84-51-5

Basic information

• Product Name: 2-Ethyl anthraquinone
• Synonyms: 10-Anthracenedione,2-ethyl-9;2-ethyl-10-anthracenedione;2-Ethyl-9,10-anthraquinone;2-Ethylanthra-9,10-quinone;2-ethyl-anthraquinon;9,10-Anthracenedione,2-ethyl-;Anthraquinone, 2-ethyl-;beta-ethylanthraquinone
• CAS NO: 84-51-5
• Molecular Formula: C₁₆H₁₂O₂
• Molecular Weight: 236.27
• EINECS: 201-535-4
• Product Categories: Intermediates of Dyes and Pigments;Organics;Anthraquinones;Chloroanthraquine, etc.;Functional Materials;Photopolymerization Initiators;Photoluminescent Materials > Light-Emitting Dopants and Fluorescent Dyes;Photonic and Optical Materials
• Mol File: 84-51-5.mol
• Article Data: 32

Chemical Properties

• Melting Point: 108-111 °C(lit.)
• Boiling Point: 180-190°C
• Flash Point: >210°C
• Appearance: white or yellowish crystals or powder
• Density: 1.27 g/cm3 (21℃)
• Vapor Pressure: 4.14E-07mmHg at 25°C
• Refractive Index: 1.6290 (estimate)
• Storage Temp.: Store below +30°C.
• Solubility: 0.00025g/l
• Water Solubility: Insoluble in water.
• Stability: Stable. Combustible. Incompatible with strong oxidizing agents.
• BRN: 1969873
• CAS DataBase Reference: 2-Ethyl anthraquinone(CAS DataBase Reference)
• NIST Chemistry Reference: 2-Ethyl anthraquinone(84-51-5)
• EPA Substance Registry System: 2-Ethyl anthraquinone(84-51-5)

Safety Data

• Hazard Codes: Xn,N
• 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
• TSCA: Yes
• Hazardous Substances Data: 84-51-5(Hazardous Substances Data)

Usage

Description

2-Ethylanthraquinone is an organic compound that is a derivative of anthraquinone. It is commonly used in the industrial production of hydrogen peroxide (H2O2) due to its high selectivity. Another major application is the production of dyes2. It can also be used as a photo-initiator of crosslinking or degradation of polyethylene3.

Chemical Properties

white or yellowish crystals or powder

Uses

Different sources of media describe the Uses of 84-51-5 differently. You can refer to the following data:
1. Synthesis, especially of hydrogen peroxide.
2. 2-Ethylanthraquinone can be used as a photoinitiator of crosslinking or degradation of polyethylene. It is used to produce hydrogen peroxide by hydrogenation with the help of Pd/polyaniline as the catalysts.

Flammability and Explosibility

Nonflammable

InChI:InChI=1/C16H12O2/c1-2-10-7-8-13-14(9-10)16(18)12-6-4-3-5-11(12)15(13)17/h3-9H,2H2,1H3

Upstream product

• 52251-71-5 2-ethylanthracene 
• 85-44-9 phthalic anhydride 
• 100-41-4 ethylbenzene 
• 1151-14-0 2-(4’-ethylbenzoyl)benzoic acid 
• 70419-43-1 9,10-diacetoxy-2-ethylanthracene 
• 839-73-6 2-ethylanthracene-9,10-diol 
• 78246-03-4 ortho(4'-ethylbenzoyl)benzoic acid chloride 
• 10210-32-9 2-acetylanthracene 
• 62167-65-1 2-ethyl-9,10-dihydroanthracene 
• 26708-04-3 2-ethyl-9,10-dimethoxy-anthracene 
• 142354-70-9 2-(3-Ethyl-benzoyl)-benzoic acid 
• 3248-28-0 dipropionyl peroxide 
• 84-65-1 9,10-phenanthrenequinone 
• 64-19-7 acetic acid 

