Where can I find Baking soda in Flumenthal?

Baking soda can also be found in these cities:

Balsthal Biberist Breitenbach Burgdorf Delémont Derendingen Egerkingen Gerlafingen Grenchen Herzogenbuchsee Huttwil Kirchberg Langendorf Langenthal Moutier Murgenthal Oensingen Solothurn Utzenstorf Zuchwil

You can also find this in Flumenthal:

Edible Curd Grated Lemon Peel Flaxseed Bread Fruit Bar Pickled Vegetables Fresh Salt Schupfnudeln Whole Grain Rolls Mayonnaise