alc-0159 alc-0159 alc-0159 is a peg/lipid conjugate (i.e. pegylated lipid), specifically, it is the n,n-dimyristylamide of 2-hydroxyacetic acid, o-pegylated to a peg chain mass of about 2 kilodaltons (corresponding to about 45-46 ethylene oxide units per molecule of n,n-dimyristyl hydroxyacetamide). it is a non-ionic surfactant by its nature. it has been deployed in the pfizer-biontech sars-cov-2 mrna vaccine (0.05 mg per dose) that contains the active ingredient tozinameran. alc-0159 names other names 2--n,n-ditetradecylacetamide identifiers cas number 1849616-42-7 unii pjh39umu6h except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references