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84-51-5 Usage


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


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


Check Digit Verification of cas no

The CAS Registry Mumber 84-51-5 includes 5 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 2 digits, 8 and 4 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 84-51:
55 % 10 = 5
So 84-51-5 is a valid CAS Registry Number.

84-51-5 Well-known Company Product Price

  • Brand
  • (Code)Product description
  • CAS number
  • Packaging
  • Price
  • Detail
  • Alfa Aesar

  • (L07206)  2-Ethylanthraquinone, 98%   

  • 84-51-5

  • 5g

  • 155.0CNY

  • Detail
  • Alfa Aesar

  • (L07206)  2-Ethylanthraquinone, 98%   

  • 84-51-5

  • 100g

  • 234.0CNY

  • Detail
  • Alfa Aesar

  • (L07206)  2-Ethylanthraquinone, 98%   

  • 84-51-5

  • 500g

  • 663.0CNY

  • Detail
  • Sigma-Aldrich

  • (56884)  2-Ethylanthraquinone  certified reference material, TraceCERT®

  • 84-51-5

  • 56884-100MG

  • 802.62CNY

  • Detail
  • Aldrich

  • (E12206)  2-Ethylanthraquinone  ≥97%

  • 84-51-5

  • E12206-100G

  • 484.38CNY

  • Detail



According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 12, 2017

Revision Date: Aug 12, 2017


1.1 GHS Product identifier

Product name 2-Ethyl anthraquinone

1.2 Other means of identification

Product number -
Other names 9,10-Anthracenedione, 2-ethyl-

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only. Oxidizing/reducing agents,Process regulators
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:84-51-5 SDS

84-51-5Relevant articles and documents

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

Zhang, Dandan,Xu, Gangqiang,Chen, Tao,Chen, Feng

, p. 52199 - 52202 (2014)

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


, p. 9731 - 9740 (2018)

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


, (2021/09/08)

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.

Green synthesis method for preparing 2-alkylanthraquinone from phthalic anhydride in one step


Paragraph 0036-0037; 0040-0041, (2020/06/16)

The invention relates to the technical field of green synthesis of organic matters. The invention relates to a synthetic method, in particular to a green synthetic method for preparing 2-alkylanthraquinone from phthalic anhydride in one step. According to the method, phthalic anhydride and alkylbenzene are used as raw materials, difunctional sulfonic acid type solid acid based on an HZSM-5 molecular sieve is used as a catalyst, phthalic anhydride and alkylbenzene are catalyzed to be subjected to a Friedel-Crafts acylation reaction and a dehydration cyclization reaction at the same time under the action of the catalyst, so that the 2-alkyl anthraquinone is prepared in one step, wherein the bifunctional sulfonic acid type solid acid based on the HZSM-5 molecular sieve is a sulfonic acid typeHZSM-5 molecular sieve obtained by carrying out sulfonation treatment on the HZSM-5 molecular sieve. According to the synthesis method of the 2-alkyl anthraquinone, the bifunctional (with strong Bronsted acidity and Lewis acidity) sulfonic acid type solid acid based on the HZSM-5 molecular sieve is used as the catalyst to replace AlCl3 and fuming sulfuric acid, so that generation of a large amount of waste residues, waste gas and wastewater is avoided, and green production is realized.

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