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Poly-DADMAC Storage — Cationic Polymer Coagulant Tank Selection

Storing PolyDADMAC? Start Here

PolyDADMAC is a common cationic coagulant used in water treatment, wastewater management, and various industrial processes. It helps in clarifying water by neutralizing charges and forming flocs, making it easier to remove impurities. This chemical is typically stored as a straw-yellow, viscous liquid, and it's important to handle it properly to maintain its effectiveness.

Can you store it in a poly tank?

Yes, you can store PolyDADMAC in polyethylene tanks. High-density polyethylene (HDPE) or cross-linked polyethylene (XLPE) tanks are standard for this purpose, as the chemical does not attack these materials.

Viscosity Management

PolyDADMAC solutions can be quite viscous, especially at higher concentrations. This means you'll need to carefully design your pumping and piping systems to handle the thickness without degrading the polymer. Consider using larger diameter pipes and low-shear mixers to maintain the quality of the chemical.

The safety that actually matters

  • Ensure tanks are made from compatible materials like HDPE or XLPE.
  • Use EPDM gaskets for sealing to prevent leaks.
  • Implement low-shear mixing to avoid damaging the polymer.

Common questions

What is the best material for storing PolyDADMAC?
HDPE or XLPE tanks are recommended for storing PolyDADMAC.
Can PolyDADMAC be used in drinking water treatment?
Yes, it is commonly used in municipal water treatment for clarifying drinking water.
How should I handle the viscosity of PolyDADMAC?
Use larger pipes and low-shear mixers to manage its high viscosity effectively.

Poly-DADMAC storage tanks from OneSource

For poly-dadmac 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.

Designing the storage system, not just picking a tank?

Vendor-neutral engineering guides from our custom fabrication team - material of construction, containment, and code, matched to your chemistry.

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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 Polydadmac. cdc.gov/niosh/npg. CDC / NIOSH chemical-specific occupational-safety reference.

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