Synonyms: Potassium hydrogen carbonate Grade: USP Purity Limit: ≥ 99.5% (Anhydrous Assay CAS No.: 298-14-6 Molecular Formula: KHCO3 Molecular Weight: 100.12 MDL No.: MFCD00011402 Appearance: White Crystalline Density: 2.17 Storage Temperature: Store at RT Warnings: Hygroscopic!