191157-93-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 191157-93-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,1,5 and 7 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 191157-93:
(8*1)+(7*9)+(6*1)+(5*1)+(4*5)+(3*7)+(2*9)+(1*3)=144
144 % 10 = 4
So 191157-93-4 is a valid CAS Registry Number.
191157-93-4Relevant articles and documents
Fast synthesis of some flavones under microwave irradiation
Mumtazuddin
, p. 835 - 837 (2007/10/03)
Reactions under microwave irradiation occur under solvent free conditions. Such reactions occur in much shorter time than the usual ones. Fast synthesis of flavone from o-hydroxyacetophenone has been achieved in three steps under microwave irradiation.