20216-89-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20216-89-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,2,1 and 6 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 20216-89:
(7*2)+(6*0)+(5*2)+(4*1)+(3*6)+(2*8)+(1*9)=71
71 % 10 = 1
So 20216-89-1 is a valid CAS Registry Number.