19918-55-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19918-55-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,9,1 and 8 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 19918-55:
(7*1)+(6*9)+(5*9)+(4*1)+(3*8)+(2*5)+(1*5)=149
149 % 10 = 9
So 19918-55-9 is a valid CAS Registry Number.