Propylene glycol alginate (Propylene glycol alginate, Propane-1 '2-diol alginate, propane-1' 2-diol alginate, E405) jẹ iyọ ti alginic acid ti o da lori ọti polyatomic propylene glycol.
O jẹ irọrun tuka ninu omi ati nitorinaa a gba ojutu viscosity giga kan.
O ti wa ni lo bi awọn kan thickener, stabilizer ati emulsifier ni isejade ti eso ati ọti-lile ohun mimu, fats, yan awọn apopọ; ni Kosimetik, ni ile elegbogi, ati be be lo.