691-82-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 691-82-7 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,9 and 1 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 691-82:
(5*6)+(4*9)+(3*1)+(2*8)+(1*2)=87
87 % 10 = 7
So 691-82-7 is a valid CAS Registry Number.