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Hexamethylenetetramine Storage — HMTA / Hexamine Tank Selection

Storing Hexamethylenetetramine? Start Here

Hexamethylenetetramine, also known as hexamine, is a versatile chemical used in resin curing, foundry processes, and as a pickling inhibitor. It's typically supplied as a white crystalline solid and can be dissolved in water for various applications. When storing hexamine, it's important to consider its mild alkalinity and potential to release formaldehyde and ammonia under certain conditions. This guide will help you choose the right storage solution for your needs.

Can you store it in a poly tank?

Yes, you can store hexamethylenetetramine in a polyethylene (poly) tank. HDPE or XLPE tanks are standard for storing the 30-50% aqueous solutions of hexamine. These materials handle the mild alkalinity well and are cost-effective for most storage needs. For high-temperature applications, especially in phenolic-resin curing, 316L stainless steel is recommended.

Key Issue: Hydrolysis Concerns

The primary concern with hexamine storage is its tendency to hydrolyze into formaldehyde and ammonia, especially in acidic or high-temperature conditions. This reaction can affect material compatibility and safety, so it's crucial to monitor storage conditions and use appropriate materials for your specific application.

The safety that actually matters

  • Ensure proper ventilation to manage dust and fumes.
  • Use appropriate personal protective equipment (PPE) when handling.
  • Monitor storage conditions to prevent unwanted hydrolysis reactions.

Common questions

What materials are best for hexamine storage tanks?
HDPE or XLPE tanks with polypropylene fittings and EPDM gaskets are standard for aqueous solutions. For high-temperature applications, consider 316L stainless steel.
Can hexamine solutions corrode metal tanks?
Hexamine solutions are mildly alkaline and generally safe for most metals, but prolonged exposure to the hydrolysis products can affect some metals like aluminum.
Is hexamine flammable?
Yes, hexamine is a flammable solid. Ensure proper storage and handling to prevent fire hazards.

Hexamethylenetetramine storage tanks from OneSource

For hexamethylenetetramine storage, specify HDLPE_OR_XLPE rated to specific gravity 1.9. Verified, compatibility-matched options:

Confirm chemical compatibility and a ZIP freight quote with our team at 866-418-1777.

Caustic or alkaline service: pick a polymer or FRP that lasts.

Strong bases stress-crack the wrong materials. These guides cover the material-of-construction call for caustic and alkaline storage.

Explore: FRP & Fiberglass Tanks  ·  Double Wall Tanks  ·  Chemical Compatibility

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. PubChem Compound Database — entry for Hexamethylenetetramine (CID 4101, CAS 100-97-0). pubchem.ncbi.nlm.nih.gov. National Library of Medicine / NCBI. Canonical chemical-identity reference.
  2. 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.
  3. 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.
  4. 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).
  5. 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.
  6. 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.
  7. NIOSH Pocket Guide to Chemical Hazards — occupational exposure limits, PPE, and IDLH data for Hexamethylenetetramine. cdc.gov/niosh/npg. CDC / NIOSH chemical-specific occupational-safety reference.

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