81-26-5

Basic information

• Product Name: 2,2'-dimethyl-1,1'-bianthraquinone
• Synonyms: 2,2'-dimethyl-1,1'-bianthraquinone;1-(2-methyl-9,10-dioxoanthracene-1-yl)-2-methylanthracene-9,10-dione;1,1'-Bi(2-methylanthraquinone);2,2'-Dimethyl-1,1'-bi[9,10-anthraquinone];1-(9,10-diketo-2-methyl-1-anthryl)-2-methyl-9,10-anthraquinone;2-methyl-1-(2-methyl-9,10-dioxo-anthracen-1-yl)anthracene-9,10-dione;2-methyl-1-(2-methyl-9,10-dioxoanthracen-1-yl)anthracene-9,10-dione
• CAS NO: 81-26-5
• Molecular Formula: C₃₀H₁₈O₄
• Molecular Weight: 442.46152
• EINECS: 201-338-3
• Mol File: 81-26-5.mol
• Article Data: 1

Chemical Properties

• Boiling Point: 513.08°C (rough estimate)
• Appearance: /
• Density: 1.1486 (rough estimate)
• Refractive Index: 1.6400 (estimate)
• CAS DataBase Reference: 2,2'-dimethyl-1,1'-bianthraquinone(CAS DataBase Reference)
• NIST Chemistry Reference: 2,2'-dimethyl-1,1'-bianthraquinone(81-26-5)
• EPA Substance Registry System: 2,2'-dimethyl-1,1'-bianthraquinone(81-26-5)

Safety Data

• Hazardous Substances Data: 81-26-5(Hazardous Substances Data)

Usage

General Description

2,2'-Dimethyl-1,1'-bianthraquinone, also known as R-Squarrose, is a chemical compound predominantly used as a redox mediator in lithium batteries. It is a dark red crystalline powder with a molecular formula of C32H22O4 and a molecular weight of 478.51 g/mol. 2,2'-Dimethyl-1,1'-bianthraquinone is a derivative of the anthraquinone family and is notable for its excellent stability, solubility, and reversible redox properties. It is often utilized as a cathode additive in lithium-ion batteries to improve their performance, stability, and cycle life. Additionally, 2,2'-Dimethyl-1,1'-bianthraquinone is also being studied for potential applications in organic electronic devices and as a catalyst in organic synthesis.

Upstream product

• 92439-31-1 2-methylanthraquinone-1-sulfonic acid 
• 129-15-7 1-nitro-2-methylanthraquinone 
• 84-54-8 2-methylanthracene-9,10-dione 
• 91-20-3 naphthalene 
• 129-35-1 1-chloro-2-methylanthraquinone 
• 120-12-7 anthracene 
• 861607-70-7 2,2'-dimethyl-1,1'-disulfanediyl-di-anthraquinone 
• 74214-82-7 1-iodo-2-methylanthraquinone 
• 82-26-8 1-bromo-2-methylanthraquinone 
• 7664-93-9 sulfuric acid 
• 82-28-0 disperse orange 11 

Downstream Products

• 128-70-1 pyranthrone 
• 6336-98-7 3,4-dimethyl-dibenzo[a,o]perylene-7,16-dione 

Relevant articles and documents

Method for synthesizing Vat Golden Orange G original dye

The invention discloses a method for synthesizing a Vat Golden Grange G original dye, which includes the specific steps of: (1) a bromination reaction: taking 2-methyl anthraquinone as a raw material, taking an aprotic solvent as a medium, and reacting with a liquid bromine in a weak base environment to generate 1-bromo-2-methyl anthraquinone; (2) a coupling reaction: taking the 1-bromo-2-methyl anthraquinone as the raw material, adding a catalyst, taking the aprotic solvent as the medium, and producing biquinone C through the coupling reaction; and (C) a closed loop oxidation reaction: taking the biquinone C as the raw material, performing the closed loop reaction in a stable solvent formed by a strong base and an alcoholic solvent, and obtaining the Vat Golden Grange G original dye through an air oxidation reaction. In this technology route, by-products are few, the environmental pollution is little, the reaction yield is higher, the reaction time is shorter, and the industrial production is more convenient.