Parameter Category | Specific Parameter | Typical Value/Description |
Basic Information | Chemical Name | Sodium Bicarbonate |
Chemical Formula | NaHCO₃ | |
Molecular Weight | 84.01 g/mol | |
Physical Properties | Appearance | White crystalline powder or fine granules |
Bulk Density | 0.8 - 1.0 g/cm³ | |
Melting Point | Decomposes at ~50℃ (releases CO₂ and H₂O; forms Na₂CO₃ at higher temperatures) | |
Solubility | 9.6 g/100mL water at 20℃; solubility increases slightly with temperature | |
Chemical Properties | pH Value (1% Aqueous Solution) | 8.3 (weakly alkaline) |
Stability | Stable in dry air; decomposes in moisture/heat; reacts with acids to produce CO₂ | |
Industrial/Food-Grade Indices | Purity (NaHCO₃ Content) | Food-grade: ≥99.0%; Industrial-grade: ≥98.5% |
Moisture Content | ≤0.2% (food-grade); ≤0.5% (industrial-grade) | |
Heavy Metal Content | Food-grade: Pb ≤1 mg/kg, As ≤0.5 mg/kg (meets food safety standards) | |
Safety Data | Hazard Class | Non-hazardous (GRAS status for food use; mild irritation if in contact with eyes/skin) |
Storage Condition | Store in cool, dry, well-ventilated area; keep sealed to prevent moisture absorption |
2.Sodium bicarbonate can be used to produce acid-base fire extinguishers and foam fire extinguishers. In the rubber industry, sodium bicarbonate can be used in the production of rubber and sponge.
3. In the metallurgical industry, sodium bicarbonate can be used as a flux for casting steel ingots. In the machinery industry, sodium bicarbonate can be used as a forming aid for sand molds in cast steel (sand casting). In the dyeing and printing industry, sodium bicarbonate can be used as a color-fixing agent for dyeing and printing, an acid-base buffer, and a post-treatment agent for fabric dyeing and finishing. Adding baking soda during dyeing can prevent color streaks from forming on the yarn tubes and can also be used as a detergent for wool.
Food processing uses
4. In food processing, sodium bicarbonate is one of the most widely used leavening agents, used in the production of biscuits, bread, etc. However, it leaves residual sodium carbonate after application. Excessive use can cause the alkalinity of food to be too high, resulting in a deterioration of flavor and a yellowish-brown color. It is a carbon dioxide generator in carbonated beverages. It can be compounded with alum to form alkaline baking powder, and it can also be compounded with soda ash to form civilian stone alkali.
5. Na2CO3 can be used as a color protector for fruits and vegetables in vegetable processing. Adding about 0.1% to 0.2% sodium bicarbonate when washing fruits and vegetables can stabilize the green color.
When sodium bicarbonate is used as a fruit and vegetable processing agent, by boiling and bleaching the fruits and vegetables, it can increase the pH value of the fruits and vegetables, improve the water-holding capacity of proteins, promote the softening of food tissue cells, and dissolve astringent components. In addition, it has a deodorizing effect on goat milk, with a usage amount of 0.001% to 0.002%.