680971-65-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 680971-65-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,0,9,7 and 1 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 680971-65:
(8*6)+(7*8)+(6*0)+(5*9)+(4*7)+(3*1)+(2*6)+(1*5)=197
197 % 10 = 7
So 680971-65-7 is a valid CAS Registry Number.