221133-13-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221133-13-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,3 and 3 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 221133-13:
(8*2)+(7*2)+(6*1)+(5*1)+(4*3)+(3*3)+(2*1)+(1*3)=67
67 % 10 = 7
So 221133-13-7 is a valid CAS Registry Number.
221133-13-7Relevant articles and documents
Reactions of Aromatic Nitrocompounds. LXXII. Anionic σ-Complexes of Nitroarenes in the Azocoupling Reaction
Blokhina,Atroshchenko,Gitis,Blokhin,Grudtsyn,Andrianov,Kaminskii
, p. 499 - 501 (2007/10/03)
In reaction of KBH4 with m-dinitrobenzene in acetonitrile a mixture of isomeric anionic σ-complexes is formed. The reaction of the latter with phenyldiazonium tetrafluoroborates RC6H4N2+BF4