Home › Chemicals › 1,4-Dioxane CAS 123-91-1: 1,4-Dioxane (C4H8O2) Identity CAS Number 123-91-1 Molecular Formula C4H8O2 IUPAC Name 1,4-dioxane Molecular Weight 88.11 g/mol SMILES C1COCCO1Synonyms dioxane, p-dioxane, diethylene dioxide
2D Structure
Physical Properties Density 1.033 g/mL at 25°C Boiling Point 101.1°C Melting Point 11.8°C Flash Point 12.0°C Vapor Pressure 3.7 kPa at 20°C Refractive Index nD = 1.422 Dielectric Constant ε = 2.2
Safety & GHS Classification Flammable Irritant Health Hazard
H225: Highly flammable liquid and vapor H319: Causes serious eye irritation H335: May cause respiratory irritation H351: Suspected of causing cancer H370: Causes damage to organs (kidneys, respiratory system) Storage: Store in cool, well-ventilated area. Forms explosive peroxides — test before distillation. Suspected carcinogen. Use in fume hood with proper PPE. Keep away from ignition sources.
Material Compatibility Matrix Plastics Material Rating PTFE Excellent PVC Poor PE Good PP Good PEEK Excellent PVDF Good
Rubbers Material Rating Viton Good NBR Poor EPDM Good Silicone Fair FKM Good
Metals Material Rating Stainless 316 Excellent Aluminum Good Copper Good Brass Good
Applications Laboratory solvent (chromatography) Cellulose acetate solvent Degreasing agent Pharmaceutical manufacturing Adhesive manufacturing Corrosion inhibitor Emulsion stabilizer External References: PubChem
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