56421-59-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56421-59-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,4,2 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 56421-59:
(7*5)+(6*6)+(5*4)+(4*2)+(3*1)+(2*5)+(1*9)=121
121 % 10 = 1
So 56421-59-1 is a valid CAS Registry Number.