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Ethylene glycol is an organic compound with the formula (CH???OH)???. It is mainly used for two purposes, as a raw material in the manufacture of polyester fibers and for antifreeze formulations. It is an odorless, colorless, sweet-tasting, toxic, viscous liquid.??

Diethylene glycol (DEG) is an organic compound with the chemical formula (HOCH₂CH₂)₂O. It is a colorless, practically odorless, and hygroscopic liquid with a sweetish taste. DEG is miscible in water, alcohol, ether, acetone, and ethylene glycol.

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Physical Properties:

• Density: 1.118 g/mL
• Melting Point: −10.45 °C
• Boiling Point: 244 to 245 °C

Production:

DEG is produced by the partial hydrolysis of ethylene oxide, resulting in a mixture that includes DEG and related glycols.

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Uses:

• Solvent: DEG is widely used as a solvent for nitrocellulose, resins, dyes, oils, and other organic compounds. Wikipedia
• Humectant: It serves as a humectant in tobacco, cork, printing ink, and glue.
• Chemical Intermediate: DEG is a precursor in the synthesis of compounds like morpholine and 1,4-dioxane.
• Desiccant: It is used in natural gas processing to absorb water, minimizing the formation of methane hydrates that can block pipes.

Safety Considerations:

While DEG has various industrial applications, it is important to note that it is toxic to both humans and animals. Ingestion can lead to severe health issues, including kidney and liver damage, and can be fatal. Symptoms of poisoning may include vomiting, diarrhea, and abdominal pain, potentially progressing to acute renal failure. Proper handling and storage are essential to prevent accidental ingestion.

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CAS Number:

Diethylene glycol has the CAS number 111-46-6.

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In summary, diethylene glycol is a versatile compound used in various industrial applications, but its toxicity necessitates careful handling and adherence to safety guidelines.