156980-61-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156980-61-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,9,8 and 0 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 156980-61:
(8*1)+(7*5)+(6*6)+(5*9)+(4*8)+(3*0)+(2*6)+(1*1)=169
169 % 10 = 9
So 156980-61-9 is a valid CAS Registry Number.