1620543-69-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1620543-69-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,6,2,0,5,4 and 3 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1620543-69:
(9*1)+(8*6)+(7*2)+(6*0)+(5*5)+(4*4)+(3*3)+(2*6)+(1*9)=142
142 % 10 = 2
So 1620543-69-2 is a valid CAS Registry Number.