19989-72-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19989-72-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,9,8 and 9 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 19989-72:
(7*1)+(6*9)+(5*9)+(4*8)+(3*9)+(2*7)+(1*2)=181
181 % 10 = 1
So 19989-72-1 is a valid CAS Registry Number.