Tetrahydro-2-ethylanthraquinone
Overview
2-Ethyltetrahydroanthraquinone (2-ETHTHAQ) is a derivative of anthraquinone, primarily employed as a redox catalyst in the anthraquinone process for industrial hydrogen peroxide (H2O2) synthesis. Its hydrogenated form enables cyclic regeneration, making it a sustainable choice for large-scale production. The compound’s stability under process conditions and high selectivity for hydrogenation/oxidation reactions have solidified its role in the chemical industry. It is typically synthesized via catalytic hydrogenation of 2-ethylanthraquinone.
Physical and Chemical Properties
2-ETHTHAQ appears as a light yellow crystalline powder with a molecular weight of 240.30 g/mol. It exhibits low solubility in water but dissolves readily in non-polar organic solvents such as benzene or toluene, facilitating its use in liquid-phase reactions. Key chemical properties include its resistance to thermal degradation and compatibility with palladium catalysts. The melting point ranges between 110–115°C, and it remains stable under inert atmospheres. These traits ensure consistent performance in continuous-flow H2O2 production systems.
Main Applications
The dominant application of 2-ETHTHAQ is in the anthraquinone auto-oxidation process, where it alternates between hydrogenated and oxidized states to produce hydrogen peroxide. This method accounts for over 95% of global H2O2 output due to its efficiency and scalability. Beyond peroxide synthesis, the compound serves as an intermediate in dyes, pharmaceuticals, and specialty polymers. Its redox-active structure enables niche uses in research, such as studying electron-transfer mechanisms.
Safety and Storage
While 2-ETHTHAQ is not classified as acutely toxic, prolonged exposure to dust or solutions may irritate the skin, eyes, or respiratory tract. Industrial handling requires gloves, goggles, and ventilation to minimize risks. Spills should be contained with inert absorbents. Storage recommendations include airtight containers in cool (below 30°C), dry environments. Incompatibility with strong oxidizers necessitates segregated storage. Shelf life typically exceeds two years when properly sealed.
B2B Procurement Guide
Procuring 2-ETHTHAQ demands attention to purity (≥98% by HPLC), which directly impacts H2O2 yield. Suppliers should provide batch-specific Certificates of Analysis (CoA) detailing residual solvents and heavy metals. Bulk purchases (100+ kg) often attract discounts, but transport regulations for organic peroxides may apply. Partner with manufacturers specializing in anthraquinone derivatives to ensure consistent quality and technical support for process optimization.
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