[--]

Jyutping siu2 sou1 daa2
Pinyin xiǎo sū dǎ

Definitions (Wiktionary)
  1. noun
    sodium bicarbonate; baking soda
    (syn.) 苏打粉, 蘇打粉

小蘇打 [-苏-]

Jyutping
Pinyin xiǎo sū dá

Definitions (CC-CEDICT)
  1. baking soda
  2. sodium bicarbonate