19656-66-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19656-66-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,6,5 and 6 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 19656-66:
(7*1)+(6*9)+(5*6)+(4*5)+(3*6)+(2*6)+(1*6)=147
147 % 10 = 7
So 19656-66-7 is a valid CAS Registry Number.