817-70-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 817-70-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,1 and 7 respectively; the second part has 2 digits, 7 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 817-70:
(5*8)+(4*1)+(3*7)+(2*7)+(1*0)=79
79 % 10 = 9
So 817-70-9 is a valid CAS Registry Number.