1,4-Dioxane

English name: 1,4-Dioxane

Synonyms: Dioxane, Di-Ethylen-Ether, Di-Ethylen-Dioxide

Chemical formula: _C4H8O2

Molar mass: 88.11 g/mol

CAS number: 123-91-1

EC number: 204-661-8

Technical specifications

• Form: colorless liquid
• Odor: aromatic
• pH value (500 g/l, 20°C): 6-8
• Melting point: 11.8°C
• Boiling point: 101.3°C
• Auto-ignition temperature: 180°C
• Flash point: 11°C
• Explosion limits: 1.9-22.5% vol.
• Vapor pressure (20°C): 41 mbar
• Density (20°C): 1.03 g/cm³
• Viscosity (20°C): 1.32 mPa-s
• Refractive index (20°C): 1.42241
• Critical temperature: 314°C
• Critical pressure: 5.2 MPa
• Solubility in water: complete
• Solubility in organic solvents: very good
• log_Pow: 0,42

Examples of applications in various industries

• Solvent in analytical and organic laboratories
• Component of extraction mixtures
• Reaction in organic synthesis

Hazard statements (H)

• H225 - Highly flammable liquid and vapor
• H319 - Causes serious eye irritation
• H335 - May cause respiratory irritation
• H351 - Suspected of causing cancer
• EUH019 - May form explosive peroxides
• EUH066 - Repeated exposure may cause skin dryness or cracking

Precautionary statements (P)

• P210 - Keep away from heat/sparks/open flames
• P223 - Avoid contact with water
• P281 - Wear required protective equipment
• P305+351+338 - If in eyes: rinse cautiously with water
• P308+313 - In case of exposure or suspected exposure: seek medical advice
• P403+235 - Store in a well-ventilated place at low temperature

Restrictions

The product is intended for laboratory and analytical purposes only. Do not use for food, pharmaceutical, or cosmetic purposes.

Recommended storage conditions

Store in a cool, well-ventilated area, away from fire and light sources. Storage in tightly sealed dark glass containers is recommended. Due to the possibility of peroxide formation, the peroxide content should be checked regularly.

Quality data (CHEM-112923007)

• Density (20°C): 1.032-1.034 g/cm³
• Crystallization temperature: min. 11°C
• Refractive index (20°C): 1.420-1.424
• Water: max. 0.2%
• Free acids (i.e. _CH3COOH): max. 0.005%.
• Acetal: max. 0.5%.
• Peroxides _{(H2O2 ions}): max. 0.005%.
• Residue after evaporation: max. 0.005%.