691891-08-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 691891-08-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,1,8,9 and 1 respectively; the second part has 2 digits, 0 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 691891-08:
(8*6)+(7*9)+(6*1)+(5*8)+(4*9)+(3*1)+(2*0)+(1*8)=204
204 % 10 = 4
So 691891-08-4 is a valid CAS Registry Number.