Dimethyl sulfoxide (DMSO) is a widely used chemical compound that has a number of practical applications, including:

1. Industrial Uses: DMSO is a powerful solvent that is used in various industrial processes, such as pharmaceutical manufacturing, polymer production, and electronics manufacturing.

2. Laboratory Research: DMSO is commonly used in laboratories as a solvent for chemical reactions and for storing and dissolving compounds.

3. Medical Applications: DMSO has been used for medical purposes, such as a topical analgesic and anti-inflammatory agent. It is sometimes used to treat conditions like interstitial cystitis, a chronic bladder condition.

4. Cryopreservation: DMSO is used as a cryoprotectant for preserving biological samples, tissues, and cells at low temperatures. It helps prevent ice crystal formation, which can damage cells during freezing and thawing.

5. Drug Delivery: DMSO can enhance the permeability of cell membranes, which makes it useful in drug delivery systems to improve the absorption of certain medications through the skin.

6. Cosmetics: DMSO is used in some cosmetic products for its ability to enhance the absorption of other ingredients into the skin.

7. Veterinary Medicine: DMSO is used in some veterinary medicines for its anti-inflammatory and analgesic properties.

Despite its many uses, it's important to note that DMSO should be handled carefully and used with caution due to its ability to penetrate the skin rapidly, potentially carrying other substances with it.