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Jyutping so1 daa2 fan2
Pinyin shū dǎ fěn

Definitions (CC-CANTO)
  1. baking soda
Definitions (Wiktionary)
  1. noun, Hong-Kong
    baking soda
    (syn.) 苏打粉, 蘇打粉
Definitions (Kaifangcidian)
  1. 蘇打粉 – 苏打粉
  2. 小蘇打 – 小苏打