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Polyoxyethylenesorbitan Monolaurate (Tween 20)

Polyoxyethylenesorbitan Monolaurate (Tween 20)

Cat no: P4379

Supplier: United States Biological
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Tween-20 is a polysorbate surfactant whose stability and relative non-toxicity allow it to be used as a detergent and emulsifier in a number of domestic, scientific, and pharmacological applications. It is a polyoxyethylene derivative of sorbitan monolaurate, and is distinguished from the other members in the Tween range by the length of the polyoxyethylene chain. The commercial product contains a range of chemical species. Appearance: Yellow to amber viscous liquid. Hydroxyl Number: 96-108 Water: (same/less than)3% Residue of Ignition: (same/less than)0.25% Arsenic: (same/less than)0.0003% Heavy Metals: (same/less than)0.001% RNase, DNase: None Detected Biological applications: Tween 20 has a broad range of applications. For example, it is used: to stabilize purified protein derivative (PPD) solution, used in skin testing for tuberculosis exposure, as a blocking agent in immunologic assays, such as Western blots and ELISA and as a solubilizing agent of membrane proteins for lysing mammalian cells, at a concentration of 0.05 to 0.5%.
Catalogue number: P4379
Size: 1L
References: 1. Ayorinde FO, Gelain SV, Johnson JH Jr, Wan LW. (2000). "Analysis of some commercial polysorbate formulations using matrix-assisted laser desorption/ionization time-of-flight mass spectrometry". Rapid Communications in Mass Spectrometry 14 (22): 2116-2124. PMID 11114018. Retrieved on 7 August 2006.. 2. Joint FAO/WHO Expert Committee on Food Additives (1974). Toxicological evaluation of some food additives including anticaking agents, antimicrobials, antioxidants, emulsifiers and thickening agents. WHO Food Additives Series No. 5. World Health Organization. Retrieved on 7 August 2006

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