Sodium Persulfate Storage — Na2S2O8 Oxidizer Tank Selection

Storing Sodium Persulfate? Start Here

Sodium persulfate is a powerful oxidizer that comes as a white crystalline solid and is often dissolved into solutions for various industrial uses. It's crucial to store it properly to ensure safety and maintain its effectiveness over time. Whether you're using it for polymer initiation or etching in electronics, understanding the right storage methods can make a big difference in your operations.

Can you store it in a poly tank?

Yes, you can store sodium persulfate solutions in poly tanks. High-density polyethylene (HDPE) and cross-linked polyethylene (XLPE) tanks are suitable for solutions up to 25% concentration. XLPE is often the preferred choice for bulk storage due to its strength and chemical resistance.

Watch out for temperature sensitivity

Sodium persulfate solutions are sensitive to temperature changes. At temperatures below 40°F, solutions near 25% concentration can crystallize, potentially clogging tanks and lines. Conversely, temperatures above 100°F can accelerate decomposition, so it's best to keep storage within the 45–85°F range.

The safety that actually matters

• Use appropriate gaskets: EPDM is recommended for bulk tank manways.
• Keep tanks shaded or painted white to avoid overheating.
• Regularly inspect and maintain tanks and fittings to prevent leaks and degradation.

Common questions

What type of tank is best for sodium persulfate?

XLPE tanks are generally recommended for their durability and resistance to chemical attack.

Can sodium persulfate be stored outdoors?

Yes, but ensure tanks are shaded or painted to reflect heat, preventing temperature-related issues.

How often should gaskets be replaced?

EPDM gaskets should be replaced annually to ensure a proper seal and prevent leaks.