Ammonium hydrogen carbonate
| Formula: | CH5NO3 |
| Chemical formula: | (NH4)HCO3 |
| Density: | 1.586 g/cm3 |
| Molar mass: | 79.06 g/mol |
| CAS number: | 1066-33-7 |
| HS code: | 28361000 |
| EC number: | 213-911-5 |
| Storage (temperature): | at +2 °C to +25 °C |
| SDS | available |
| RTECS: | BO8600000 |
| R phrase: | R 22 |
| Odour: | Slightly of ammonia |
| Form: | solid |
| Color: | colourless |
| pH value: | ~ 8 (50 g/l 20 °C) |
| Solubility in water: | 220 g/l (20 °C) |
| Solubility in ethanol: | insoluble |
| Melting point: | 106 °C |
| Vapour pressure: | 67 hPa (20 °C) |
| Thermal decomposition: | ~ 60 °C |
| Assay | ≤ | 98.0 – 101.0 | % |
| Solubility | ≤ | Conforms | % |
| Description | ≤ | Conforms | % |
| Identification | ~ | Conforms | % |
| Chloride | ≤ | 0.003 | % |
| Sulphate | 0.005 | ||
| Heavy metals | 0.003 | ||
| pH | 8 | ||
| Nonvolatile resitre | 0.05 |
Ammonium hydrogen carbonate is a white crystalline powder commonly used as a leavening agent and in chemical industries for gas generation.
🏭⚗️ Production
Ammonium hydrogen carbonate is produced by reacting ammonia gas with carbon dioxide and water under controlled temperature and pressure conditions, often forming a loose, powdery solid.
🔬 Properties
Ammonium hydrogen carbonate appears as a white, odorless crystalline powder with the chemical formula NH₄HCO₃ and a molar mass of approximately 79.06 g/mol. It decomposes at about 36°C, releasing ammonia, carbon dioxide, and water. It is soluble in water but unstable when heated.
🧪 Applications
This compound is widely used as a leavening agent in baking, especially in traditional recipes like gingerbread and cookies. It also serves in fire-extinguishing powders, as a reagent in chemical synthesis, and in laboratory applications requiring a source of ammonia and carbon dioxide.
⚠️ Safety
Ammonium hydrogen carbonate can release irritating gases such as ammonia and carbon dioxide, especially when heated or exposed to acids. It may cause respiratory irritation upon inhalation and irritation to eyes and skin. Proper ventilation and protective equipment like gloves and goggles are recommended. It should be stored in a cool, dry place away from acids and moisture.
