• British Pharmacopoeia Volume IV
  • Appendices
  • Appendix I A. General Reagents

Polysorbate 20
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Polysorbate 20 Polyoxyethylene(20) sorbitan monolaurate; (9005-64-5)

General reagent grade of commerce (Tween 20 is suitable).

A yellow or brownish yellow, oily liquid; weight per  ml, about 1.073 to 1.078  g.