221000-82-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221000-82-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,0,0 and 0 respectively; the second part has 2 digits, 8 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 221000-82:
(8*2)+(7*2)+(6*1)+(5*0)+(4*0)+(3*0)+(2*8)+(1*2)=54
54 % 10 = 4
So 221000-82-4 is a valid CAS Registry Number.