Aibn azobisisobutyronitrile

AIBN (Azobisisobutyronitrile) is a critical radical initiator. For most polymerizations, a purity level of ≥99% is mandatory to ensure reaction stability. Buyers must verify the 10-hour half-life temperature, which is typically around 64°C, to ensure it matches their specific production process. Additionally, the moisture content should be <0.5% to prevent degradation, and the appearance should be a white crystalline powder without visible impurities.

As a hazardous chemical (Class 4.1 Flammable Solid), AIBN must have a valid SDS (Safety Data Sheet) compliant with GHS standards. Suppliers should provide ISO 9001 for quality management and ISO 14001 for environmental standards. For international trade, ensure the product has a UN Number (UN3234 or UN3222) and complies with REACH regulations if exporting to Europe, or TSCA for the United States.

AIBN is thermally unstable and decomposes at room temperature over time. Sourcing professionals must ensure the supplier uses refrigerated storage (below 10°C) and provides cold-chain logistics. Ask the supplier for stability test reports and ensure the packaging includes anti-static liners and UV-protective drums to prevent accidental decomposition during transit.

AIBN is preferred in PVC, PMMA, and PS production because it decomposes at a steady, predictable rate and does not form oxygenated by-products, which prevents yellowing of the final polymer. It is also widely used in organic synthesis and as a foaming agent for rubber and plastics due to the release of nitrogen gas during decomposition.

AIBN is classified as a Self-Reactive Solid Type C or D. It requires Temperature Controlled Containers (Reefer Containers) for sea freight. You must ensure the carrier is certified for Dangerous Goods (DG) handling. Always request a Pre-Shipment Inspection (PSI) to verify that the cooling units are functional and set to the correct SADT (Self-Accelerating Decomposition Temperature) safety margins.

Utilize the Secured Trading services on Made-in-China.com to protect your payment until the goods pass quality inspection. Conduct a factory audit or hire a third-party agency like SGS or Intertek to verify the supplier's hazardous chemical production license. Avoid suppliers who cannot provide a Certificate of Analysis (COA) for the specific batch being shipped.

Focus on Total Cost of Ownership (TCO) rather than just the unit price, as specialized logistics costs can account for 30-50% of the total invoice. Negotiate for staggered deliveries to ensure you receive fresh material, and seek volume-based rebates if your annual consumption exceeds 5-10 metric tons. Always clarify Incoterms; for AIBN, CIF or DAP is often preferred so the supplier handles the complex DG export documentation.

Be aware of Anti-Dumping Duties (ADD) that may apply to chemical exports from certain regions. Ensure the HS Code (typically 2927.00) is declared correctly to avoid customs seizures. Furthermore, verify if your local port has the license to receive Class 4.1 hazardous materials, as not all ports are equipped to handle self-reactive substances.