Overview
Dinitroanthraquinone is an organic compound derived from anthraquinone, featuring nitro groups at the 1,5- or 1,8-positions. It is a key intermediate in the production of anthraquinone dyes, which are widely used in textiles, printing, and specialty coatings. The compound’s stability and reactivity make it valuable for synthesizing high-performance colorants. Industrially, dinitroanthraquinone is produced through the nitration of anthraquinone using nitric acid or mixed acids. The process requires careful control to avoid over-nitration and ensure product purity. Due to its role in dye manufacturing, it is primarily traded in bulk quantities within the chemical supply chain.
Physical and Chemical Properties
Dinitroanthraquinone appears as a yellow to orange crystalline powder with a molecular weight of 298.21 g/mol. It decomposes at temperatures above 310°C without boiling, reflecting its thermal stability. The compound is insoluble in water but dissolves in concentrated sulfuric acid and some organic solvents like nitrobenzene. Its chemical structure includes two nitro groups attached to an anthraquinone backbone, contributing to its reactivity as an electrophile in substitution reactions. This property is exploited in dye synthesis, where it undergoes further functionalization to create complex colorants. Handling requires caution due to its irritant nature and potential dust formation.
Main Applications
The primary use of dinitroanthraquinone is as an intermediate in the synthesis of anthraquinone dyes, such as vat dyes and disperse dyes. These dyes are valued for their brightness, colorfastness, and resistance to fading, making them suitable for textiles, plastics, and inks. Additionally, the compound serves as a precursor for specialty chemicals, including photoactive compounds and agrochemicals. Its nitro groups can be reduced to amines, enabling further derivatization. In research, it is studied for potential applications in organic electronics due to its conjugated aromatic system.
Safety and Storage
Dinitroanthraquinone poses moderate health risks, including skin and eye irritation. Prolonged exposure to dust or vapors should be avoided. Personal protective equipment (PPE) such as gloves, goggles, and respirators is recommended during handling. Storage conditions are critical to maintain stability. The compound should be kept in a cool, dry place, away from heat sources and oxidizing agents. Containers must be tightly sealed to prevent moisture absorption and contamination. Spills should be contained using inert absorbents and disposed of according to local regulations.
B2B Procurement Guide
When procuring dinitroanthraquinone, buyers should prioritize suppliers with certifications (e.g., ISO, REACH) to ensure quality and compliance. Key specifications include purity (typically 95–99%), CAS number verification, and packaging options (e.g., 25 kg drums or custom bulk quantities). Price negotiation is common for large orders, with discounts available for long-term contracts. Buyers should also assess logistics, including storage facilities and transportation requirements, to prevent degradation. Sampling and lab testing are advisable to confirm product suitability before full-scale purchase.
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