Polysorbate 20 Storage — Tween 20 Nonionic Surfactant Tank Selection

Storing Polysorbate 20? Start Here

Polysorbate 20, also known as Tween 20, is a versatile nonionic surfactant commonly used in pharmaceuticals, cosmetics, and food products. It's a gentle, yellow liquid that's fully miscible with water and many polar solvents, making it ideal for a wide range of applications. Whether you're using it to stabilize proteins in biologic drugs, as a gentle cleanser in cosmetics, or as an emulsifier in food, proper storage is key to maintaining its effectiveness.

Can you store it in a poly tank?

Yes, polysorbate 20 can be stored in polyethylene tanks. It's non-aggressive and non-corrosive, making it compatible with HDPE and XLPE tanks, which are standard for cosmetic and food-grade bulk storage. However, avoid using copper or brass, as they can cause peroxide formation.

Watch out for peroxide formation

One key issue with storing polysorbate 20 is its tendency to form peroxides over time, especially when in contact with certain metals like copper and brass. This can affect the stability and quality of pharmaceutical-grade products. Using stainless steel or polyolefin materials can help minimize this risk.

The safety that actually matters

• Ensure tanks and fittings are made of compatible materials like HDPE, XLPE, or stainless steel.
• Avoid copper and brass to prevent peroxide formation.
• Use appropriate gaskets, such as EPDM or Viton, based on your specific application needs.

Common questions

Can polysorbate 20 be stored in cold temperatures?

Yes, but keep in mind its melting point is around 7°C, so it may become more viscous.

Is polysorbate 20 safe for food applications?

Yes, it's approved as a food additive (E432) and used in various food products.

What materials should be avoided for storage?

Avoid copper and brass, as they can catalyze peroxide formation in polysorbate 20.