Solvent black 27

Solvent Black 27 is a metal-complex dye known for its excellent solubility in organic solvents. Buyers should prioritize purity levels (dye content ≥ 98%), moisture content (< 1.0%), and insoluble matter (< 0.5%) to ensure consistent performance. For high-end applications like wood stains or leather finishing, verify the lightfastness (Grade 7-8) and heat resistance (up to 200°C) to prevent fading or degradation during processing.

This dye is highly versatile and primarily used in wood coatings, printing inks (especially inkjet and gravure), leather dyeing, and plastic coloration (PS, ABS, PC). It is also a critical component in permanent markers and ballpoint pen inks due to its deep black hue and rapid drying properties when dissolved in alcohols or ketones.

As a chemical product, it must comply with REACH (Registration, Evaluation, Authorisation and Restriction of Chemicals) for the EU market and TSCA (Toxic Substances Control Act) for the US. Ensure the supplier provides a valid Material Safety Data Sheet (MSDS/SDS) and a Certificate of Analysis (COA) for every batch. If used in food-contact packaging, it must adhere to FDA or EFSA regulations regarding specific migration limits.

Request samples to test solubility in your specific solvent system (e.g., Ethanol, MEK, or Glycol Ethers). A high-quality Solvent Black 27 should offer excellent transparency and leave no residue. Compatibility testing with resins like nitrocellulose, polyurethane, or acrylic is essential to avoid precipitation or viscosity changes in the final formulation.

The primary risks include batch-to-batch color inconsistency, adulteration with cheaper crude dyes, and improper packaging leading to moisture absorption. To mitigate these, use Made-in-China.com's Secured Trading services and insist on pre-shipment inspection (PSI) by third parties like SGS or Intertek to verify the chemical composition.

Solvent Black 27 is typically packed in 25kg fiber drums or iron drums with inner plastic liners. Since it is a fine powder, ensure the packaging is hermetically sealed to prevent leakage and environmental contamination. For shipping, classify the goods correctly according to IMDG codes; while often non-hazardous, some metal-complex dyes may require specific UN-rated packaging depending on the concentration of heavy metals.

Focus on volume-based pricing; for orders exceeding 500kg, you can typically negotiate a 10-15% discount. Discuss long-term supply contracts to hedge against raw material price fluctuations (like chromium or cobalt salts). Additionally, request FOB (Free On Board) terms if you have a reliable freight forwarder, as this gives you better control over the logistics costs and transit times.

Look for Audited Suppliers who have undergone on-site verification. Check for ISO 14001 (Environmental Management) and ISO 9001 (Quality Management) certifications. Review their export history and buyer feedback specifically regarding chemical stability and delivery timelines to ensure they can handle large-scale international orders.