1643545-71-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1643545-71-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,3,5,4 and 5 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1643545-71:
(9*1)+(8*6)+(7*4)+(6*3)+(5*5)+(4*4)+(3*5)+(2*7)+(1*1)=174
174 % 10 = 4
So 1643545-71-4 is a valid CAS Registry Number.