19689-51-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 19689-51-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,6,8 and 9 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 19689-51:
(7*1)+(6*9)+(5*6)+(4*8)+(3*9)+(2*5)+(1*1)=161
161 % 10 = 1
So 19689-51-1 is a valid CAS Registry Number.