1620564-65-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1620564-65-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,0,5,6 and 4 respectively; the second part has 2 digits, 6 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1620564-65:
(9*1)+(8*6)+(7*2)+(6*0)+(5*5)+(4*6)+(3*4)+(2*6)+(1*5)=149
149 % 10 = 9
So 1620564-65-9 is a valid CAS Registry Number.