CAS 144-55-8: Sodium Bicarbonate (NaHCO3)
Identity
| CAS Number | 144-55-8 |
| Molecular Formula | NaHCO3 |
| IUPAC Name | sodium hydrogen carbonate |
| Molecular Weight | 84.01 g/mol |
| SMILES | C(=O)(O)[O-].[Na+] |
| Synonyms | baking soda, sodium hydrogen carbonate, bicarbonate of soda, NaHCO3, sodium acid carbonate |
2D Structure
Physical Properties
| Density | 2.2 g/mL at 25°C |
| Boiling Point | 851.0°C |
| Melting Point | 270.0°C |
| Flash Point | None°C |
| Vapor Pressure | 0.0 kPa at 20°C |
| Refractive Index | nD = 1.5 |
| Dielectric Constant | ε = 6.0 |
Safety & GHS Classification
Storage: Store in a cool, dry area. Avoid prolonged exposure to humid air — may cake or decompose. Keep container tightly sealed. Incompatible with strong acids (violent CO2 release).
Material Compatibility Matrix
Plastics
| Material | Rating |
|---|---|
| PTFE | Excellent |
| PVC | Excellent |
| PE | Excellent |
| PP | Excellent |
| PEEK | Excellent |
| PVDF | Excellent |
Rubbers
| Material | Rating |
|---|---|
| Viton | Excellent |
| NBR | Excellent |
| EPDM | Excellent |
| Silicone | Excellent |
| FKM | Excellent |
Metals
| Material | Rating |
|---|---|
| Stainless 316 | Excellent |
| Aluminum | Good |
| Copper | Good |
| Brass | Good |
Applications
- Baking leavening agent (baking powder)
- Antacid medication (Alka-Seltzer, Tums)
- Fire extinguisher agent (soda acid type)
- pH buffer in swimming pools and aquariums
- Personal care products (toothpaste, deodorant)
- Cleaning agent (mild abrasive)
- Flue gas desulfurization
- Medical IV buffer (sodium bicarbonate injection)
External References: PubChem