Laundry Soda Refill 550, Add 1 tbsp to your washing machine before adding laundry (as tub fills on a standard machine; directly into tub before adding laundry on a HE/front loading machine). Use 1.5 tbsp and warm water for heavily soiled laundry.,Sodium Carbonate, Magnesium sulfate, Sodium chloride, Sodium Bicarbonate