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91318-51-3

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91318-51-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91318-51-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,3,1 and 8 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 91318-51:
(7*9)+(6*1)+(5*3)+(4*1)+(3*8)+(2*5)+(1*1)=123
123 % 10 = 3
So 91318-51-3 is a valid CAS Registry Number.

91318-51-3Upstream product

91318-51-3Relevant articles and documents

Pulse Radiolytic One-electron Oxidation of some Dihydroxy-substituted Anthraquinones

Pal, Haridas,,Palit, Dipak K.,Mukherjee, Tulsi,Mittal, Jai P.

, p. 681 - 688 (2007/10/02)

The spectroscopic characteristics and the kinetic parameters associated with the transients formed on one-electron oxidation of quinizarin (1,4-dihydroxy-9,10-anthraquinone), quinizarin 2- and 6-sulfonates, 1,5-dihydroxy-9,10-anthraquinone and 1,8-dihydroxy-9,10-anthraquinone have been studied by pulse radiolysis and kinetic spectrophotometric techniques, using OH., O.-, N3., Br2.- and .CH2CHO as the oxidising radicals.The pKa and the disproportionation equilibria of the semi-oxidised quinones have been studied for the water-soluble sulfonates.In contrast to the complex decay of the semi- oxidised naphthazarin (5,8-dihydroxy-1,4-naphthoquinone), the semi-oxidised anthraquinone derivatives decay by simple second-order kinetics.The pKa values of the latter are also much higher (ca. 8) compared to the former (ca. 4).The differences observed are attributed to the loss in symmetry in the free radical structures of the semi-oxidised anthraquinone derivatives.

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