1643369-84-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1643369-84-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,4,3,3,6 and 9 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1643369-84:
(9*1)+(8*6)+(7*4)+(6*3)+(5*3)+(4*6)+(3*9)+(2*8)+(1*4)=189
189 % 10 = 9
So 1643369-84-9 is a valid CAS Registry Number.