2687-66-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2687-66-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,6,8 and 7 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 2687-66:
(6*2)+(5*6)+(4*8)+(3*7)+(2*6)+(1*6)=113
113 % 10 = 3
So 2687-66-3 is a valid CAS Registry Number.