Sodium carbonate (Na2CO3), nauyin kwayoyin 105.99.Tsaftar sinadaran ya fi kashi 99.2% (mass fraction), wanda kuma ake kira soda ash, amma rabe-rabe na gishiri ne, ba alkali ba.Har ila yau, an san shi da soda ko alkali ash a kasuwancin duniya.Yana da wani muhimmin sinadari mai mahimmanci, wanda aka fi amfani dashi wajen samar da gilashin lebur, samfuran gilashi da yumbu glazes.Hakanan ana amfani dashi sosai wajen wankewa, kawar da acid da sarrafa abinci.