Sodium Bicarbonate[2]
Overview
Sodium bicarbonate (NaHCO₃) is a versatile inorganic compound with a mild alkaline pH. It occurs naturally as nahcolite but is primarily produced synthetically through the Solvay process. Its stability, low toxicity, and reactivity make it indispensable across industries. Commonly called baking soda, it is a staple in households for baking and cleaning. In B2B contexts, it is supplied in bulk quantities, with grades tailored to specific applications, such as food-grade for edible products or technical-grade for industrial uses.
Physical and Chemical Properties
Sodium bicarbonate appears as an odorless, white powder with a slightly salty taste. It decomposes at temperatures above 50°C, releasing carbon dioxide (CO₂), which explains its use as a leavening agent in baking. The compound is water-soluble but exhibits lower solubility in organic solvents. Its buffering capacity allows it to neutralize acids and bases, making it useful in pH adjustment. Despite its stability, prolonged exposure to moisture or acids can reduce its efficacy, necessitating proper storage.
Main Applications
In the food industry, sodium bicarbonate serves as a leavening agent in baked goods and a pH regulator in beverages. Pharmaceutical formulations use it as an antacid or electrolyte replenisher. Industrially, it acts as a mild abrasive in cleaning products and a flame retardant in fire extinguishers. Environmental applications include flue gas desulfurization, where it neutralizes sulfur oxides. Its versatility also extends to agriculture, where it treats soil acidity and fungal infections in crops.
Safety and Storage
Sodium bicarbonate is non-toxic but may cause mild irritation upon inhalation or prolonged skin contact. Ingestion of large quantities can lead to metabolic alkalosis. Storage requires airtight containers in dry environments to prevent caking or premature decomposition. For industrial handling, dust control measures (e.g., ventilation) are recommended. Compatibility with other chemicals should be verified—avoid mixing with strong acids, which can cause rapid CO₂ release and pressure buildup in closed systems.
B2B Procurement Guide
Buyers should specify the required grade (food, pharmaceutical, or technical) and particle size, which affects dissolution rates. Bulk pricing depends on purity (typically 99–99.7%) and order volume, with discounts for multi-ton purchases. Reliable suppliers provide certificates of analysis (CoA) and comply with standards like USP, FCC, or ASTM. Packaging options include 25-kg bags or 1-ton super sacks. For international shipments, ensure compliance with local regulations (e.g., FDA for food-grade imports).
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