689211-91-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 689211-91-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,9,2,1 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 689211-91:
(8*6)+(7*8)+(6*9)+(5*2)+(4*1)+(3*1)+(2*9)+(1*1)=194
194 % 10 = 4
So 689211-91-4 is a valid CAS Registry Number.