What Is Diglyme?
Diglyme, officially known as bis(2-methoxyethyl)ether or diethyleneglycol dimethyl ether, is an organic compound with the formula C6H14O3. It is a clear, colorless liquid at room temperature with a peculiar smell, recognized by its CAS number 111-96-6. The structure consists of two methoxyethyl groups linked by an ether bond, derived from diethyleneglycol methylation.
Uses of Diglyme
Primarily used as a solvent, diglyme’s high boiling point and chelating ability make it suitable for chemical reactions involving metal compounds, such as Grignard reagents and metal hydrides, enhancing reaction rates. Additionally, it serves as a solvent for photoresists and in the manufacturing of integrated circuit boards, particularly for coating silicon wafers in semiconductor production.
Properties of Diglyme
With a molecular weight of 134.17, diglyme has a melting point of -64°C and a boiling point of 162°C. It is basic, stable under heat with strong bases, and has a density of 0.937 g/mL. Notable for its high flammability, it has a low flash point of 57°C and is miscible with water, alcohols, and diethyl ether.
Types of Diglyme
Available mainly for research and development, diglyme is sold in volumes ranging from 25mL to 2L, accommodating both small-scale laboratory needs and larger applications. It is marketed under various names, including its chemical names, and is typically stored at room temperature.
Other Information on Diglyme
1. Synthesis of Diglyme
Synthesis involves reacting dimethyl ether with ethylene oxide, catalyzed by an acid.
2. Reactivity of Diglyme
While stable under typical conditions, diglyme can form explosive peroxides at temperatures exceeding 51°C and react violently with strong oxidizers, necessitating careful storage and handling.
3. Safety Information on Diglyme
Notable hazards include its flammability and potential to cause eye irritation and reproductive harm. Safety measures include avoiding ignition sources, maintaining proper ventilation, and wearing protective gear. Eye exposure requires immediate rinsing and medical consultation if irritation persists.
4. Regulatory Information on Diglyme
Its flammability and health risks subject diglyme to strict regulatory oversight. Classified under various safety laws, appropriate compliance measures are essential for safe handling and storage.