碳酸氢钠 Traditional form: 碳酸氫鈉 Pinyin (reading): tànsuānqīngnà Definitions: sodium bicarbonate Characters: 碳 - carbon 酸 - tart, sour; spoiled; acid 氢 - ammonia 钠 - sodium, natrium; to sharpen wood Traditional characters: 碳 - carbon 酸 - tart, sour; spoiled; acid 氫 - ammonia 鈉 - sodium, natrium; to sharpen wood