1218991-05-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1218991-05-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,8,9,9 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1218991-05:
(9*1)+(8*2)+(7*1)+(6*8)+(5*9)+(4*9)+(3*1)+(2*0)+(1*5)=169
169 % 10 = 9
So 1218991-05-9 is a valid CAS Registry Number.