2140-66-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2140-66-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,4 and 0 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 2140-66:
(6*2)+(5*1)+(4*4)+(3*0)+(2*6)+(1*6)=51
51 % 10 = 1
So 2140-66-1 is a valid CAS Registry Number.