221283-99-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221283-99-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,2,8 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 221283-99:
(8*2)+(7*2)+(6*1)+(5*2)+(4*8)+(3*3)+(2*9)+(1*9)=114
114 % 10 = 4
So 221283-99-4 is a valid CAS Registry Number.