2,4-D Storage — Phenoxy Herbicide Tank Selection (Amine + Ester)

Storing 2,4-D Herbicide? It Depends on the Formulation

2,4-D is a high-volume broadleaf herbicide, and the right tank depends on which formulation you have. The amine-salt (water-based) version stores great in a poly tank. The ester (emulsifiable concentrate) version carries a hydrocarbon solvent that's harder on seals — same poly tank, but solvent-resistant gaskets.

Can you store it in a poly tank? Yes — both, with the right gaskets.

• Amine salt (water-based, ~46%): mildly alkaline; fully compatible with HDPE/XLPE, EPDM gaskets. Big ag dealers run 6,000–15,000-gallon HDPE tanks on it.
• Ester concentrate: the solvent in it swells EPDM — use Viton seals instead. The poly tank itself is still fine.

It corrodes mild steel and aluminum, so keep hardware non-metallic or compatible.

The safety that actually matters

• Match gaskets to your formulation — EPDM for amine salt, Viton for ester.
• Restricted herbicide — licensed handling, PPE, and 110% containment.

Common questions

Poly tank for 2,4-D bulk?

Yes — HDPE is the ag-dealer standard. Use EPDM gaskets for amine-salt, Viton for ester concentrate.

Why do my seals swell?

You likely have the ester formulation — its solvent swells EPDM. Switch to Viton.