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2-Ethyl Anthraquinone
2-Ethyl Anthraquinone is an aromatic quinone derivative that belongs to the anthracene-based quinones. In scientific literature, it is often referred to as 2-EAQ. The compound is of great industrial relevance, above all as the key working material in the anthraquinone process for hydrogen peroxide production. In this large-scale method, 2-Ethyl Anthraquinone is alternately hydrogenated and oxidized in a closed cycle, with hydrogen peroxide formed as a valuable by-product. Since the substance itself is regenerated, only small catalytic amounts are consumed, making it highly cost-efficient and sustainable. Industrial manufacturing of 2-Ethyl Anthraquinone is usually carried out via Friedel–Crafts alkylation of anthraquinone with ethylene in the presence of acid catalysts.
In addition to its central role in hydrogen peroxide production, 2-Ethyl Anthraquinone is used as an intermediate in the manufacture of dyes and pigments, in the synthesis of fine chemicals, and in specialized oxidation–reduction processes. Its aromatic quinone structure makes it a versatile starting point for further functionalizations in organic chemistry.
At PENPET, you can easily order the quantity of 2-Ethyl Anthraquinone you need. We look forward to your inquiry for an individual offer. The crystalline solid is supplied in 500 kg big bags, ensuring safe transport and long-term supply reliability.
CAS No.: 84-51-5
EINECS No.: 201-535-4
Molecular formula: C₁₆H₁₂O₂
Synonyms: 2-EAQ, 2-Ethylanthracene-9,10-dione, 2-Ethyl-9,10-anthraquinone
Areas of application: raw material for the production of hydrogen peroxide, intermediate in the dye and pigment industry, raw material in fine chemical synthesis, oxidation–reduction reagent in industrial processes.
More Information
The product is essentially pure 2-Ethyl Anthraquinone (≥ 99 % typical), free from significant impurities that would interfere in its applications.
Its structure comprises the anthraquinone core (9,10-anthracenedione) substituted at the 2-position by an ethyl group (–C₂H₅).
Physical and chemical properties
2-Ethyl Anthraquinone is a solid at ambient conditions, present as pale yellow to off-white crystals or powder. Its melting point lies between 105–111 °C and it decomposes or sublimes at higher temperatures. Its density is about 1.2 g/cm³ at 21 °C. The vapor pressure at 25 °C is low (less than 0,0002 hPa) and its flash point is relatively high, above 210 °C (i.e. it is relatively non-flammable under normal conditions).
Stability and reactivity
2-Ethyl Anthraquinone is chemically stable under recommended storage conditions. Keep the product dry, in tightly closed packaging, and store in a cool, well-ventilated place away from direct sunlight and sources of ignition. The substance is low-volatile and non-self-reactive; it does not polymerize. As an aromatic quinone, it can undergo reversible redox reactions under process conditions (e.g., catalytic hydrogenation/oxidation in the H₂O₂ cycle) but such reactions are not expected during normal storage and handling.
Toxicology information
The chemical is classified with hazard statements including H373 (May cause damage to organs through prolonged or repeated exposure) and H410 (Very toxic to aquatic life with long lasting effects). Dermal irritation and respiratory irritation are possible under dust exposure. The compound is also listed as potentially carcinogenic in some sources depending on its purity and exposure scenario. 2-Ethyl Anthraquinone is considered very toxic to aquatic life with long-term persistence potential. It is suggested that it has a moderate biodegradability.