221370-80-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221370-80-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,7 and 0 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221370-80:
(8*2)+(7*2)+(6*1)+(5*3)+(4*7)+(3*0)+(2*8)+(1*0)=95
95 % 10 = 5
So 221370-80-5 is a valid CAS Registry Number.