In the intricate world of chemical manufacturing, certain compounds serve as foundational elements that enable a vast array of end products. 1,4-Dihydroxyanthraquinone, also known by its trade names Quinizarin and Solvent Orange 86 (CAS 81-64-1), stands out as one such critical organic intermediate. Its distinct orange crystalline powder appearance belies its immense importance in industries ranging from textiles to plastics and fuels.

Chemical Properties and Structure of Quinizarin

1,4-Dihydroxyanthraquinone is an anthraquinone derivative with the molecular formula C14H8O4 and a molar mass of 240.21 g/mol. It is characterized by the presence of two hydroxyl (-OH) groups attached to the anthraquinone core at the 1 and 4 positions. This specific arrangement of functional groups imparts its unique chemical reactivity and chromophoric properties. Typically supplied with purity levels of 96% or 99%, its physical form is an orange to deep orange powder. Key physical properties include a melting point in the range of 194-197 °C (for crude grade) or ≥198°C (for fine grade), and it is generally insoluble in water but soluble in organic solvents, which is characteristic of many solvent dyes.

The Role of 1,4-Dihydroxyanthraquinone as a Dye Intermediate

The primary application driving demand for 1,4-Dihydroxyanthraquinone is its indispensable role as an intermediate in the synthesis of various high-performance dyes. It is a crucial precursor for VAT dyes, known for their exceptional durability and colorfastness on cellulosic fibers. It is also fundamental in the production of disperse dyes, which are essential for coloring synthetic fibers like polyester, and reactive dyes, used to achieve bright, wash-fast colors on cotton and other natural fibers. Manufacturers seeking to produce specific dyes like Disperse Blue HSR, Disperse Blue 5R, or Acid Anthraquinone Blue R rely heavily on the consistent quality of this intermediate. Exploring options to buy 1,4-Dihydroxyanthraquinone from experienced Chinese manufacturers ensures access to these vital dye-building blocks.

Industrial Coloring Applications: Beyond Textiles

The inherent coloring capabilities of 1,4-Dihydroxyanthraquinone make it valuable for industrial coloring applications where vibrancy and stability are key. It is widely used to impart color to various plastics and resins, contributing to the aesthetic appeal and identification of numerous consumer and industrial products. Furthermore, its use in coloring gasoline and heating oils for identification purposes highlights its broad applicability in different industrial sectors. Procurement specialists looking to enhance their product offerings with consistent coloration can find reliable sources for Solvent Orange 86 through direct inquiries with established suppliers.

In summary, 1,4-Dihydroxyanthraquinone (CAS 81-64-1) is a vital chemical intermediate with a significant impact on the color industry. Its versatility as a precursor for dyes and its utility in industrial coloring underscore its importance. By understanding its chemical properties and applications, businesses can make informed decisions when sourcing this crucial compound, benefiting from the competitive landscape offered by manufacturers and suppliers.