18689-54-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18689-54-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,6,8 and 9 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 18689-54:
(7*1)+(6*8)+(5*6)+(4*8)+(3*9)+(2*5)+(1*4)=158
158 % 10 = 8
So 18689-54-8 is a valid CAS Registry Number.