56642-24-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56642-24-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,6,4 and 2 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 56642-24:
(7*5)+(6*6)+(5*6)+(4*4)+(3*2)+(2*2)+(1*4)=131
131 % 10 = 1
So 56642-24-1 is a valid CAS Registry Number.