Tween 80 by MP Biomedicals is a high grade reagent also known as Polysorbate 80. This is a non-ionic surfactant and emulsifier that often finds applications in foods and cosmetics. This synthetic compound is available as a viscous, water-soluble yellow liquid. It is derived from polyethoxylated sorbitan and oleic acid. These reagents are soluble or dispersible in water, but differs widely in organic solvents and oil solubility. CAS No.: 9005-65-6 Quantity Provided: 100 ml per bottle Molecular Formula: C64H124O26 Molecular Weight: 1310 Soluble in water to give a clear yellow solution Tween 80 has been widely used in biochemical applications as a detergent, including: solubilizing proteins, isolating nuclei from cells in culture, growing of tubercle bacilli, and emulsifying and dispersing substances in medicinal and food products. It has been shown to have an adverse effect on the antibacterial effect of methyl paraben and related compounds. Adding Tween 80 to ice creams prevents milk proteins from completely coating the fat droplets, which allows the ice cream to hold its shape while melting. In medical applications it is employed to stabilize aqueous formulations of medications for parenteral administration. It is also used in biochemical tests to identify the phenotype of a strain or isolate of some mycobacteria.