1998216-51-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1998216-51-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,9,9,8,2,1 and 6 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1998216-51:
(9*1)+(8*9)+(7*9)+(6*8)+(5*2)+(4*1)+(3*6)+(2*5)+(1*1)=235
235 % 10 = 5
So 1998216-51-5 is a valid CAS Registry Number.