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4,4′-Diphenylquinone (DQ) is an organic compound with the chemical formula C12H8O2. It is a white crystalline solid that is soluble in organic solvents such as ethanol, acetone, and dichloromethane. DQ is a derivative of quinone, a class of compounds known for their redox properties. It is often used as a chemical reagent in various applications, including the synthesis of dyes, pharmaceuticals, and other organic compounds. Due to its ability to undergo redox reactions, DQ can also be used in analytical chemistry for the detection of reducing agents. It is important to handle DQ with care, as it can be harmful if inhaled, ingested, or absorbed through the skin, and it may cause irritation to the eyes, skin, and respiratory system.

494-72-4

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494-72-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 494-72-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,9 and 4 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 494-72:
(5*4)+(4*9)+(3*4)+(2*7)+(1*2)=84
84 % 10 = 4
So 494-72-4 is a valid CAS Registry Number.

494-72-4SDS

SAFETY DATA SHEETS

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

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name 4-(4-oxocyclohexa-2,5-dien-1-ylidene)cyclohexa-2,5-dien-1-one

1.2 Other means of identification

Product number -
Other names 4,4'-Biphenyldione

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
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:494-72-4 SDS

494-72-4Relevant academic research and scientific papers

Reaction of chlorine dioxide with phenol

Ganiev,Suvorkina,Kabal'nova

, p. 1123 - 1128 (2007/10/03)

The kinetics of phenol oxidation with chlorine dioxide in different solvents (2-methylpropan-1-ol, ethanol, 1,4-dioxane, acetone, acetonitrile, ethyl acetate, dichloromethane, heptane, tetrachloromethane, water) was studied by spectrophotometry. In all solvents indicated, the reaction rate is described by an equation of the second order w = k[PhOH] ? [ClO2]. The rate constants were measured (at 10-60°C), and the activation parameters of oxidation were determined. The reaction rate constant depends on the solvent nature. The oxidation products are a mixture of p-benzoquinone, 2-chloro-p-benzoquinone, and diphenoquinone.

Synthesis, characterization, and reactivity of vanadium(V) complexes containing coordinated peroxide and histidine - A model for the active site of enzyme bromoperoxidase

Mukherjee,Ganguly,Bhattacharjee

, p. 471 - 474 (2007/10/03)

Vanadium(V) complexes of the type A[VO(O2)2(HiSt)] (A=H+ or NH4+; Hist=histidine) and [DmpzH][VO(O2)2(Dmpz)] (Dmpz=3,5-dimethylpyrazole) have been synthesized from the reactions of V2O5 or NH4VO3 with H2O2 in the presence of histidine or 3,5-dimethylpyrazole. The complexes have been characterised by elemental analyses, IR, 1H, 13C and 51V NMR and electronic spectroscopic studies. Histidine has been shown to coordinate to vanadium centre through its imidazole nitrogen. Bromination of acetanilide by H[VO(O2)(Hist)] and oxidising capability of [DmpzH][VO(O2)2(Dmpz)] are also reported.

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