Sodium carbonate powder is typically white. This color is due to the chemical composition of the compound, which is sodium hydrogen carbonate (NaHCO3). The white color is a result of the crystal structure and the absence of any colored impurities. According to the Color Index, a standard reference for color identification in the chemical industry, sodium carbonate is classified under the white pigment category. The specific shade of white can vary slightly depending on the purity of the compound and the presence of any contaminants, but it generally falls within the range of white to cream.