting valuable substances such as drugs, fragrances and natural products.
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