2-Ethyl anthraquinone CAS#84-51-5
Highly Effective Catalyst Performance – Widely used as a key catalyst in hydrogen peroxide production, offering reliable and efficient reaction performance in industrial processes.
Good Solubility and Purification Properties – Easily soluble in benzene and can be readily recrystallized from ethanol or acetic acid, enabling convenient purification and high product quality.
Stable Crystalline Form – Appears as a pale yellow to light amber crystalline solid with a defined melting point around 108 °C, ensuring consistent physical properties during handling and processing.
Suitable Thermal Characteristics – Lower melting point than anthraquinone allows easier melting and processing, improving operational efficiency in catalytic applications.
2-Ethyl anthraquinone (CAS# 84-51-5) is a pale yellow to light amber crystalline solid primarily used as a catalyst in the industrial production of hydrogen peroxide，Pale yellow solid, melting point lower than anthraquinone, soluble in benzene, can be recrystallized from ethanol or acetic acid, melting point 108℃.
2-Ethyl anthraquinone Chemical Properties
| Melting point | 108-111 °C (lit.) |
| Boiling point | 180-190°C |
| Density | 1.27 g/cm3 (21℃) |
| Vapor pressure | <1 hPa (25 °C) |
| Refractive index | 1.6290 (estimate) |
| Fp | >210°C |
| Storage temp | Store below +30°C. |
| Solubility | 0.00025g/l |
| Form | powder to crystal |
| Color | Light yellow to Amber to Dark green |
| Water Solubility | Insoluble in water. |
| BRN | 1969873 |
| Stability | Stable. Combustible. Incompatible with strong oxidizing agents. |
| InChIKey | SJEBAWHUJDUKQK-UHFFFAOYSA-N |
| LogP | 4.6 |
| CAS DataBase Reference | 84-51-5(CAS DataBase Reference) |
| NIST Chemistry Reference | 9,10-Anthracenedione, 2-ethyl-(84-51-5) |
| EPA Substance Registry System | 2-Ethylanthraquinone (84-51-5) |
Safety Information
| Hazard Codes | Xn,N |
| Risk Statements | 22-36/37/38-50/53-48/22 |
| Safety Statements | 24/25-36-26-61-60-37 |
| RIDADR | UN 3077 9 / PGIII |
| WGK Germany | 1 |
| RTECS | CB0525000 |
| Autoignition Temperature | 485 °C |
| TSCA | Yes |
| HS Code | 29146990 |
| Toxicity | LD50 orally in Rabbit: > 6400 mg/kg |
Product Application of 2-Ethyl Anthraquinone CAS#84-51-5
2-Ethyl anthraquinone is first hydrogenated in a solvent to form 2-ethylhydroanthraquinone, which is then re-oxidized to regenerate 2-ethylanthraquinone while producing hydrogen peroxide. This cyclic reaction is widely applied in industrial hydrogen peroxide manufacturing. The compound can be synthesized through the Friedel–Crafts acylation of phthalic anhydride with ethylbenzene, or via a Diels–Alder reaction between 1,4-naphthoquinone and 2-ethyl-1,3-butadiene followed by dehydrogenation. It is mainly used in hydrogen peroxide production and as an intermediate for dyes. In addition, it serves as a photosensitizer in photosensitive resins, a catalyst for photocurable resins, and is applied in photodegradable films, coatings, and as an initiator for photosensitive polymerization.
