216443-99-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 216443-99-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,6,4,4 and 3 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 216443-99:
(8*2)+(7*1)+(6*6)+(5*4)+(4*4)+(3*3)+(2*9)+(1*9)=131
131 % 10 = 1
So 216443-99-1 is a valid CAS Registry Number.