40 C.F.R. Table 1 to Subpart ZZ of Part 98
CO 2 Emission Factors for Carbonate-Based Raw Materials
Cite as 40 C.F.R. Table 1 to Subpart ZZ of Part 98 (2026)
Table 1 to Subpart ZZ of Part 98—CO 2 Emission Factors for Carbonate-Based Raw Materials Carbonate Mineral name(s) CO 2 emission factor a BaCO 3 Witherite, Barium carbonate 0.223 CaCO 3 Limestone, Calcium Carbonate, Calcite, Aragonite 0.440 Ca(Fe,Mg,Mn)(CO 3 ) 2 Ankerite b 0.408-0.476 CaMg(CO 3 ) 2 Dolomite 0.477 FeCO 3 Siderite 0.380 K 2 CO 3 Potassium carbonate 0.318 Li 2 CO 3 Lithium carbonate 0.596 MgCO 3 Magnesite 0.522 MnCO 3 Rhodochrosite 0.383 Na 2 CO 3 Sodium carbonate, Soda ash 0.415 SrCO 3 Strontium carbonate, Strontianite 0.298 a Emission factors are in units of metric tons of CO 2 emitted per metric ton of carbonate-based material. b Ankerite emission factors are based on a formula weight range that assumes Fe, Mg, and Mn are present in amounts of at least 1.0 percent.