Iron oxide yellow 313

When purchasing Iron Oxide Yellow 313, you must prioritize Fe2O3 content (typically ≥86%) to ensure high tinting strength. Key parameters include oil absorption (25-35g/100g), which affects paint viscosity, and moisture content (≤1.0%) to prevent clumping. Additionally, verify the sieve residue (325 mesh ≤0.3%) to ensure a fine particle size for smooth dispersion in coatings and plastics.

Iron Oxide Yellow 313 is a versatile synthetic pigment widely used in construction (cement, bricks, and terrazzo) due to its excellent alkali resistance. It is also highly effective in coatings, paints, and plastics because of its superior lightfastness and weather resistance, ensuring that colors do not fade under prolonged UV exposure.

For international trade, ensure the supplier provides a Certificate of Analysis (COA) for every batch. If exporting to the EU, REACH compliance is mandatory. For environmental safety, check for ISO 9001 (Quality Management) and ISO 14001 (Environmental Management) certifications to ensure the production process meets global chemical safety standards.

Color consistency is the biggest challenge in pigment sourcing. Buyers should request a Master Sample and require the supplier to perform a Delta E (ΔE) color difference test (ideally <1.0) against the standard. Always ask for pre-shipment samples (PSS) from the specific production lot you are purchasing to verify the hue and tinting strength before the goods leave the factory.

The main risks include quality variance between samples and bulk orders, and moisture damage during sea transit. To mitigate this, use moisture-proof packaging (e.g., 25kg valve bags with PE liners) and consider hiring a third-party inspection agency like SGS or Intertek to conduct a loading supervision at the supplier's warehouse.

Chemical pricing is often tied to raw material (scrap iron) costs and environmental tax fluctuations. Negotiate based on volume tiers; for example, a full container load (FCL) usually yields a 10-15% discount compared to LCL. For new buyers, suggest a trial order of 1-5 tons to establish trust before moving to high-volume contracts.

Always use Trade Terms like FOB or CIF to clearly define risk transfer. For payment, Letter of Credit (L/C) or Escrow services are recommended for large transactions. When sourcing from China, platforms like Made-in-China.com offer audit reports on suppliers, which helps verify the manufacturer's actual production capacity and legal status.

Iron Oxide Yellow is classified as non-hazardous for transport, but it requires a Material Safety Data Sheet (MSDS) and a Non-Hazardous Chemical Appraisal Report for customs clearance. Ensure the pallets are shrink-wrapped and palletized to prevent bag breakage, which can lead to significant contamination and port fines.