DioxanWasser

DioxanWasser is a term used in some German-language scientific contexts to describe an aqueous solution in which 1,4-dioxane is the principal organic solvent. It is not a distinct compound with a fixed chemical formula, but rather a miscible solvent system whose properties depend on the proportion of water to dioxane.

Physically, a DioxanWasser solution is typically a clear, colorless liquid. 1,4-dioxane is miscible with water and many organic solvents, and the properties of the mixture—such as density, boiling behavior, and solvent power—vary with composition. The presence of water lowers the effective volatility of the solvent, while the overall solution remains flammable and should be handled with appropriate caution. Dioxane itself can form peroxides upon prolonged storage in air, so fresh or stabilized solutions are preferred in laboratory practice.

Uses and applications commonly involve serving as a versatile solvent for organic synthesis, polymerization, purification, and analytical procedures. Dioxane-based systems can dissolve a wide range of hydrophobic compounds and are sometimes employed in chromatography, extraction, and cleaning processes. In many laboratories, DioxanWasser is chosen for its ability to stabilize certain reaction intermediates or to enable miscible phase behavior between aqueous and organic layers.

Hazards and safety considerations are significant. 1,4-dioxane is classified as a probable human carcinogen by several agencies, and exposure can irritate the eyes, skin, and respiratory tract. It is highly soluble in water and can contaminate groundwater, so usage is typically accompanied by engineering controls (fume hoods), personal protective equipment, and proper waste handling. Environmental and regulatory guidelines vary by country.

See also: 1,4-dioxane, solvent safety, organic solvents.