Atrazine Storage & Tank Compatibility

Storing Atrazine? Start Here

Atrazine (C₈H₁₄ClN₅, CAS 1912-24-9) is one of the most widely used selective triazine herbicides, applied for pre- and early post-emergence broadleaf and grassy weed control in corn, sorghum, sugarcane, and turf. The technical material is a colorless-to-white crystalline solid that melts near 173–175°C, decomposes rather than boils, and is essentially non-volatile and only slightly soluble in water. In commerce it is sold and stored as aqueous wettable powders, flowable suspensions, and liquid (4L-type) concentrates rather than as the neat solid.

Because the working product is a water-based or mild-solvent agrochemical formulation that is non-oxidizing and chemically stable at ambient conditions, it is well suited to chemical-service polyethylene storage. The chief handling concerns are aquatic toxicity, skin sensitization, and avoiding heat that drives off corrosive decomposition fumes (hydrogen chloride and nitrogen oxides). Match the tank rating to the formulation specific gravity and verify against the product SDS.

Polyethylene (HDPE / XLPE) Compatibility — Honest Assessment

Atrazine is compatible with HDPE and crosslinked (XLPE) polyethylene. It is a non-oxidizing, chemically stable triazine handled almost exclusively as aqueous wettable powders, flowable suspensions, and liquid concentrates — exactly the class of mild aqueous agrochemical media that polyethylene resistance charts rate as having little or no attack at both 20°C and 50°C. Liquid herbicide concentrates of this type are routinely stored and metered from HDPE and XLPE tanks across agriculture.

Specify a chemical-service poly tank rated to the actual formulation specific gravity (1.5 SG and 1.9 SG ratings cover essentially all field-strength herbicide loads). One caveat: some liquid (4L-type) formulations contain organic carrier solvents — review that product's SDS, because heavily solvent-borne blends can call for stainless steel, lined steel, or FRP and may add a flammability consideration the neat herbicide does not have.

Material compatibility at a glance

Atrazine is a non-oxidizing triazine herbicide handled as aqueous wettable powders, flowable suspensions, and liquid concentrates. Chemical-service HDPE and XLPE are the standard, cost-effective choice for storage and mixing; stainless steel, FRP, and polypropylene are equally suitable. Specify the poly tank to the formulation specific gravity and confirm against the exact product SDS, since liquid (4L-type) formulations carry organic solvents that can change material and ignition requirements.

Ratings: S suitable · C conditional / limited · U unsuitable. Verify against the cited resistance charts and your concentration/temperature before specifying.

The safety that actually matters

• Very toxic to aquatic life with long-lasting effects (H400/H410) — provide secondary containment and prevent any release to drains, soil, surface water, or groundwater.
• Harmful if swallowed (H302) and may be harmful if inhaled (H333) — avoid dust and mist; use eye protection and chemical-resistant gloves.
• Skin sensitizer (H317) and eye irritant (H319/H320) — repeated skin contact can trigger an allergic reaction.
• Suspected reproductive/developmental hazard (H361) and may cause organ damage (H371, H373) — minimize prolonged and repeated exposure.
• Thermal decomposition releases corrosive and toxic fumes including hydrogen chloride and nitrogen oxides — keep away from heat and open flame; do not store hot.
• Regulated pesticide — store, label, and dispose per the product label and applicable pesticide regulations; keep the SDS at the tank.

Common questions

Can atrazine be stored in a polyethylene tank?

Yes. Atrazine herbicide formulations are compatible with HDPE and XLPE, which are the standard, cost-effective choice for storing and mixing liquid herbicide concentrates. Choose a chemical-service poly tank rated to the formulation specific gravity, and confirm against the SDS if the product is a solvent-borne liquid.

Is atrazine flammable?

The pure (technical) solid is not classified as flammable and carries an NFPA Flammability of 0. Liquid (4L-type) formulations can contain organic carrier solvents, so some of those products are rated higher for flammability — check the flash point on that specific product SDS.

What tank material is best for atrazine?

For aqueous and standard agrochemical formulations, chemical-service HDPE or XLPE is the recommended primary choice. Stainless steel, FRP, and polypropylene are equally suitable; bare carbon steel should be lined or coated. Solvent-heavy liquid blends may favor stainless or FRP.

Why is secondary containment important for atrazine?

Atrazine is very toxic to aquatic life with long-lasting effects (H400/H410) and is a regulated pesticide. Secondary containment, leak monitoring, and spill controls prevent any release to drains, soil, surface water, or groundwater.