For businesses in the chemical and manufacturing sectors, sourcing high-quality raw materials is paramount. Solvent Black 5, also known by its CAS number 11099-03-9 and the common name Nigrosine, is a widely used black dye. This article serves as a comprehensive guide for procurement managers and R&D scientists looking to buy Solvent Black 5, focusing on key considerations when working with China-based suppliers.

Understanding Solvent Black 5 (Nigrosine)
Solvent Black 5 is a versatile organic dye known for its deep black color and its solubility in alcohol and other organic solvents. It is extensively used in the production of inks, shoe polishes, lacquers, and for dyeing leather, wood, and textiles. Its high melting point, often exceeding 300°C, signifies good thermal stability, making it suitable for applications involving heat processes.

Key Specifications to Consider When Purchasing
When evaluating Solvent Black 5 from potential suppliers, particularly manufacturers in China, several specifications are crucial:

• Purity: Look for a minimum purity of 98%. Higher purity ensures better color strength and consistency, minimizing unwanted side reactions in your formulations.
• Appearance: The standard appearance is a black crystalline powder. Variations could indicate impurities or different processing methods.
• Solubility: Confirm its solubility, typically in alcohol. This is vital for its effective incorporation into solvent-based systems.
• CAS Number: Always cross-reference the CAS number 11099-03-9 to ensure you are procuring the exact chemical.
• Packaging: Standard packaging is often 25kg bags. Confirm the packaging meets your handling and storage requirements.

Finding a Reliable China Supplier
China is a major hub for chemical manufacturing, and many reputable companies offer Solvent Black 5. When selecting a supplier, consider the following:

• Experience and Reputation: Look for manufacturers with a proven track record in producing and exporting dyes. Companies like NINGBO INNO PHARMCHEM CO.,LTD. specialize in providing high-quality chemical intermediates and fine chemicals, ensuring you get reliable products.
• Quality Control: Ensure the supplier has robust quality control systems, potentially ISO certified, to guarantee product consistency and compliance with international standards.
• Pricing and MOQ: Obtain quotes from multiple suppliers to compare prices. Also, understand the Minimum Order Quantity (MOQ). Negotiating favorable terms is part of smart procurement.
• Customer Service and Support: Responsive customer service, technical support, and efficient logistics are vital for a smooth purchasing experience.

Applications and Usage Guidance
Solvent Black 5 is a cornerstone ingredient for many industries. Its primary uses include:

• Inks: Used in printing inks, writing inks, and specialty marker inks for its deep color and solvent compatibility.
• Leather and Wood: Provides a rich, durable black finish to leather goods and wooden furniture, offering excellent penetration and color retention.
• Textiles: Employed in dyeing and finishing fabrics, especially where deep black shades are required.
• Shoe Polish: A key component in formulating black shoe polishes for effective coloring and shine.

Conclusion
Purchasing Solvent Black 5 involves careful consideration of specifications and supplier reliability. By partnering with experienced manufacturers and suppliers from China, you can secure a high-quality product at a competitive price. If you are looking to buy Solvent Black 5 or seeking a dependable supplier for your chemical needs, reach out to our expert team for a personalized quote and consultation. We are dedicated to providing you with the best chemical solutions to drive your business forward.