Where can I find Baking soda in Grenchen?

Baking soda can also be found in these cities:

Biberist Biel Bienne Brugg Burgdorf Delémont Derendingen Gerlafingen Hasle bei Burgdorf Ipsach Kirchberg Langendorf Lyss Moutier Münchenbuchsee Nidau Solothurn Tavannes Utzenstorf Zuchwil

You can also find this in Grenchen:

Lemonades Instant Coffee Pumpkin Seed Roll Canned Meat Frying And Frying Fat Seasoning Sauces Absinthe Aroma Pack Soups Ready Dishes White Wine