Titanium dioxide for pigment

Titanium Dioxide for pigments is primarily categorized into two crystal structures: Anatase and Rutile. Rutile TiO2 is the most common for industrial applications due to its higher refractive index, superior UV resistance, and better durability in outdoor coatings. Anatase TiO2 is preferred for applications requiring a bluer undertone, such as in paper, rubber, and specific fiber industries, though it has lower weather resistance.

When reviewing a COA, prioritize TiO2 content (typically ≥93% for Rutile), Brightness (Whiteness), and Oil Absorption value (which affects dispersibility). Additionally, check the Particle Size Distribution; a narrow distribution ensures optimal opacity and tinting strength. For high-end coatings, verify the surface treatment (e.g., Alumina, Silica, or Zirconium coating) as this determines the pigment's weatherability and gloss retention.

Compliance depends on the end-use. For general industrial use, ISO 591-1:2000 is the standard classification. If the pigment is used in food packaging or toys, it must comply with FDA 21 CFR (USA) or EU 10/2011 regulations. For the European market, ensure the supplier provides a REACH registration number. Furthermore, check for RoHS and heavy metal limits (Lead, Mercury, Cadmium) to ensure environmental safety.

Inorganic surface treatments (like Silica or Alumina) are applied to improve chalking resistance and dispersibility in water-based or solvent-based systems. Organic treatments (like Polyols or Silanes) are often added to reduce moisture absorption and improve flowability in plastic masterbatches. Choosing the wrong treatment can lead to flocculation or poor color development in your final product.

The most significant risk is quality inconsistency between batches. Some suppliers may provide a high-quality sample but ship a lower-grade product (e.g., blending Rutile with Anatase or fillers like Calcium Carbonate). To mitigate this, use third-party inspection services (like SGS or Intertek) to perform Pre-Shipment Inspection (PSI) and verify the purity and whiteness before the balance payment is made.

TiO2 prices are sensitive to raw material costs (Ilmenite ore) and energy prices. It is advisable to negotiate formula-based pricing for long-term contracts. For shipping, FOB (Free On Board) is recommended if you have a reliable freight forwarder, as it gives you control over costs. Ensure the supplier uses moisture-proof packaging (e.g., 25kg paper-plastic composite bags or 1000kg jumbo bags) and provides pallets with shrink-wrap to prevent damage during sea transit.

Always prioritize secure payment methods. For new suppliers, use Escrow services or Letters of Credit (L/C at sight). When sourcing through Made-in-China.com, look for Audited Suppliers who have undergone comprehensive on-site verification. Avoid transferring funds to private bank accounts; ensure the beneficiary name matches the company name on the Proforma Invoice.

Titanium Dioxide is generally classified as non-hazardous cargo, but you must ensure the supplier provides a valid MSDS (Material Safety Data Sheet) and a Non-Hazardous Chemical Declaration for customs clearance. Be aware of Anti-Dumping Duties (ADD); for example, the EU and other regions may impose specific duties on TiO2 originating from certain countries. Always verify the HS Code (typically 3206.11) with your local customs broker to calculate accurate import taxes.