28548-57-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 28548-57-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,8,5,4 and 8 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 28548-57:
(7*2)+(6*8)+(5*5)+(4*4)+(3*8)+(2*5)+(1*7)=144
144 % 10 = 4
So 28548-57-4 is a valid CAS Registry Number.
InChI:InChI=1/C12H10N2O2/c15-13-10-6-8-12(9-7-10)14(16)11-4-2-1-3-5-11/h1-9,16H
28548-57-4Relevant articles and documents
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Boyer,Ellzey
, p. 2038 (1959)
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Process for the preparation of para-nitroso-diphenyl-hydroxylamines
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, (2008/06/13)
An improved process for the preparation of para-nitroso-diphenyl-hydroxylamines is discussed. In the improved process the dimerizing rearrangement of a nitroso benzene is performed in the presence of at least 0.5 mole of a Lewis acid per mole of nitroso compound.