159977-54-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 159977-54-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,9,9,7 and 7 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 159977-54:
(8*1)+(7*5)+(6*9)+(5*9)+(4*7)+(3*7)+(2*5)+(1*4)=205
205 % 10 = 5
So 159977-54-5 is a valid CAS Registry Number.
159977-54-5Relevant articles and documents
A highly-efficient synthesis of benzoxazine-2,4-diones
Boontheung, Pinmanee,Perlmutter, Patrick
, p. 2629 - 2630 (2007/10/03)
Base-promoted reaction of salicylate esters with isocyanates provides a highly efficient route to benzoxazine-2,4-diones.
