56221-07-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 56221-07-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,2,2 and 1 respectively; the second part has 2 digits, 0 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 56221-07:
(7*5)+(6*6)+(5*2)+(4*2)+(3*1)+(2*0)+(1*7)=99
99 % 10 = 9
So 56221-07-9 is a valid CAS Registry Number.