689765-17-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 689765-17-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,9,7,6 and 5 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 689765-17:
(8*6)+(7*8)+(6*9)+(5*7)+(4*6)+(3*5)+(2*1)+(1*7)=241
241 % 10 = 1
So 689765-17-1 is a valid CAS Registry Number.