680617-81-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 680617-81-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,0,6,1 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 680617-81:
(8*6)+(7*8)+(6*0)+(5*6)+(4*1)+(3*7)+(2*8)+(1*1)=176
176 % 10 = 6
So 680617-81-6 is a valid CAS Registry Number.