For professionals in the chemical and dye manufacturing sectors, the consistent procurement of high-quality raw materials is fundamental to product integrity and market success. 1,4-Dihydroxyanthraquinone, also recognized as Quinizarin or Solvent Orange 86, is a prime example of such a crucial chemical intermediate. Its role in creating vibrant textile dyes, coloring industrial plastics, and serving as a building block in organic synthesis necessitates a focus on quality assurance when purchasing. This guide outlines the essential factors to consider when you decide to buy 1,4-Dihydroxyanthraquinone, ensuring you partner with a reputable manufacturer and supplier.

The foremost aspect to scrutinize is the purity of the 1,4-Dihydroxyanthraquinone. Leading manufacturers typically guarantee an assay of 99% or higher, often specifying values like 99.5% min. This level of purity is critical for achieving the desired performance in dye synthesis, preventing unwanted side reactions, and ensuring the final product meets stringent industry standards, such as USP, BP, EP, and FCC. When requesting a quote or placing an order, always verify the product's specification sheet and Certificate of Analysis (COA) to confirm its purity and adherence to your application's requirements.

Beyond purity, examining the physical appearance and other physical properties is also important. 1,4-Dihydroxyanthraquinone is generally supplied as an orange to deep orange powder. Key specifications to check include moisture content (typically ≤0.10% for high-grade products), melting point (around 198°C), and the level of insoluble matter, such as toluene intolerance (ideally ≤0.3%). These parameters directly influence the compound's reactivity and handling characteristics, impacting your manufacturing processes. A reliable supplier will readily provide this detailed information.

When you buy Quinizarin, consider the manufacturer's commitment to quality certifications. For instance, ISO 9001 certification indicates a robust quality management system. For specific markets, certifications like REACH pre-registration are also vital. Understanding the supplier's production capabilities, including their annual output and export markets, can also provide insights into their reliability and experience. Suppliers based in China often offer competitive pricing, making them an attractive option, but due diligence regarding quality and compliance is essential.

Investigate the supplier's range of applications for 1,4-Dihydroxyanthraquinone. Whether your need is for creating VAT, disperse, or reactive dyes, coloring plastics and resins, or for general organic synthesis, ensure the manufacturer has a proven track record in supporting these uses. They should be able to provide technical data sheets (TDS) and samples for your own testing and validation. Building a relationship with a supplier who understands your industry and can offer consistent product quality and timely delivery is invaluable.

In conclusion, purchasing 1,4-Dihydroxyanthraquinone demands careful consideration of purity, physical specifications, supplier certifications, and application suitability. By prioritizing these quality parameters and working with experienced manufacturers and suppliers, businesses can secure a reliable source of this essential chemical intermediate, thereby ensuring the excellence and consistency of their own products.