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142763-32-4

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142763-32-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 142763-32-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,2,7,6 and 3 respectively; the second part has 2 digits, 3 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 142763-32:
(8*1)+(7*4)+(6*2)+(5*7)+(4*6)+(3*3)+(2*3)+(1*2)=124
124 % 10 = 4
So 142763-32-4 is a valid CAS Registry Number.

142763-32-4SDS

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 DPQ

1.2 Other means of identification

Product number -
Other names 2,2'',6,6''-tetramethyldiphenoquinone

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:142763-32-4 SDS

142763-32-4Downstream Products

142763-32-4Relevant articles and documents

Metal complexes catalyzed oxidative coupling of 2,6-dimethylphenol in micellar media

Li, Xiao-Hong,Meng, Xiang-Guang,Pang, Qin-Hui,Liu, Shan-Dong,Li, Jian-Mei,Du, Juan,Hu, Chang-Wei

, p. 88 - 92 (2010)

The oxidative coupling reaction of 2,6-dimethylphenol (DMP) with H 2O2 catalyzed by two copper(II) complexes (2,2′-dipyridylamine copper(II), L1Cu and N,N′-bis (2-pyridinecarbonyl) ethylenediamine copper(II), L2Cu) in cationic surfactant cetyl trimethylammonium bromide (CTAB), gemini surfactants ethanediyl-1,2-bis(dodecyldimethylammonium bromide) (12-2-12), dimethylene-1,2-bis(cetyltrimethylammonium bromide) (16-2-16), anionic surfactant sodium dodecyl benzene sulfornate (SDBS) and nonionic surfactant Triton X-100 (TX-100) micellar media were comparatively investigated at 25 °C. The kinetics of formation of 3,3′,5,5′-tetramethyl-4, 4′-diphenoquinone (DPQ) was studied. The kinetic parameters k2 and Km were obtained at pH 7.01. L1Cu displayed better catalytic activity than L2Cu in mentioned above systems. For L 1Cu catalyzed systems, the cationic surfactant CTAB, 12-2-12 and 16-2-16 micellar media accelerated the oxidation of DMP. And the TX-100 and SDBS micelles showed little effect on reaction rate compared with the buffer solution. For the L2Cu catalyzed systems, these surfactants all inhibited the oxidation of DMP, and especially, the oxidation of DMP was not found in SDBS micellar solution in the catalyzed system at pH 7.01 and 25 °C. Micelles showed great influence on the yield of product and the selectivity of PPO. Under this work's conditions, DPQ was easily generated in aqueous solution, while PPO was remarkably promoted in micellar media, especially in SDBS micellar solution. As a green technology process, one outstanding advantage of this catalyzed system was that the products of polymer can be easily separated from the solution and the catalysts still remain in the micellar solution.

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