Solvent blue 35

Solvent Blue 35 is an anthraquinone-based oil-soluble dye. When sourcing, you must verify the purity level (typically ≥98%), melting point (approx. 120-122°C), and moisture content (≤1%). For high-end applications like plastics or inks, ensure the heat resistance is rated at 250°C-300°C to prevent color degradation during injection molding or extrusion.

It is primarily used for coloring plastics (PS, ABS, PC, PMMA, rigid PVC), printing inks, and industrial lubricants. In the automotive sector, it is used for fuel and oil marking. Its excellent transparency and lightfastness (Grade 7-8) make it ideal for high-visibility consumer goods and outdoor plastic components.

As a chemical product, it must comply with REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) for the EU market and TSCA for the US. Ensure the supplier provides a valid SDS (Safety Data Sheet) according to GHS standards. If used in food-contact packaging, it must meet FDA or EU 10/2011 regulations regarding specific migration limits.

Request a COA (Certificate of Analysis) for the specific batch. Conduct a color matching test using a spectrophotometer to measure the Delta E (ΔE) value, which should be <1.0 compared to your standard sample. Additionally, perform a solubility test in organic solvents like ethanol or xylene to ensure there is no undissolved residue, which could clog machinery.

Chemicals are often classified as sensitive cargo. While Solvent Blue 35 is generally non-hazardous, some customs authorities may require a Certification for Safe Transport of Chemical Goods. Ensure the packaging is double-layered (PE bag inside a fiber drum) to prevent leakage and moisture absorption during sea transit.

Use platforms like Made-in-China.com to identify Audited Suppliers. Prioritize manufacturers with ISO 9001:2015 certification. To secure your funds, utilize secured payment terms and consider a third-party pre-shipment inspection to verify that the quantity and batch numbers match the proforma invoice.

Negotiate based on volume-tiered pricing; for example, orders over 500kg or 1 ton usually trigger a 10-15% discount. Discuss long-term supply contracts to hedge against raw material price volatility. Also, request free samples (50g-100g) for lab testing before committing to a full container load.

Provide your customs broker with the correct HS Code (typically 3204.19). Ensure all documents, including the Commercial Invoice, Packing List, and COA, are consistent. Be aware of anti-dumping duties that may apply to specific chemical categories in your region to avoid unexpected import costs.