221552-84-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221552-84-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,5,5 and 2 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 221552-84:
(8*2)+(7*2)+(6*1)+(5*5)+(4*5)+(3*2)+(2*8)+(1*4)=107
107 % 10 = 7
So 221552-84-7 is a valid CAS Registry Number.