This standard provides standard test methods for the analysis of commercial soda ash (sodium carbonate) to ensure compliance with specifications and manufacturing controls. The standard covers a number of analyses of soda ash, including total alkalinity (TA), sodium hydrogen carbonic acid, heating loss, moisture, sodium chloride, sodium sulfate, iron content, and screening analysis. The standard is expressed in SI units and makes explicit requirements for toxicity and treatment measures in the safety data table (SDS). The method provides detailed and systematic technical specifications for determining the mass and use of soda ash.