Where can I find Baking soda in Sankt Urban?

Baking soda can also be found in these cities:

Aarau Balsthal Buchs Burgdorf Derendingen Egerkingen Egolzwil Erlinsbach Gerlafingen Gränichen Herzogenbuchsee Huttwil Kirchberg Langenthal Lostorf Murgenthal Oensingen Oftringen Olten Reiden Rothrist Schöftland Schönenwerd Suhr Sursee Unterentfelden Wolhusen Zell Zofingen

You can also find this in Sankt Urban:

Gin Cookies Buttered Toast Sausages Edible Curd Grated Lemon Peel Flaxseed Bread Fruit Bar Pickled Vegetables Fresh