156789-18-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 156789-18-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,7,8 and 9 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 156789-18:
(8*1)+(7*5)+(6*6)+(5*7)+(4*8)+(3*9)+(2*1)+(1*8)=183
183 % 10 = 3
So 156789-18-3 is a valid CAS Registry Number.