221647-49-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221647-49-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,6,4 and 7 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 221647-49:
(8*2)+(7*2)+(6*1)+(5*6)+(4*4)+(3*7)+(2*4)+(1*9)=120
120 % 10 = 0
So 221647-49-0 is a valid CAS Registry Number.