1643447-97-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1643447-97-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,3,4,4 and 7 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1643447-97:
(9*1)+(8*6)+(7*4)+(6*3)+(5*4)+(4*4)+(3*7)+(2*9)+(1*7)=185
185 % 10 = 5
So 1643447-97-5 is a valid CAS Registry Number.