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1,4-Dioxane Storage — Cyclic Ether Solvent Tank Selection

Storing 1,4-Dioxane? Poly Is Only for the Short Term

Honest answer up front: 1,4-dioxane is an aggressive ether solvent, and polyethylene is not a long-term storage material for it. Poly slowly swells and lets the solvent permeate. For bulk or long-term storage you want stainless steel or a fluoropolymer-lined tank. Poly is fine only for short-term, dilute, or transfer service.

Can you store it in a poly tank? Short-term/dilute only.

  • Anhydrous (neat) dioxane: poly is not recommended — slow swelling and permeation. Use stainless or PTFE/PVDF-lined.
  • Dilute aqueous (10–50%): poly is acceptable for limited/short-term holding.

If you need long-term bulk storage, this is a stainless or fluoropolymer job — not a polyethylene tank. Gaskets must be PTFE/fluoropolymer; never EPDM (it swells severely in dioxane).

The safety that actually matters

  • Highly flammable (flash point ~54°F) and a suspected carcinogen — this is a serious-handling chemical.
  • Vapor sinks and pools in pits, sumps, and low tank rooms — explosion-proof ventilation and confined-space precautions.
  • Keep ignition sources away; ground and bond transfer equipment.

Common questions

Can I store dioxane in a poly tank long-term?
No — it swells and permeates polyethylene. Long-term/bulk needs stainless or a fluoropolymer-lined tank. Poly only for short-term dilute service.
What gaskets?
PTFE/fluoropolymer. Never EPDM — dioxane swells it severely.
How dangerous is it?
Very — highly flammable and a suspected carcinogen, with vapor that pools low. Full controls required.

Need a tank for this chemical?

Our team will confirm the right material and a freight quote to your ZIP. Call 866-418-1777 or browse the chemical compatibility database.

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Sources & References

All compatibility ratings, hazard classifications, and chemical identifiers on this page are sourced from authoritative third-party publications. Verify against the original references before final specification.

  1. Snyder Industries Chemical Resistance Recommendations — system-of-construction guidance for polyethylene chemical-storage tanks at industrial ASTM 1.9 SG design rating. SNY-3041 Chemical Resistance Chart. Snyder Industries, current edition. Resin + fitting + gasket + bolt MOC matrix.
  2. Equistar Technical Tip — Chemical Resistance of Polyethylene — LDPE / MDPE / HDPE rating chart by concentration and temperature, distributed by Enduraplas. enduraplas.com (PDF). Equistar polyethylene resin chemical-resistance data, distributed via Enduraplas.
  3. NFPA 704: Standard System for the Identification of the Hazards of Materials for Emergency Response. nfpa.org. NFPA 704 'fire diamond' health/flammability/instability/special-hazard rating system (0–4 scale).
  4. UN Globally Harmonized System of Classification and Labelling of Chemicals (GHS), current revision. unece.org/transport/ghs. GHS pictograms, signal words, and H-statement codes referenced in this guide.
  5. ASTM D1998 — Standard Specification for Polyethylene Upright Storage Tanks, current edition. astm.org. Cited as the design-specific-gravity standard (typically 1.9 SG) for industrial chemical-service polyethylene tanks.
  6. NIOSH Pocket Guide to Chemical Hazards — occupational exposure limits, PPE, and IDLH data for 1 4 Dioxane. cdc.gov/niosh/npg. CDC / NIOSH chemical-specific occupational-safety reference.

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