Borax Storage — Na2B4O7 Sodium Tetraborate Tank Selection

Storing Borax? Start Here

Borax, also known as sodium tetraborate, is a versatile white crystalline powder used in various industries like wood preservation, fiberglass manufacturing, and as a flame retardant. It dissolves in water to form a mildly alkaline solution, which makes it suitable for many applications. However, when planning to store borax, especially in large quantities, it's important to consider the right type of tank and storage conditions to ensure safety and effectiveness.

Can you store it in a poly tank?

Yes, borax can be stored in polyethylene tanks. It is generally compatible with HDPE and XLPE tanks, making them a standard choice for both day-tank and bulk-tank storage. Polypropylene and PVC are also suitable for use, especially in hot dissolver applications up to 180°F.

Key Issue: Temperature Sensitivity

Borax solutions can become problematic if they cool below 50°F, as they may approach saturation and precipitate out. To prevent this, it's recommended to maintain tank temperatures between 50°F and 70°F using heat tracing if necessary, ensuring the solution remains stable and fully dissolved.

The safety that actually matters

• Ensure tanks are kept at the right temperature to prevent crystallization.
• Use appropriate gaskets, such as EPDM or Viton, to ensure chemical compatibility and prevent leaks.
• Handle borax with care to avoid skin and eye irritation, as it can cause serious irritation upon contact.

Common questions

Is borax safe for long-term storage?

Yes, when stored properly in compatible tanks and at the right temperature, borax is safe for long-term storage.

Can borax solutions be stored in stainless steel tanks?

Yes, both 316L and 304 stainless steel are suitable for storing borax solutions without risk of pitting or corrosion.

What should I do if the borax solution begins to crystallize?

Increase the tank temperature to dissolve the crystals back into solution, ensuring it remains between 50°F and 70°F.