Sodium Bicarbonate[3]

Updated: 2026-09-15

Overview

Sodium bicarbonate (NaHCO3) is a white crystalline powder with a slightly salty, alkaline taste. It is a versatile compound widely used in food, pharmaceuticals, cleaning, and industrial applications. Its ability to release carbon dioxide when heated or mixed with acids makes it valuable in baking and effervescent products. Discovered in the early 19th century, sodium bicarbonate is now mass-produced via the Solvay process or mined from natural deposits. It is non-toxic and environmentally friendly, making it a preferred choice in many applications.

Physical and Chemical Properties

Sodium bicarbonate is a stable compound under normal conditions but decomposes at temperatures above 50°C, releasing carbon dioxide and forming sodium carbonate. It is soluble in water (9.6 g/100 mL at 20°C) and slightly soluble in ethanol. Its aqueous solution is weakly alkaline (pH ~8.4). The compound reacts with acids to produce carbon dioxide gas, a property exploited in baking and fire extinguishers. Its mild abrasive and deodorizing properties make it a popular ingredient in cleaning products.

Main Applications

In the food industry, sodium bicarbonate is used as a leavening agent in baked goods, a pH regulator, and a stabilizer. It is also a key ingredient in antacids and effervescent tablets in the pharmaceutical sector. Industrially, it serves as a buffering agent, fire extinguisher component, and cleaning agent. In agriculture, it is used to neutralize acidic soils and as a fungicide. Its versatility and low cost ensure consistent demand across sectors.

Safety and Storage

Sodium bicarbonate is generally recognized as safe (GRAS) by regulatory agencies. However, prolonged exposure to dust may irritate the respiratory tract. Store in a cool, dry place in tightly sealed containers to prevent moisture absorption and clumping. Avoid mixing with strong acids or oxidizing agents, as this may cause rapid gas release. For industrial use, ensure proper ventilation and personal protective equipment (PPE) when handling large quantities.

B2B Procurement Guide

When procuring sodium bicarbonate, specify the required grade (food, pharmaceutical, or industrial) based on purity standards. Food-grade (FCC) and USP-grade are essential for edible and medicinal uses. Evaluate suppliers based on certifications (e.g., ISO, GMP), packaging options (bulk bags, drums), and logistics capabilities. Price fluctuations are minimal, but bulk purchases (tonnage) typically offer cost savings. Request COA (Certificate of Analysis) for each batch to verify quality.