Raw powder

Purity is the most critical factor for raw powders. You must request a Certificate of Analysis (COA) for every batch, specifically looking for HPLC (High-Performance Liquid Chromatography) or GC-MS (Gas Chromatography-Mass Spectrometry) test results. Ensure the purity levels meet your industry standards (typically ≥98% or 99%). Additionally, verify the Heavy Metal Content (Lead, Arsenic, Mercury) and Microbial Limits to ensure the product is safe for its intended application.

Beyond purity, pay close attention to Particle Size (Mesh), as this affects solubility and bioavailability. For chemical or pharmaceutical raw materials, check the CAS Number to ensure the chemical identity is exact. For botanical extracts, verify the Standardized Active Ingredient percentage rather than just the extraction ratio. Always confirm the Loss on Drying (LOD) specification, as excess moisture can lead to degradation or clumping during storage.

Compliance depends on the end-use. For food or supplement grade powders, look for GMP (Good Manufacturing Practice), ISO 22000, or HACCP certifications. If the powder is a chemical substance, ensure the supplier provides a comprehensive MSDS (Material Safety Data Sheet). For U.S. markets, FDA registration of the facility is often required, while European markets may require REACH compliance for chemical substances.

Request Stability Testing Data from the supplier, which outlines how the powder reacts to light, heat, and humidity over time. Professional suppliers should provide clear Storage Instructions (e.g., 'Store at 2-8°C' or 'Keep away from direct sunlight'). Ensure the Re-test Date or Expiry Date is clearly marked on the packaging to avoid receiving near-expiry stock.

Raw powders are often flagged by customs as 'Sensitive Goods.' There is a high risk of Customs Seizure if the documentation is incomplete. To mitigate this, ensure the supplier provides a 'Condition of Transport' certificate (DGM report) and clearly labels the package with the correct HS Code. Using specialized freight forwarders experienced in chemical or pharmaceutical logistics is highly recommended.

Always use Secure Payment Terms such as those offered on Made-in-China.com, which provide escrow-like protection. For first-time orders, avoid 100% upfront payments; instead, negotiate a 30% deposit and 70% balance after a successful third-party pre-shipment inspection. Explicitly state in the contract that the balance is contingent upon the Purity Verification of a sample taken from the actual production lot.

Raw powders are susceptible to moisture and oxidation. Insist on Vacuum-Sealed Aluminum Foil Bags or Double-Layer PE Bags inside fiber drums. For hygroscopic (moisture-absorbing) powders, request Desiccant Packets inside the secondary packaging. Ensure the outer drums are UN-Rated if the powder is classified as hazardous to prevent leakage and legal liabilities during transit.

Focus on Audited Suppliers on Made-in-China.com who have undergone on-site inspections by third-party agencies like SGS or Intertek. Look for suppliers with a long history of exports to your specific region, as they will be more familiar with your local regulatory requirements and import documentation.