Tween 80 is a high-grade reagent supplied by Micromaster. Few other chemical names used to denote this reagent include, 2-[2-[3,4-bis(2-hydroxyethoxy)oxolan-2-yl]-2-(2-hydroxyethoxy)ethoxy]ethyl octadec-9-enoate, Polysorbate 80 and Polyoxyethylene Sorbitan Monolaurate. It is a polyethylene sorbitol ester. Tween 80 is available in the form of a clear amber to yellow coloured liquid which has a slight fatty odour. It is stable if stored according to the recommended conditions. It is incompatible with oxidising agents.

• Quantity provided: 500 g/pack
• Molecular formula: C₃₂H₆₀O₁₀
• Molecular weight: 604.822 g/mol

Tween 80 is a widely used non-ionic emulsifier that is added to cosmetics, pharmaceuticals, and foods. Tween is often used as a surfactant for dispersing hydrophobic particles in aqueous solutions and as a non-ionic detergent for selective protein extraction and isolation of nuclei from mammalian cell lines. It is widely used in biochemical applications including: solubilizing proteins, isolating nuclei from cells in culture, growing of tuberculosis bacilli, and emulsifying and dispersing substances in medicinal and food products. It has little or no activity as an anti-bacterial agent except it has been shown to have an adverse effect on the antibacterial effect of methyl paraben and related compounds. Polysorbates have been reported to be incompatible with alkalis, heavy metal salts, phenols, and tannic acid. They may reduce the activity of many preservatives.