1689515-64-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1689515-64-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,8,9,5,1 and 5 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1689515-64:
(9*1)+(8*6)+(7*8)+(6*9)+(5*5)+(4*1)+(3*5)+(2*6)+(1*4)=227
227 % 10 = 7
So 1689515-64-7 is a valid CAS Registry Number.