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  • Span

    Span

    I.Overview Sorbitan fatty acid ester (Span) is a non-ionic surfactant regarding fatty acids groups as the hydrophobic part and sorbitan groups as the hydrophilic part. Polyoxyethylene (20) sorbitan fatty acid ester (Tween) is a non-ionic surfactant regarding fatty acids groups as the hydrophobic part and sorbitan polyethylene glycol ether groups as the hydrophilic part. Ⅱ. Quality Standards (Polysorbate-80 will abide by the Standard CP2015, and other series will abide by the Standard USP32)...