Baking Soda or Bicarbonate of Soda are one in the same.
The uses for Bicarb Soda, apart from uses in baking, are many and varied, among them are cleaning, baking, tooth care, detoxing, deodorant, exfoliating, trace element in fertilizer, combined with vinegar it has amazing cleaning properties, and the list goes on.
Sodium Bicarbonate, commonly known as baking soda is a big part of the formulation when making bath bombs and other fun fizzy bath products. As you probably know, citric acid, the other main ingredient, and the sodium bicarbonate work together to create that great fizzy reaction when you set the bath bombs in the water. Having top quality ingredients makes all the difference between really great fizzy foaming bath bombs, and making up a batch of duds that just dissolve with no foaming or fizz.