Sodium Bicarbonate[8]

Updated: 2026-09-18

Overview

Sodium bicarbonate (NaHCO3) is a white, crystalline powder with a slightly salty, alkaline taste. It is a versatile compound with applications spanning food, medicine, cleaning, and industrial processes. Its mild alkalinity and non-toxic nature make it a preferred choice in many industries. Discovered in the early 19th century, sodium bicarbonate is produced through the Solvay process or mined from natural deposits. Its ability to release carbon dioxide when heated or exposed to acids underpins its widespread use in baking, fire suppression, and effervescent products.

Physical and Chemical Properties

Sodium bicarbonate is a stable compound at room temperature but decomposes at around 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 alcohol. The solution is mildly alkaline with a pH of 8.4 (1% aqueous solution). Its effervescent reaction with acids produces CO2 gas, which is exploited in baking powders and antacid formulations. The compound is non-flammable and non-toxic, though dust inhalation should be avoided in industrial settings.

Main Applications

In the food industry, sodium bicarbonate serves as a leavening agent in baked goods and a pH regulator in processed foods. Pharmaceutical uses include antacid formulations and electrolyte solutions. It is also a key ingredient in dry chemical fire extinguishers (Class B and C fires). Industrial applications include water treatment, flue gas desulfurization, and leather tanning. Household uses range from cleaning and deodorizing to personal care (e.g., toothpaste). Its versatility and safety profile ensure steady demand across sectors.

Safety and Storage

Sodium bicarbonate is generally recognized as safe (GRAS) by the FDA for food use. However, dust inhalation in industrial settings may cause respiratory irritation. Proper storage requires a cool, dry environment in tightly sealed containers to prevent caking or moisture absorption. Incompatible with strong acids (violent effervescence) and certain metals (e.g., aluminum). Spills can be cleaned with water, and disposal follows local regulations for non-hazardous waste. Personal protective equipment (PPE) like dust masks is recommended for bulk handling.

B2B Procurement Guide

B2B buyers should specify grade (food, pharmaceutical, or industrial), particle size, and packaging (bags, drums, or bulk). Food-grade sodium bicarbonate must meet FCC or USP standards, while industrial-grade focuses on chemical purity. Bulk purchases (tonnage) typically offer 10-30% cost savings over retail packaging. Supplier audits should verify certifications (e.g., ISO, GMP) and logistics capabilities. Just-in-time delivery may be preferable for large-volume users to minimize storage costs. Spot prices fluctuate with soda ash market trends, so long-term contracts are advisable for price stability.