Downstream Products

• 36232-18-5 9,10-Bis-acetylcarbamoyloxy-2-aethyl-anthracen 
• 68279-54-9 2-ethyl-5,6,7,8-tetrahydro-9,10-anthrahydroquinone 
• 7722-84-1 dihydrogen peroxide 
• 839-73-6 2-ethylanthracene-9,10-diol 
• 286463-72-7 2-ethyl-9H-10-anthranone 
• 76682-71-8 2-ethyl-10H-9-anthranone 
• 63592-75-6 2-ethyl-1,2,3,4-tetrahydro-9,10-anthrahydroquinone 
• 15547-17-8 6-ethyl-1,2,3,4-tetrahydroanthracene-9,10-dione 
• 70419-43-1 9,10-diacetoxy-2-ethylanthracene 
• 26708-04-3 2-ethyl-9,10-dimethoxy-anthracene 
• 767340-63-6 tetrahydro-2-ethylanthrone 
• 1456629-35-8 methyl 3-[1-(9,10-dioxo-9,10-dihydroanthracen-2-yl)ethyl]-5-phenyl-1H-1,2,3-triazole-4-carboxylate 
• 1456629-34-7 2-{1-[4-(3-ethynylphenyl)-1,2,3-triazol-1-yl]ethyl}anthraquinone 
• 1456629-48-3 2-(3-phenylpentan-2-yl)anthraquinone 

Relevant articles and documents

Photocatalytically green synthesis of H2O2 using 2-ethyl-9,10-anthraquinone as an electron condenser

A high level (～9 mM) of hydrogen peroxide is photocatalytically synthesized by using O2 as an oxidant and 2-ethyl-9,10-anthraquinone (EAQ) as an electron condenser. The photo-catalytic efficiency of the EAQ-assisted H2O2 production is ca. 10-fold higher than that of H2 generation with Pt/P25. This journal is

Engineering the porosity and acidity of H-Beta zeolite by dealumination for the production of 2-ethylanthraquinone via 2-(4′-ethylbenzoyl)benzoic acid dehydration

Environmentally-friendly zeolites have been used commercially to replace concentrated sulfuric acid and oleum in the alkylation reactions and dehydration of alcohols. However, moderate activity, associated with access and diffusion limitations, low intramolecular dehydration selectivity, associated with unsatisfactory acidity, and unknown reusability have hampered their industrial implementation in the dehydration of bulky 2-(4′-ethylbenzoyl)benzoic acid (E-BBA) to 2-ethylanthraquinone (2-EAQ). Herein, we have discovered that after being treated with mild HNO3, nano-sized H-Beta zeolite showed outstanding catalytic activity, selectivity and reusability, compared with a commercial oleum catalyst. A number of techniques, such as XRD, XPS, XRF, 29Si MAS NMR, 27Al MQ MAS NMR, FTIR, NH3-TPD, argon physisorption and HR-TEM, have been employed to decouple the interdependence between acidity, porosity and catalytic performance. It was found that mild HNO3 treatment could clean out the extra-framework aluminium deposits and selectively extract the aluminium species on the outer surface of Beta zeolites, which strengthened the acidity of the Br?nsted acid sites (Si(OH)Al) inside the H-Beta micropores, thus increasing the possibility of intramolecular dehydration of E-BBA. Moreover, this mild HNO3 treatment also dredged the network of intercrystalline mesopores, alleviating the diffusion constraints. Therefore, through the dual adjustment of acidity and porosity, dealuminated H-Beta zeolite has a promising future in the green synthesis of 2-EAQ.

Friedel - gram acylating reaction method based on phthalic anhydride and aromatic alkyl compound

A part of a substituted alkylbenzene is used as a solvent and a reaction raw material for - gram acylating reaction, a part of a substituted alkylbenzene is dissolved in a reaction raw material phthalic anhydride and a chloroaluminate ionic liquid catalyst, and a residual part of a substituted alkylbenzene is added dropwise - to obtain - (2 - 4' - alkylbenzoyl) benzoic acid intermediate. 2 -position positioning selectivity of the method is higher, and the reaction production cost is low.

PROCESS FOR PRODUCING SUBSTITUTED ANTHRAQUINONE

A process for manufacturing a compound of formula (II), said process comprising a step of reacting a compound of formula (I) in the presence of a zeolite catalyst and a solvent, (I), (II) wherein R1, R2, R3, R4, R5, R6, R7 and R8 are independently H, halo, C1-C12 alkyl, C1-C12 alkyloxy, C2-C12 alkenyl, C2-C12 alkenyloxy, C2-C12 alkynyl, C2-C12 alkynyloxy, C3-C8 cycloalkyl, C3-C8 cycloalkyloxy, C6-C10 aryl, C6-C10 aryloxy, C7-C10 aralkyl, C7-C10 alkylaryl or C4-C7 heteroaryl; and wherein the solvent is a halogen substituted aromatic compound.