Monoammonium Phosphate Storage — HDPE MAP Fertilizer Tank Guide

Storing Monoammonium Phosphate? Start Here

Monoammonium Phosphate (MAP) is a versatile chemical used primarily as a high-phosphate fertilizer and as a fire suppression agent. It comes in a solid form that can absorb moisture from the air, which may cause it to cake. This property requires careful storage in dry conditions. MAP is acidic, so it's important to avoid storing it in aluminum containers, as it can cause corrosion. It's also crucial to keep it away from strong alkalis, which can react with MAP and generate heat.

Can you store it in a poly tank?

Yes, you can store MAP in poly tanks. High-density polyethylene (HDPE) and cross-linked polyethylene (XLPE) tanks are both suitable for storing MAP solutions. These materials are rated to handle the acidic nature of MAP without any issues. However, ensure that the tanks are kept dry to prevent the solid form from absorbing moisture and caking.

Watch out for moisture

MAP is hygroscopic, meaning it can absorb moisture from the air. This can lead to caking, making it difficult to handle. To prevent this, store MAP in sealed bags or containers and keep it in a dry environment. If using it in solution form, ensure that your storage tanks are well-sealed and protected from humidity.

The safety that actually matters

• Store in a dry, climate-controlled area to prevent caking.
• Avoid aluminum containers to prevent corrosion.
• Keep away from strong alkalis to avoid hazardous reactions.
• Use appropriate gaskets as per manufacturer recommendations.
• Ensure secondary containment to manage potential leaks.

Common questions

Is it safe to store MAP in a metal tank?

Yes, but only if it's stainless steel. Avoid aluminum as it can corrode.

What type of gaskets should I use?

Both EPDM and Viton gaskets are suitable. Always check with the manufacturer's chart for compatibility.

Can MAP be stored outdoors?

It's best to store MAP indoors in a dry, controlled environment to prevent moisture absorption.