Overview
Azodicarbonamide (ADA) is a chemical compound primarily used as a blowing agent in the production of foamed plastics. It is valued for its ability to decompose at high temperatures, releasing gases that create a uniform cellular structure in materials like PVC, rubber, and synthetic leather. ADA is also used in the food industry as a flour bleaching agent, though this application is heavily regulated due to potential health concerns. First synthesized in the early 20th century, ADA gained industrial prominence due to its efficiency and cost-effectiveness. Its non-toxic nature and predictable decomposition make it a preferred choice for manufacturers seeking consistent foaming results. However, its use in food applications has declined in many regions due to stricter safety regulations.
Physical and Chemical Properties
Azodicarbonamide appears as a yellow to orange crystalline powder with a density of 1.65 g/cm³. It decomposes at temperatures between 225-230°C, releasing nitrogen, carbon monoxide, and carbon dioxide gases. This decomposition is exothermic, making ADA effective for creating lightweight, porous materials. The compound is slightly soluble in water but dissolves more readily in organic solvents like dimethyl sulfoxide (DMSO). Its stability at room temperature allows for safe storage and handling, though precautions must be taken to avoid exposure to heat sources that could trigger premature decomposition.
Main Applications
The primary application of azodicarbonamide is as a blowing agent in the plastics and rubber industries. It is used to produce foamed PVC for applications such as floor mats, shoe soles, and synthetic leather. The gas released during decomposition creates a uniform cellular structure, enhancing the material's flexibility and reducing weight. In the food industry, ADA has been used as a flour bleaching agent and dough conditioner. However, due to concerns over potential health effects, its use in food is banned in the European Union and strictly regulated in other regions. Industrial applications remain widespread, particularly in Asia and North America.
Safety and Storage
Azodicarbonamide is generally considered non-toxic, but precautions should be taken to avoid inhalation or skin contact, as it may cause respiratory or skin irritation. Proper storage involves keeping the compound in a cool, dry place away from heat sources and direct sunlight to prevent premature decomposition. Workers handling ADA should use personal protective equipment (PPE) such as gloves and masks. In case of accidental exposure, affected areas should be rinsed thoroughly with water. Spills should be contained and cleaned up promptly to prevent environmental contamination.
B2B Procurement Guide
When procuring azodicarbonamide, B2B buyers should verify the CAS number (123-77-3) and purity levels to ensure product quality. It is essential to check regulatory compliance, especially if the compound will be used in food-related applications, as restrictions vary by region. Suppliers should provide detailed safety data sheets (SDS) and certificates of analysis (CoA). Buyers may also consider bulk purchasing to reduce costs, as prices typically range from $3 to $5 per kg. Establishing long-term relationships with reputable suppliers can ensure consistent quality and reliable delivery schedules.
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